1652 lines
60 KiB
Python
1652 lines
60 KiB
Python
from __future__ import unicode_literals
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import collections
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import copy
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import datetime
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import decimal
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import math
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import warnings
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from base64 import b64decode, b64encode
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from itertools import tee
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from django.db import connection
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from django.db.models.loading import get_model
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from django.db.models.query_utils import QueryWrapper
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from django.conf import settings
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from django import forms
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from django.core import exceptions, validators
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from django.utils.datastructures import DictWrapper
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from django.utils.dateparse import parse_date, parse_datetime, parse_time
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from django.utils.functional import curry, total_ordering, Promise
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from django.utils.text import capfirst
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from django.utils import timezone
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from django.utils.translation import ugettext_lazy as _
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from django.utils.encoding import smart_text, force_text, force_bytes
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from django.utils.ipv6 import clean_ipv6_address
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from django.utils import six
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class Empty(object):
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pass
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class NOT_PROVIDED:
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pass
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# The values to use for "blank" in SelectFields. Will be appended to the start
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# of most "choices" lists.
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BLANK_CHOICE_DASH = [("", "---------")]
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def _load_field(app_label, model_name, field_name):
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return get_model(app_label, model_name)._meta.get_field_by_name(field_name)[0]
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class FieldDoesNotExist(Exception):
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pass
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# A guide to Field parameters:
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#
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# * name: The name of the field specifed in the model.
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# * attname: The attribute to use on the model object. This is the same as
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# "name", except in the case of ForeignKeys, where "_id" is
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# appended.
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# * db_column: The db_column specified in the model (or None).
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# * column: The database column for this field. This is the same as
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# "attname", except if db_column is specified.
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#
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# Code that introspects values, or does other dynamic things, should use
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# attname. For example, this gets the primary key value of object "obj":
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#
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# getattr(obj, opts.pk.attname)
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def _empty(of_cls):
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new = Empty()
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new.__class__ = of_cls
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return new
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@total_ordering
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class Field(object):
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"""Base class for all field types"""
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# Designates whether empty strings fundamentally are allowed at the
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# database level.
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empty_strings_allowed = True
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empty_values = list(validators.EMPTY_VALUES)
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# These track each time a Field instance is created. Used to retain order.
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# The auto_creation_counter is used for fields that Django implicitly
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# creates, creation_counter is used for all user-specified fields.
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creation_counter = 0
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auto_creation_counter = -1
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default_validators = [] # Default set of validators
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default_error_messages = {
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'invalid_choice': _('Value %(value)r is not a valid choice.'),
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'null': _('This field cannot be null.'),
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'blank': _('This field cannot be blank.'),
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'unique': _('%(model_name)s with this %(field_label)s '
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'already exists.'),
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}
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# Generic field type description, usually overridden by subclasses
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def _description(self):
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return _('Field of type: %(field_type)s') % {
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'field_type': self.__class__.__name__
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}
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description = property(_description)
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def __init__(self, verbose_name=None, name=None, primary_key=False,
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max_length=None, unique=False, blank=False, null=False,
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db_index=False, rel=None, default=NOT_PROVIDED, editable=True,
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serialize=True, unique_for_date=None, unique_for_month=None,
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unique_for_year=None, choices=None, help_text='', db_column=None,
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db_tablespace=None, auto_created=False, validators=[],
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error_messages=None):
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self.name = name
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self.verbose_name = verbose_name # May be set by set_attributes_from_name
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self._verbose_name = verbose_name # Store original for deconstruction
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self.primary_key = primary_key
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self.max_length, self._unique = max_length, unique
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self.blank, self.null = blank, null
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self.rel = rel
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self.default = default
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self.editable = editable
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self.serialize = serialize
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self.unique_for_date, self.unique_for_month = (unique_for_date,
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unique_for_month)
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self.unique_for_year = unique_for_year
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self._choices = choices or []
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self.help_text = help_text
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self.db_column = db_column
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self.db_tablespace = db_tablespace or settings.DEFAULT_INDEX_TABLESPACE
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self.auto_created = auto_created
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# Set db_index to True if the field has a relationship and doesn't
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# explicitly set db_index.
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self.db_index = db_index
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# Adjust the appropriate creation counter, and save our local copy.
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if auto_created:
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self.creation_counter = Field.auto_creation_counter
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Field.auto_creation_counter -= 1
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else:
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self.creation_counter = Field.creation_counter
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Field.creation_counter += 1
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self._validators = validators # Store for deconstruction later
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self.validators = self.default_validators + validators
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messages = {}
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for c in reversed(self.__class__.__mro__):
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messages.update(getattr(c, 'default_error_messages', {}))
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messages.update(error_messages or {})
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self._error_messages = error_messages # Store for deconstruction later
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self.error_messages = messages
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def deconstruct(self):
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"""
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Returns enough information to recreate the field as a 4-tuple:
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* The name of the field on the model, if contribute_to_class has been run
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* The import path of the field, including the class: django.db.models.IntegerField
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This should be the most portable version, so less specific may be better.
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* A list of positional arguments
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* A dict of keyword arguments
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Note that the positional or keyword arguments must contain values of the
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following types (including inner values of collection types):
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* None, bool, str, unicode, int, long, float, complex, set, frozenset, list, tuple, dict
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* UUID
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* datetime.datetime (naive), datetime.date
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* top-level classes, top-level functions - will be referenced by their full import path
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* Storage instances - these have their own deconstruct() method
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This is because the values here must be serialised into a text format
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(possibly new Python code, possibly JSON) and these are the only types
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with encoding handlers defined.
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There's no need to return the exact way the field was instantiated this time,
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just ensure that the resulting field is the same - prefer keyword arguments
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over positional ones, and omit parameters with their default values.
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"""
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# Short-form way of fetching all the default parameters
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keywords = {}
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possibles = {
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"verbose_name": None,
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"primary_key": False,
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"max_length": None,
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"unique": False,
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"blank": False,
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"null": False,
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"db_index": False,
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"default": NOT_PROVIDED,
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"editable": True,
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"serialize": True,
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"unique_for_date": None,
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"unique_for_month": None,
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"unique_for_year": None,
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"choices": [],
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"help_text": '',
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"db_column": None,
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"db_tablespace": settings.DEFAULT_INDEX_TABLESPACE,
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"auto_created": False,
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"validators": [],
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"error_messages": None,
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}
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attr_overrides = {
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"unique": "_unique",
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"choices": "_choices",
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"error_messages": "_error_messages",
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"validators": "_validators",
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"verbose_name": "_verbose_name",
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}
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equals_comparison = set(["choices", "validators", "db_tablespace"])
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for name, default in possibles.items():
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value = getattr(self, attr_overrides.get(name, name))
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if name in equals_comparison:
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if value != default:
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keywords[name] = value
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else:
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if value is not default:
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keywords[name] = value
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# Work out path - we shorten it for known Django core fields
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path = "%s.%s" % (self.__class__.__module__, self.__class__.__name__)
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if path.startswith("django.db.models.fields.related"):
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path = path.replace("django.db.models.fields.related", "django.db.models")
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if path.startswith("django.db.models.fields.files"):
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path = path.replace("django.db.models.fields.files", "django.db.models")
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if path.startswith("django.db.models.fields"):
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path = path.replace("django.db.models.fields", "django.db.models")
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# Return basic info - other fields should override this.
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return (
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self.name,
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path,
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[],
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keywords,
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)
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def __eq__(self, other):
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# Needed for @total_ordering
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if isinstance(other, Field):
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return self.creation_counter == other.creation_counter
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return NotImplemented
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def __lt__(self, other):
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# This is needed because bisect does not take a comparison function.
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if isinstance(other, Field):
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return self.creation_counter < other.creation_counter
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return NotImplemented
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def __hash__(self):
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return hash(self.creation_counter)
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def __deepcopy__(self, memodict):
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# We don't have to deepcopy very much here, since most things are not
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# intended to be altered after initial creation.
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obj = copy.copy(self)
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if self.rel:
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obj.rel = copy.copy(self.rel)
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if hasattr(self.rel, 'field') and self.rel.field is self:
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obj.rel.field = obj
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memodict[id(self)] = obj
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return obj
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def __copy__(self):
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# We need to avoid hitting __reduce__, so define this
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# slightly weird copy construct.
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obj = Empty()
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obj.__class__ = self.__class__
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obj.__dict__ = self.__dict__.copy()
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return obj
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def __reduce__(self):
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"""
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Pickling should return the model._meta.fields instance of the field,
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not a new copy of that field. So, we use the app cache to load the
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model and then the field back.
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"""
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if not hasattr(self, 'model'):
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# Fields are sometimes used without attaching them to models (for
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# example in aggregation). In this case give back a plain field
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# instance. The code below will create a new empty instance of
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# class self.__class__, then update its dict with self.__dict__
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# values - so, this is very close to normal pickle.
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return _empty, (self.__class__,), self.__dict__
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if self.model._deferred:
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# Deferred model will not be found from the app cache. This could
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# be fixed by reconstructing the deferred model on unpickle.
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raise RuntimeError("Fields of deferred models can't be reduced")
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return _load_field, (self.model._meta.app_label, self.model._meta.object_name,
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self.name)
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def to_python(self, value):
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"""
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Converts the input value into the expected Python data type, raising
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django.core.exceptions.ValidationError if the data can't be converted.
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Returns the converted value. Subclasses should override this.
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"""
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return value
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def run_validators(self, value):
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if value in self.empty_values:
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return
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errors = []
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for v in self.validators:
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try:
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v(value)
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except exceptions.ValidationError as e:
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if hasattr(e, 'code') and e.code in self.error_messages:
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e.message = self.error_messages[e.code]
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errors.extend(e.error_list)
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if errors:
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raise exceptions.ValidationError(errors)
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def validate(self, value, model_instance):
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"""
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Validates value and throws ValidationError. Subclasses should override
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this to provide validation logic.
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"""
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if not self.editable:
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# Skip validation for non-editable fields.
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return
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if self._choices and value not in self.empty_values:
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for option_key, option_value in self.choices:
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if isinstance(option_value, (list, tuple)):
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# This is an optgroup, so look inside the group for
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# options.
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for optgroup_key, optgroup_value in option_value:
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if value == optgroup_key:
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return
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elif value == option_key:
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return
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raise exceptions.ValidationError(
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self.error_messages['invalid_choice'],
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code='invalid_choice',
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params={'value': value},
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)
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if value is None and not self.null:
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raise exceptions.ValidationError(self.error_messages['null'], code='null')
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if not self.blank and value in self.empty_values:
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raise exceptions.ValidationError(self.error_messages['blank'], code='blank')
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def clean(self, value, model_instance):
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"""
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Convert the value's type and run validation. Validation errors
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from to_python and validate are propagated. The correct value is
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returned if no error is raised.
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"""
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value = self.to_python(value)
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self.validate(value, model_instance)
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self.run_validators(value)
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return value
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def db_type(self, connection):
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"""
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Returns the database column data type for this field, for the provided
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connection.
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"""
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# The default implementation of this method looks at the
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# backend-specific DATA_TYPES dictionary, looking up the field by its
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# "internal type".
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#
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# A Field class can implement the get_internal_type() method to specify
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# which *preexisting* Django Field class it's most similar to -- i.e.,
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# a custom field might be represented by a TEXT column type, which is
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# the same as the TextField Django field type, which means the custom
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# field's get_internal_type() returns 'TextField'.
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#
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# But the limitation of the get_internal_type() / data_types approach
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# is that it cannot handle database column types that aren't already
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# mapped to one of the built-in Django field types. In this case, you
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# can implement db_type() instead of get_internal_type() to specify
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# exactly which wacky database column type you want to use.
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data = DictWrapper(self.__dict__, connection.ops.quote_name, "qn_")
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try:
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return (connection.creation.data_types[self.get_internal_type()]
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% data)
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except KeyError:
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return None
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@property
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def unique(self):
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return self._unique or self.primary_key
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def set_attributes_from_name(self, name):
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if not self.name:
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self.name = name
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self.attname, self.column = self.get_attname_column()
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if self.verbose_name is None and self.name:
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self.verbose_name = self.name.replace('_', ' ')
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def contribute_to_class(self, cls, name, virtual_only=False):
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self.set_attributes_from_name(name)
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self.model = cls
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if virtual_only:
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cls._meta.add_virtual_field(self)
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else:
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cls._meta.add_field(self)
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if self.choices:
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setattr(cls, 'get_%s_display' % self.name,
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curry(cls._get_FIELD_display, field=self))
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def get_attname(self):
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return self.name
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def get_attname_column(self):
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attname = self.get_attname()
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column = self.db_column or attname
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return attname, column
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def get_cache_name(self):
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return '_%s_cache' % self.name
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def get_internal_type(self):
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return self.__class__.__name__
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def pre_save(self, model_instance, add):
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"""
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Returns field's value just before saving.
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"""
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return getattr(model_instance, self.attname)
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def get_prep_value(self, value):
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"""
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Perform preliminary non-db specific value checks and conversions.
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"""
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if isinstance(value, Promise):
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value = value._proxy____cast()
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return value
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def get_db_prep_value(self, value, connection, prepared=False):
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"""Returns field's value prepared for interacting with the database
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backend.
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Used by the default implementations of ``get_db_prep_save``and
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`get_db_prep_lookup```
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"""
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if not prepared:
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value = self.get_prep_value(value)
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return value
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def get_db_prep_save(self, value, connection):
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"""
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Returns field's value prepared for saving into a database.
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"""
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return self.get_db_prep_value(value, connection=connection,
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prepared=False)
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def get_prep_lookup(self, lookup_type, value):
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"""
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Perform preliminary non-db specific lookup checks and conversions
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|
"""
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if hasattr(value, 'prepare'):
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return value.prepare()
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if hasattr(value, '_prepare'):
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return value._prepare()
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|
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if lookup_type in {
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'iexact', 'contains', 'icontains',
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'startswith', 'istartswith', 'endswith', 'iendswith',
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'month', 'day', 'week_day', 'hour', 'minute', 'second',
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'isnull', 'search', 'regex', 'iregex',
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}:
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return value
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elif lookup_type in ('exact', 'gt', 'gte', 'lt', 'lte'):
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return self.get_prep_value(value)
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elif lookup_type in ('range', 'in'):
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return [self.get_prep_value(v) for v in value]
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elif lookup_type == 'year':
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try:
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return int(value)
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except ValueError:
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raise ValueError("The __year lookup type requires an integer "
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"argument")
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raise TypeError("Field has invalid lookup: %s" % lookup_type)
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def get_db_prep_lookup(self, lookup_type, value, connection,
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prepared=False):
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"""
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Returns field's value prepared for database lookup.
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"""
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if not prepared:
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value = self.get_prep_lookup(lookup_type, value)
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if hasattr(value, 'get_compiler'):
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value = value.get_compiler(connection=connection)
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if hasattr(value, 'as_sql') or hasattr(value, '_as_sql'):
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# If the value has a relabeled_clone method it means the
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# value will be handled later on.
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if hasattr(value, 'relabeled_clone'):
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return value
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|
if hasattr(value, 'as_sql'):
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sql, params = value.as_sql()
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else:
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sql, params = value._as_sql(connection=connection)
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return QueryWrapper(('(%s)' % sql), params)
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if lookup_type in ('month', 'day', 'week_day', 'hour', 'minute',
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'second', 'search', 'regex', 'iregex'):
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return [value]
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elif lookup_type in ('exact', 'gt', 'gte', 'lt', 'lte'):
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return [self.get_db_prep_value(value, connection=connection,
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prepared=prepared)]
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elif lookup_type in ('range', 'in'):
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return [self.get_db_prep_value(v, connection=connection,
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prepared=prepared) for v in value]
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|
elif lookup_type in ('contains', 'icontains'):
|
|
return ["%%%s%%" % connection.ops.prep_for_like_query(value)]
|
|
elif lookup_type == 'iexact':
|
|
return [connection.ops.prep_for_iexact_query(value)]
|
|
elif lookup_type in ('startswith', 'istartswith'):
|
|
return ["%s%%" % connection.ops.prep_for_like_query(value)]
|
|
elif lookup_type in ('endswith', 'iendswith'):
|
|
return ["%%%s" % connection.ops.prep_for_like_query(value)]
|
|
elif lookup_type == 'isnull':
|
|
return []
|
|
elif lookup_type == 'year':
|
|
if isinstance(self, DateTimeField):
|
|
return connection.ops.year_lookup_bounds_for_datetime_field(value)
|
|
elif isinstance(self, DateField):
|
|
return connection.ops.year_lookup_bounds_for_date_field(value)
|
|
else:
|
|
return [value] # this isn't supposed to happen
|
|
|
|
def has_default(self):
|
|
"""
|
|
Returns a boolean of whether this field has a default value.
|
|
"""
|
|
return self.default is not NOT_PROVIDED
|
|
|
|
def get_default(self):
|
|
"""
|
|
Returns the default value for this field.
|
|
"""
|
|
if self.has_default():
|
|
if callable(self.default):
|
|
return self.default()
|
|
return force_text(self.default, strings_only=True)
|
|
if (not self.empty_strings_allowed or (self.null and
|
|
not connection.features.interprets_empty_strings_as_nulls)):
|
|
return None
|
|
return ""
|
|
|
|
def get_validator_unique_lookup_type(self):
|
|
return '%s__exact' % self.name
|
|
|
|
def get_choices(self, include_blank=True, blank_choice=BLANK_CHOICE_DASH):
|
|
"""Returns choices with a default blank choices included, for use
|
|
as SelectField choices for this field."""
|
|
blank_defined = False
|
|
for choice, _ in self.choices:
|
|
if choice in ('', None):
|
|
blank_defined = True
|
|
break
|
|
|
|
first_choice = (blank_choice if include_blank and
|
|
not blank_defined else [])
|
|
if self.choices:
|
|
return first_choice + list(self.choices)
|
|
rel_model = self.rel.to
|
|
if hasattr(self.rel, 'get_related_field'):
|
|
lst = [(getattr(x, self.rel.get_related_field().attname),
|
|
smart_text(x))
|
|
for x in rel_model._default_manager.complex_filter(
|
|
self.rel.limit_choices_to)]
|
|
else:
|
|
lst = [(x._get_pk_val(), smart_text(x))
|
|
for x in rel_model._default_manager.complex_filter(
|
|
self.rel.limit_choices_to)]
|
|
return first_choice + lst
|
|
|
|
def get_choices_default(self):
|
|
return self.get_choices()
|
|
|
|
def get_flatchoices(self, include_blank=True,
|
|
blank_choice=BLANK_CHOICE_DASH):
|
|
"""
|
|
Returns flattened choices with a default blank choice included.
|
|
"""
|
|
first_choice = blank_choice if include_blank else []
|
|
return first_choice + list(self.flatchoices)
|
|
|
|
def _get_val_from_obj(self, obj):
|
|
if obj is not None:
|
|
return getattr(obj, self.attname)
|
|
else:
|
|
return self.get_default()
|
|
|
|
def value_to_string(self, obj):
|
|
"""
|
|
Returns a string value of this field from the passed obj.
|
|
This is used by the serialization framework.
|
|
"""
|
|
return smart_text(self._get_val_from_obj(obj))
|
|
|
|
def bind(self, fieldmapping, original, bound_field_class):
|
|
return bound_field_class(self, fieldmapping, original)
|
|
|
|
def _get_choices(self):
|
|
if isinstance(self._choices, collections.Iterator):
|
|
choices, self._choices = tee(self._choices)
|
|
return choices
|
|
else:
|
|
return self._choices
|
|
choices = property(_get_choices)
|
|
|
|
def _get_flatchoices(self):
|
|
"""Flattened version of choices tuple."""
|
|
flat = []
|
|
for choice, value in self.choices:
|
|
if isinstance(value, (list, tuple)):
|
|
flat.extend(value)
|
|
else:
|
|
flat.append((choice, value))
|
|
return flat
|
|
flatchoices = property(_get_flatchoices)
|
|
|
|
def save_form_data(self, instance, data):
|
|
setattr(instance, self.name, data)
|
|
|
|
def formfield(self, form_class=None, **kwargs):
|
|
"""
|
|
Returns a django.forms.Field instance for this database Field.
|
|
"""
|
|
defaults = {'required': not self.blank,
|
|
'label': capfirst(self.verbose_name),
|
|
'help_text': self.help_text}
|
|
if self.has_default():
|
|
if callable(self.default):
|
|
defaults['initial'] = self.default
|
|
defaults['show_hidden_initial'] = True
|
|
else:
|
|
defaults['initial'] = self.get_default()
|
|
if self.choices:
|
|
# Fields with choices get special treatment.
|
|
include_blank = (self.blank or
|
|
not (self.has_default() or 'initial' in kwargs))
|
|
defaults['choices'] = self.get_choices(include_blank=include_blank)
|
|
defaults['coerce'] = self.to_python
|
|
if self.null:
|
|
defaults['empty_value'] = None
|
|
if form_class is None or not issubclass(form_class, forms.TypedChoiceField):
|
|
form_class = forms.TypedChoiceField
|
|
# Many of the subclass-specific formfield arguments (min_value,
|
|
# max_value) don't apply for choice fields, so be sure to only pass
|
|
# the values that TypedChoiceField will understand.
|
|
for k in list(kwargs):
|
|
if k not in ('coerce', 'empty_value', 'choices', 'required',
|
|
'widget', 'label', 'initial', 'help_text',
|
|
'error_messages', 'show_hidden_initial'):
|
|
del kwargs[k]
|
|
defaults.update(kwargs)
|
|
if form_class is None:
|
|
form_class = forms.CharField
|
|
return form_class(**defaults)
|
|
|
|
def value_from_object(self, obj):
|
|
"""
|
|
Returns the value of this field in the given model instance.
|
|
"""
|
|
return getattr(obj, self.attname)
|
|
|
|
def __repr__(self):
|
|
"""
|
|
Displays the module, class and name of the field.
|
|
"""
|
|
path = '%s.%s' % (self.__class__.__module__, self.__class__.__name__)
|
|
name = getattr(self, 'name', None)
|
|
if name is not None:
|
|
return '<%s: %s>' % (path, name)
|
|
return '<%s>' % path
|
|
|
|
|
|
class AutoField(Field):
|
|
description = _("Integer")
|
|
|
|
empty_strings_allowed = False
|
|
default_error_messages = {
|
|
'invalid': _("'%(value)s' value must be an integer."),
|
|
}
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
assert kwargs.get('primary_key', False) is True, \
|
|
"%ss must have primary_key=True." % self.__class__.__name__
|
|
kwargs['blank'] = True
|
|
Field.__init__(self, *args, **kwargs)
|
|
|
|
def deconstruct(self):
|
|
name, path, args, kwargs = super(AutoField, self).deconstruct()
|
|
del kwargs['blank']
|
|
kwargs['primary_key'] = True
|
|
return name, path, args, kwargs
|
|
|
|
def get_internal_type(self):
|
|
return "AutoField"
|
|
|
|
def to_python(self, value):
|
|
if value is None:
|
|
return value
|
|
try:
|
|
return int(value)
|
|
except (TypeError, ValueError):
|
|
raise exceptions.ValidationError(
|
|
self.error_messages['invalid'],
|
|
code='invalid',
|
|
params={'value': value},
|
|
)
|
|
|
|
def validate(self, value, model_instance):
|
|
pass
|
|
|
|
def get_db_prep_value(self, value, connection, prepared=False):
|
|
if not prepared:
|
|
value = self.get_prep_value(value)
|
|
value = connection.ops.validate_autopk_value(value)
|
|
return value
|
|
|
|
def get_prep_value(self, value):
|
|
value = super(AutoField, self).get_prep_value(value)
|
|
if value is None:
|
|
return None
|
|
return int(value)
|
|
|
|
def contribute_to_class(self, cls, name):
|
|
assert not cls._meta.has_auto_field, \
|
|
"A model can't have more than one AutoField."
|
|
super(AutoField, self).contribute_to_class(cls, name)
|
|
cls._meta.has_auto_field = True
|
|
cls._meta.auto_field = self
|
|
|
|
def formfield(self, **kwargs):
|
|
return None
|
|
|
|
|
|
class BooleanField(Field):
|
|
empty_strings_allowed = False
|
|
default_error_messages = {
|
|
'invalid': _("'%(value)s' value must be either True or False."),
|
|
}
|
|
description = _("Boolean (Either True or False)")
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
kwargs['blank'] = True
|
|
Field.__init__(self, *args, **kwargs)
|
|
|
|
def deconstruct(self):
|
|
name, path, args, kwargs = super(BooleanField, self).deconstruct()
|
|
del kwargs['blank']
|
|
return name, path, args, kwargs
|
|
|
|
def get_internal_type(self):
|
|
return "BooleanField"
|
|
|
|
def to_python(self, value):
|
|
if value in (True, False):
|
|
# if value is 1 or 0 than it's equal to True or False, but we want
|
|
# to return a true bool for semantic reasons.
|
|
return bool(value)
|
|
if value in ('t', 'True', '1'):
|
|
return True
|
|
if value in ('f', 'False', '0'):
|
|
return False
|
|
raise exceptions.ValidationError(
|
|
self.error_messages['invalid'],
|
|
code='invalid',
|
|
params={'value': value},
|
|
)
|
|
|
|
def get_prep_lookup(self, lookup_type, value):
|
|
# Special-case handling for filters coming from a Web request (e.g. the
|
|
# admin interface). Only works for scalar values (not lists). If you're
|
|
# passing in a list, you might as well make things the right type when
|
|
# constructing the list.
|
|
if value in ('1', '0'):
|
|
value = bool(int(value))
|
|
return super(BooleanField, self).get_prep_lookup(lookup_type, value)
|
|
|
|
def get_prep_value(self, value):
|
|
value = super(BooleanField, self).get_prep_value(value)
|
|
if value is None:
|
|
return None
|
|
return bool(value)
|
|
|
|
def formfield(self, **kwargs):
|
|
# Unlike most fields, BooleanField figures out include_blank from
|
|
# self.null instead of self.blank.
|
|
if self.choices:
|
|
include_blank = (self.null or
|
|
not (self.has_default() or 'initial' in kwargs))
|
|
defaults = {'choices': self.get_choices(include_blank=include_blank)}
|
|
else:
|
|
defaults = {'form_class': forms.BooleanField}
|
|
defaults.update(kwargs)
|
|
return super(BooleanField, self).formfield(**defaults)
|
|
|
|
|
|
class CharField(Field):
|
|
description = _("String (up to %(max_length)s)")
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super(CharField, self).__init__(*args, **kwargs)
|
|
self.validators.append(validators.MaxLengthValidator(self.max_length))
|
|
|
|
def get_internal_type(self):
|
|
return "CharField"
|
|
|
|
def to_python(self, value):
|
|
if isinstance(value, six.string_types) or value is None:
|
|
return value
|
|
return smart_text(value)
|
|
|
|
def get_prep_value(self, value):
|
|
value = super(CharField, self).get_prep_value(value)
|
|
return self.to_python(value)
|
|
|
|
def formfield(self, **kwargs):
|
|
# Passing max_length to forms.CharField means that the value's length
|
|
# will be validated twice. This is considered acceptable since we want
|
|
# the value in the form field (to pass into widget for example).
|
|
defaults = {'max_length': self.max_length}
|
|
defaults.update(kwargs)
|
|
return super(CharField, self).formfield(**defaults)
|
|
|
|
|
|
# TODO: Maybe move this into contrib, because it's specialized.
|
|
class CommaSeparatedIntegerField(CharField):
|
|
default_validators = [validators.validate_comma_separated_integer_list]
|
|
description = _("Comma-separated integers")
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {
|
|
'error_messages': {
|
|
'invalid': _('Enter only digits separated by commas.'),
|
|
}
|
|
}
|
|
defaults.update(kwargs)
|
|
return super(CommaSeparatedIntegerField, self).formfield(**defaults)
|
|
|
|
|
|
class DateField(Field):
|
|
empty_strings_allowed = False
|
|
default_error_messages = {
|
|
'invalid': _("'%(value)s' value has an invalid date format. It must be "
|
|
"in YYYY-MM-DD format."),
|
|
'invalid_date': _("'%(value)s' value has the correct format (YYYY-MM-DD) "
|
|
"but it is an invalid date."),
|
|
}
|
|
description = _("Date (without time)")
|
|
|
|
def __init__(self, verbose_name=None, name=None, auto_now=False,
|
|
auto_now_add=False, **kwargs):
|
|
self.auto_now, self.auto_now_add = auto_now, auto_now_add
|
|
if auto_now or auto_now_add:
|
|
kwargs['editable'] = False
|
|
kwargs['blank'] = True
|
|
Field.__init__(self, verbose_name, name, **kwargs)
|
|
|
|
def deconstruct(self):
|
|
name, path, args, kwargs = super(DateField, self).deconstruct()
|
|
if self.auto_now:
|
|
kwargs['auto_now'] = True
|
|
del kwargs['editable']
|
|
del kwargs['blank']
|
|
if self.auto_now_add:
|
|
kwargs['auto_now_add'] = True
|
|
del kwargs['editable']
|
|
del kwargs['blank']
|
|
return name, path, args, kwargs
|
|
|
|
def get_internal_type(self):
|
|
return "DateField"
|
|
|
|
def to_python(self, value):
|
|
if value is None:
|
|
return value
|
|
if isinstance(value, datetime.datetime):
|
|
if settings.USE_TZ and timezone.is_aware(value):
|
|
# Convert aware datetimes to the default time zone
|
|
# before casting them to dates (#17742).
|
|
default_timezone = timezone.get_default_timezone()
|
|
value = timezone.make_naive(value, default_timezone)
|
|
return value.date()
|
|
if isinstance(value, datetime.date):
|
|
return value
|
|
|
|
try:
|
|
parsed = parse_date(value)
|
|
if parsed is not None:
|
|
return parsed
|
|
except ValueError:
|
|
raise exceptions.ValidationError(
|
|
self.error_messages['invalid_date'],
|
|
code='invalid_date',
|
|
params={'value': value},
|
|
)
|
|
|
|
raise exceptions.ValidationError(
|
|
self.error_messages['invalid'],
|
|
code='invalid',
|
|
params={'value': value},
|
|
)
|
|
|
|
def pre_save(self, model_instance, add):
|
|
if self.auto_now or (self.auto_now_add and add):
|
|
value = datetime.date.today()
|
|
setattr(model_instance, self.attname, value)
|
|
return value
|
|
else:
|
|
return super(DateField, self).pre_save(model_instance, add)
|
|
|
|
def contribute_to_class(self, cls, name):
|
|
super(DateField, self).contribute_to_class(cls, name)
|
|
if not self.null:
|
|
setattr(cls, 'get_next_by_%s' % self.name,
|
|
curry(cls._get_next_or_previous_by_FIELD, field=self,
|
|
is_next=True))
|
|
setattr(cls, 'get_previous_by_%s' % self.name,
|
|
curry(cls._get_next_or_previous_by_FIELD, field=self,
|
|
is_next=False))
|
|
|
|
def get_prep_lookup(self, lookup_type, value):
|
|
# For dates lookups, convert the value to an int
|
|
# so the database backend always sees a consistent type.
|
|
if lookup_type in ('month', 'day', 'week_day', 'hour', 'minute', 'second'):
|
|
return int(value)
|
|
return super(DateField, self).get_prep_lookup(lookup_type, value)
|
|
|
|
def get_prep_value(self, value):
|
|
value = super(DateField, self).get_prep_value(value)
|
|
return self.to_python(value)
|
|
|
|
def get_db_prep_value(self, value, connection, prepared=False):
|
|
# Casts dates into the format expected by the backend
|
|
if not prepared:
|
|
value = self.get_prep_value(value)
|
|
return connection.ops.value_to_db_date(value)
|
|
|
|
def value_to_string(self, obj):
|
|
val = self._get_val_from_obj(obj)
|
|
return '' if val is None else val.isoformat()
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {'form_class': forms.DateField}
|
|
defaults.update(kwargs)
|
|
return super(DateField, self).formfield(**defaults)
|
|
|
|
|
|
class DateTimeField(DateField):
|
|
empty_strings_allowed = False
|
|
default_error_messages = {
|
|
'invalid': _("'%(value)s' value has an invalid format. It must be in "
|
|
"YYYY-MM-DD HH:MM[:ss[.uuuuuu]][TZ] format."),
|
|
'invalid_date': _("'%(value)s' value has the correct format "
|
|
"(YYYY-MM-DD) but it is an invalid date."),
|
|
'invalid_datetime': _("'%(value)s' value has the correct format "
|
|
"(YYYY-MM-DD HH:MM[:ss[.uuuuuu]][TZ]) "
|
|
"but it is an invalid date/time."),
|
|
}
|
|
description = _("Date (with time)")
|
|
|
|
# __init__ is inherited from DateField
|
|
|
|
def get_internal_type(self):
|
|
return "DateTimeField"
|
|
|
|
def to_python(self, value):
|
|
if value is None:
|
|
return value
|
|
if isinstance(value, datetime.datetime):
|
|
return value
|
|
if isinstance(value, datetime.date):
|
|
value = datetime.datetime(value.year, value.month, value.day)
|
|
if settings.USE_TZ:
|
|
# For backwards compatibility, interpret naive datetimes in
|
|
# local time. This won't work during DST change, but we can't
|
|
# do much about it, so we let the exceptions percolate up the
|
|
# call stack.
|
|
warnings.warn("DateTimeField received a naive datetime (%s)"
|
|
" while time zone support is active." % value,
|
|
RuntimeWarning)
|
|
default_timezone = timezone.get_default_timezone()
|
|
value = timezone.make_aware(value, default_timezone)
|
|
return value
|
|
|
|
try:
|
|
parsed = parse_datetime(value)
|
|
if parsed is not None:
|
|
return parsed
|
|
except ValueError:
|
|
raise exceptions.ValidationError(
|
|
self.error_messages['invalid_datetime'],
|
|
code='invalid_datetime',
|
|
params={'value': value},
|
|
)
|
|
|
|
try:
|
|
parsed = parse_date(value)
|
|
if parsed is not None:
|
|
return datetime.datetime(parsed.year, parsed.month, parsed.day)
|
|
except ValueError:
|
|
raise exceptions.ValidationError(
|
|
self.error_messages['invalid_date'],
|
|
code='invalid_date',
|
|
params={'value': value},
|
|
)
|
|
|
|
raise exceptions.ValidationError(
|
|
self.error_messages['invalid'],
|
|
code='invalid',
|
|
params={'value': value},
|
|
)
|
|
|
|
def pre_save(self, model_instance, add):
|
|
if self.auto_now or (self.auto_now_add and add):
|
|
value = timezone.now()
|
|
setattr(model_instance, self.attname, value)
|
|
return value
|
|
else:
|
|
return super(DateTimeField, self).pre_save(model_instance, add)
|
|
|
|
# contribute_to_class is inherited from DateField, it registers
|
|
# get_next_by_FOO and get_prev_by_FOO
|
|
|
|
# get_prep_lookup is inherited from DateField
|
|
|
|
def get_prep_value(self, value):
|
|
value = super(DateTimeField, self).get_prep_value(value)
|
|
value = self.to_python(value)
|
|
if value is not None and settings.USE_TZ and timezone.is_naive(value):
|
|
# For backwards compatibility, interpret naive datetimes in local
|
|
# time. This won't work during DST change, but we can't do much
|
|
# about it, so we let the exceptions percolate up the call stack.
|
|
warnings.warn("DateTimeField received a naive datetime (%s)"
|
|
" while time zone support is active." % value,
|
|
RuntimeWarning)
|
|
default_timezone = timezone.get_default_timezone()
|
|
value = timezone.make_aware(value, default_timezone)
|
|
return value
|
|
|
|
def get_db_prep_value(self, value, connection, prepared=False):
|
|
# Casts datetimes into the format expected by the backend
|
|
if not prepared:
|
|
value = self.get_prep_value(value)
|
|
return connection.ops.value_to_db_datetime(value)
|
|
|
|
def value_to_string(self, obj):
|
|
val = self._get_val_from_obj(obj)
|
|
return '' if val is None else val.isoformat()
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {'form_class': forms.DateTimeField}
|
|
defaults.update(kwargs)
|
|
return super(DateTimeField, self).formfield(**defaults)
|
|
|
|
|
|
class DecimalField(Field):
|
|
empty_strings_allowed = False
|
|
default_error_messages = {
|
|
'invalid': _("'%(value)s' value must be a decimal number."),
|
|
}
|
|
description = _("Decimal number")
|
|
|
|
def __init__(self, verbose_name=None, name=None, max_digits=None,
|
|
decimal_places=None, **kwargs):
|
|
self.max_digits, self.decimal_places = max_digits, decimal_places
|
|
Field.__init__(self, verbose_name, name, **kwargs)
|
|
|
|
def deconstruct(self):
|
|
name, path, args, kwargs = super(DecimalField, self).deconstruct()
|
|
if self.max_digits:
|
|
kwargs['max_digits'] = self.max_digits
|
|
if self.decimal_places:
|
|
kwargs['decimal_places'] = self.decimal_places
|
|
return name, path, args, kwargs
|
|
|
|
def get_internal_type(self):
|
|
return "DecimalField"
|
|
|
|
def to_python(self, value):
|
|
if value is None:
|
|
return value
|
|
try:
|
|
return decimal.Decimal(value)
|
|
except decimal.InvalidOperation:
|
|
raise exceptions.ValidationError(
|
|
self.error_messages['invalid'],
|
|
code='invalid',
|
|
params={'value': value},
|
|
)
|
|
|
|
def _format(self, value):
|
|
if isinstance(value, six.string_types) or value is None:
|
|
return value
|
|
else:
|
|
return self.format_number(value)
|
|
|
|
def format_number(self, value):
|
|
"""
|
|
Formats a number into a string with the requisite number of digits and
|
|
decimal places.
|
|
"""
|
|
# Method moved to django.db.backends.util.
|
|
#
|
|
# It is preserved because it is used by the oracle backend
|
|
# (django.db.backends.oracle.query), and also for
|
|
# backwards-compatibility with any external code which may have used
|
|
# this method.
|
|
from django.db.backends import util
|
|
return util.format_number(value, self.max_digits, self.decimal_places)
|
|
|
|
def get_db_prep_save(self, value, connection):
|
|
return connection.ops.value_to_db_decimal(self.to_python(value),
|
|
self.max_digits, self.decimal_places)
|
|
|
|
def get_prep_value(self, value):
|
|
value = super(DecimalField, self).get_prep_value(value)
|
|
return self.to_python(value)
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {
|
|
'max_digits': self.max_digits,
|
|
'decimal_places': self.decimal_places,
|
|
'form_class': forms.DecimalField,
|
|
}
|
|
defaults.update(kwargs)
|
|
return super(DecimalField, self).formfield(**defaults)
|
|
|
|
|
|
class EmailField(CharField):
|
|
default_validators = [validators.validate_email]
|
|
description = _("Email address")
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
# max_length should be overridden to 254 characters to be fully
|
|
# compliant with RFCs 3696 and 5321
|
|
|
|
kwargs['max_length'] = kwargs.get('max_length', 75)
|
|
CharField.__init__(self, *args, **kwargs)
|
|
|
|
def deconstruct(self):
|
|
name, path, args, kwargs = super(EmailField, self).deconstruct()
|
|
# We do not exclude max_length if it matches default as we want to change
|
|
# the default in future.
|
|
return name, path, args, kwargs
|
|
|
|
def formfield(self, **kwargs):
|
|
# As with CharField, this will cause email validation to be performed
|
|
# twice.
|
|
defaults = {
|
|
'form_class': forms.EmailField,
|
|
}
|
|
defaults.update(kwargs)
|
|
return super(EmailField, self).formfield(**defaults)
|
|
|
|
|
|
class FilePathField(Field):
|
|
description = _("File path")
|
|
|
|
def __init__(self, verbose_name=None, name=None, path='', match=None,
|
|
recursive=False, allow_files=True, allow_folders=False, **kwargs):
|
|
self.path, self.match, self.recursive = path, match, recursive
|
|
self.allow_files, self.allow_folders = allow_files, allow_folders
|
|
kwargs['max_length'] = kwargs.get('max_length', 100)
|
|
Field.__init__(self, verbose_name, name, **kwargs)
|
|
|
|
def deconstruct(self):
|
|
name, path, args, kwargs = super(FilePathField, self).deconstruct()
|
|
if self.path != '':
|
|
kwargs['path'] = self.path
|
|
if self.match is not None:
|
|
kwargs['match'] = self.match
|
|
if self.recursive is not False:
|
|
kwargs['recursive'] = self.recursive
|
|
if self.allow_files is not True:
|
|
kwargs['allow_files'] = self.allow_files
|
|
if self.allow_folders is not False:
|
|
kwargs['allow_folders'] = self.allow_folders
|
|
if kwargs.get("max_length", None) == 100:
|
|
del kwargs["max_length"]
|
|
return name, path, args, kwargs
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {
|
|
'path': self.path,
|
|
'match': self.match,
|
|
'recursive': self.recursive,
|
|
'form_class': forms.FilePathField,
|
|
'allow_files': self.allow_files,
|
|
'allow_folders': self.allow_folders,
|
|
}
|
|
defaults.update(kwargs)
|
|
return super(FilePathField, self).formfield(**defaults)
|
|
|
|
def get_internal_type(self):
|
|
return "FilePathField"
|
|
|
|
|
|
class FloatField(Field):
|
|
empty_strings_allowed = False
|
|
default_error_messages = {
|
|
'invalid': _("'%(value)s' value must be a float."),
|
|
}
|
|
description = _("Floating point number")
|
|
|
|
def get_prep_value(self, value):
|
|
value = super(FloatField, self).get_prep_value(value)
|
|
if value is None:
|
|
return None
|
|
return float(value)
|
|
|
|
def get_internal_type(self):
|
|
return "FloatField"
|
|
|
|
def to_python(self, value):
|
|
if value is None:
|
|
return value
|
|
try:
|
|
return float(value)
|
|
except (TypeError, ValueError):
|
|
raise exceptions.ValidationError(
|
|
self.error_messages['invalid'],
|
|
code='invalid',
|
|
params={'value': value},
|
|
)
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {'form_class': forms.FloatField}
|
|
defaults.update(kwargs)
|
|
return super(FloatField, self).formfield(**defaults)
|
|
|
|
|
|
class IntegerField(Field):
|
|
empty_strings_allowed = False
|
|
default_error_messages = {
|
|
'invalid': _("'%(value)s' value must be an integer."),
|
|
}
|
|
description = _("Integer")
|
|
|
|
def get_prep_value(self, value):
|
|
value = super(IntegerField, self).get_prep_value(value)
|
|
if value is None:
|
|
return None
|
|
return int(value)
|
|
|
|
def get_prep_lookup(self, lookup_type, value):
|
|
if ((lookup_type == 'gte' or lookup_type == 'lt')
|
|
and isinstance(value, float)):
|
|
value = math.ceil(value)
|
|
return super(IntegerField, self).get_prep_lookup(lookup_type, value)
|
|
|
|
def get_internal_type(self):
|
|
return "IntegerField"
|
|
|
|
def to_python(self, value):
|
|
if value is None:
|
|
return value
|
|
try:
|
|
return int(value)
|
|
except (TypeError, ValueError):
|
|
raise exceptions.ValidationError(
|
|
self.error_messages['invalid'],
|
|
code='invalid',
|
|
params={'value': value},
|
|
)
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {'form_class': forms.IntegerField}
|
|
defaults.update(kwargs)
|
|
return super(IntegerField, self).formfield(**defaults)
|
|
|
|
|
|
class BigIntegerField(IntegerField):
|
|
empty_strings_allowed = False
|
|
description = _("Big (8 byte) integer")
|
|
MAX_BIGINT = 9223372036854775807
|
|
|
|
def get_internal_type(self):
|
|
return "BigIntegerField"
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {'min_value': -BigIntegerField.MAX_BIGINT - 1,
|
|
'max_value': BigIntegerField.MAX_BIGINT}
|
|
defaults.update(kwargs)
|
|
return super(BigIntegerField, self).formfield(**defaults)
|
|
|
|
|
|
class IPAddressField(Field):
|
|
empty_strings_allowed = False
|
|
description = _("IPv4 address")
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
kwargs['max_length'] = 15
|
|
Field.__init__(self, *args, **kwargs)
|
|
|
|
def deconstruct(self):
|
|
name, path, args, kwargs = super(IPAddressField, self).deconstruct()
|
|
del kwargs['max_length']
|
|
return name, path, args, kwargs
|
|
|
|
def get_internal_type(self):
|
|
return "IPAddressField"
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {'form_class': forms.IPAddressField}
|
|
defaults.update(kwargs)
|
|
return super(IPAddressField, self).formfield(**defaults)
|
|
|
|
|
|
class GenericIPAddressField(Field):
|
|
empty_strings_allowed = True
|
|
description = _("IP address")
|
|
default_error_messages = {}
|
|
|
|
def __init__(self, verbose_name=None, name=None, protocol='both',
|
|
unpack_ipv4=False, *args, **kwargs):
|
|
self.unpack_ipv4 = unpack_ipv4
|
|
self.protocol = protocol
|
|
self.default_validators, invalid_error_message = \
|
|
validators.ip_address_validators(protocol, unpack_ipv4)
|
|
self.default_error_messages['invalid'] = invalid_error_message
|
|
kwargs['max_length'] = 39
|
|
Field.__init__(self, verbose_name, name, *args, **kwargs)
|
|
|
|
def deconstruct(self):
|
|
name, path, args, kwargs = super(GenericIPAddressField, self).deconstruct()
|
|
if self.unpack_ipv4 is not False:
|
|
kwargs['unpack_ipv4'] = self.unpack_ipv4
|
|
if self.protocol != "both":
|
|
kwargs['protocol'] = self.protocol
|
|
if kwargs.get("max_length", None) == 39:
|
|
del kwargs['max_length']
|
|
return name, path, args, kwargs
|
|
|
|
def get_internal_type(self):
|
|
return "GenericIPAddressField"
|
|
|
|
def to_python(self, value):
|
|
if value and ':' in value:
|
|
return clean_ipv6_address(value,
|
|
self.unpack_ipv4, self.error_messages['invalid'])
|
|
return value
|
|
|
|
def get_db_prep_value(self, value, connection, prepared=False):
|
|
if not prepared:
|
|
value = self.get_prep_value(value)
|
|
return value or None
|
|
|
|
def get_prep_value(self, value):
|
|
value = super(GenericIPAddressField, self).get_prep_value(value)
|
|
if value and ':' in value:
|
|
try:
|
|
return clean_ipv6_address(value, self.unpack_ipv4)
|
|
except exceptions.ValidationError:
|
|
pass
|
|
return value
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {
|
|
'protocol': self.protocol,
|
|
'form_class': forms.GenericIPAddressField,
|
|
}
|
|
defaults.update(kwargs)
|
|
return super(GenericIPAddressField, self).formfield(**defaults)
|
|
|
|
|
|
class NullBooleanField(Field):
|
|
empty_strings_allowed = False
|
|
default_error_messages = {
|
|
'invalid': _("'%(value)s' value must be either None, True or False."),
|
|
}
|
|
description = _("Boolean (Either True, False or None)")
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
kwargs['null'] = True
|
|
kwargs['blank'] = True
|
|
Field.__init__(self, *args, **kwargs)
|
|
|
|
def deconstruct(self):
|
|
name, path, args, kwargs = super(NullBooleanField, self).deconstruct()
|
|
del kwargs['null']
|
|
del kwargs['blank']
|
|
return name, path, args, kwargs
|
|
|
|
def get_internal_type(self):
|
|
return "NullBooleanField"
|
|
|
|
def to_python(self, value):
|
|
if value is None:
|
|
return None
|
|
if value in (True, False):
|
|
return bool(value)
|
|
if value in ('None',):
|
|
return None
|
|
if value in ('t', 'True', '1'):
|
|
return True
|
|
if value in ('f', 'False', '0'):
|
|
return False
|
|
raise exceptions.ValidationError(
|
|
self.error_messages['invalid'],
|
|
code='invalid',
|
|
params={'value': value},
|
|
)
|
|
|
|
def get_prep_lookup(self, lookup_type, value):
|
|
# Special-case handling for filters coming from a Web request (e.g. the
|
|
# admin interface). Only works for scalar values (not lists). If you're
|
|
# passing in a list, you might as well make things the right type when
|
|
# constructing the list.
|
|
if value in ('1', '0'):
|
|
value = bool(int(value))
|
|
return super(NullBooleanField, self).get_prep_lookup(lookup_type,
|
|
value)
|
|
|
|
def get_prep_value(self, value):
|
|
value = super(NullBooleanField, self).get_prep_value(value)
|
|
if value is None:
|
|
return None
|
|
return bool(value)
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {
|
|
'form_class': forms.NullBooleanField,
|
|
'required': not self.blank,
|
|
'label': capfirst(self.verbose_name),
|
|
'help_text': self.help_text}
|
|
defaults.update(kwargs)
|
|
return super(NullBooleanField, self).formfield(**defaults)
|
|
|
|
|
|
class PositiveIntegerField(IntegerField):
|
|
description = _("Positive integer")
|
|
|
|
def get_internal_type(self):
|
|
return "PositiveIntegerField"
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {'min_value': 0}
|
|
defaults.update(kwargs)
|
|
return super(PositiveIntegerField, self).formfield(**defaults)
|
|
|
|
|
|
class PositiveSmallIntegerField(IntegerField):
|
|
description = _("Positive small integer")
|
|
|
|
def get_internal_type(self):
|
|
return "PositiveSmallIntegerField"
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {'min_value': 0}
|
|
defaults.update(kwargs)
|
|
return super(PositiveSmallIntegerField, self).formfield(**defaults)
|
|
|
|
|
|
class SlugField(CharField):
|
|
default_validators = [validators.validate_slug]
|
|
description = _("Slug (up to %(max_length)s)")
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
kwargs['max_length'] = kwargs.get('max_length', 50)
|
|
# Set db_index=True unless it's been set manually.
|
|
if 'db_index' not in kwargs:
|
|
kwargs['db_index'] = True
|
|
super(SlugField, self).__init__(*args, **kwargs)
|
|
|
|
def deconstruct(self):
|
|
name, path, args, kwargs = super(SlugField, self).deconstruct()
|
|
if kwargs.get("max_length", None) == 50:
|
|
del kwargs['max_length']
|
|
if self.db_index is False:
|
|
kwargs['db_index'] = False
|
|
else:
|
|
del kwargs['db_index']
|
|
return name, path, args, kwargs
|
|
|
|
def get_internal_type(self):
|
|
return "SlugField"
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {'form_class': forms.SlugField}
|
|
defaults.update(kwargs)
|
|
return super(SlugField, self).formfield(**defaults)
|
|
|
|
|
|
class SmallIntegerField(IntegerField):
|
|
description = _("Small integer")
|
|
|
|
def get_internal_type(self):
|
|
return "SmallIntegerField"
|
|
|
|
|
|
class TextField(Field):
|
|
description = _("Text")
|
|
|
|
def get_internal_type(self):
|
|
return "TextField"
|
|
|
|
def get_prep_value(self, value):
|
|
value = super(TextField, self).get_prep_value(value)
|
|
if isinstance(value, six.string_types) or value is None:
|
|
return value
|
|
return smart_text(value)
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {'widget': forms.Textarea}
|
|
defaults.update(kwargs)
|
|
return super(TextField, self).formfield(**defaults)
|
|
|
|
|
|
class TimeField(Field):
|
|
empty_strings_allowed = False
|
|
default_error_messages = {
|
|
'invalid': _("'%(value)s' value has an invalid format. It must be in "
|
|
"HH:MM[:ss[.uuuuuu]] format."),
|
|
'invalid_time': _("'%(value)s' value has the correct format "
|
|
"(HH:MM[:ss[.uuuuuu]]) but it is an invalid time."),
|
|
}
|
|
description = _("Time")
|
|
|
|
def __init__(self, verbose_name=None, name=None, auto_now=False,
|
|
auto_now_add=False, **kwargs):
|
|
self.auto_now, self.auto_now_add = auto_now, auto_now_add
|
|
if auto_now or auto_now_add:
|
|
kwargs['editable'] = False
|
|
kwargs['blank'] = True
|
|
Field.__init__(self, verbose_name, name, **kwargs)
|
|
|
|
def deconstruct(self):
|
|
name, path, args, kwargs = super(TimeField, self).deconstruct()
|
|
if self.auto_now is not False:
|
|
kwargs["auto_now"] = self.auto_now
|
|
if self.auto_now_add is not False:
|
|
kwargs["auto_now_add"] = self.auto_now_add
|
|
return name, path, args, kwargs
|
|
|
|
def get_internal_type(self):
|
|
return "TimeField"
|
|
|
|
def to_python(self, value):
|
|
if value is None:
|
|
return None
|
|
if isinstance(value, datetime.time):
|
|
return value
|
|
if isinstance(value, datetime.datetime):
|
|
# Not usually a good idea to pass in a datetime here (it loses
|
|
# information), but this can be a side-effect of interacting with a
|
|
# database backend (e.g. Oracle), so we'll be accommodating.
|
|
return value.time()
|
|
|
|
try:
|
|
parsed = parse_time(value)
|
|
if parsed is not None:
|
|
return parsed
|
|
except ValueError:
|
|
raise exceptions.ValidationError(
|
|
self.error_messages['invalid_time'],
|
|
code='invalid_time',
|
|
params={'value': value},
|
|
)
|
|
|
|
raise exceptions.ValidationError(
|
|
self.error_messages['invalid'],
|
|
code='invalid',
|
|
params={'value': value},
|
|
)
|
|
|
|
def pre_save(self, model_instance, add):
|
|
if self.auto_now or (self.auto_now_add and add):
|
|
value = datetime.datetime.now().time()
|
|
setattr(model_instance, self.attname, value)
|
|
return value
|
|
else:
|
|
return super(TimeField, self).pre_save(model_instance, add)
|
|
|
|
def get_prep_value(self, value):
|
|
value = super(TimeField, self).get_prep_value(value)
|
|
return self.to_python(value)
|
|
|
|
def get_db_prep_value(self, value, connection, prepared=False):
|
|
# Casts times into the format expected by the backend
|
|
if not prepared:
|
|
value = self.get_prep_value(value)
|
|
return connection.ops.value_to_db_time(value)
|
|
|
|
def value_to_string(self, obj):
|
|
val = self._get_val_from_obj(obj)
|
|
return '' if val is None else val.isoformat()
|
|
|
|
def formfield(self, **kwargs):
|
|
defaults = {'form_class': forms.TimeField}
|
|
defaults.update(kwargs)
|
|
return super(TimeField, self).formfield(**defaults)
|
|
|
|
|
|
class URLField(CharField):
|
|
default_validators = [validators.URLValidator()]
|
|
description = _("URL")
|
|
|
|
def __init__(self, verbose_name=None, name=None, **kwargs):
|
|
kwargs['max_length'] = kwargs.get('max_length', 200)
|
|
CharField.__init__(self, verbose_name, name, **kwargs)
|
|
|
|
def deconstruct(self):
|
|
name, path, args, kwargs = super(URLField, self).deconstruct()
|
|
if kwargs.get("max_length", None) == 200:
|
|
del kwargs['max_length']
|
|
return name, path, args, kwargs
|
|
|
|
def formfield(self, **kwargs):
|
|
# As with CharField, this will cause URL validation to be performed
|
|
# twice.
|
|
defaults = {
|
|
'form_class': forms.URLField,
|
|
}
|
|
defaults.update(kwargs)
|
|
return super(URLField, self).formfield(**defaults)
|
|
|
|
|
|
class BinaryField(Field):
|
|
description = _("Raw binary data")
|
|
empty_values = [None, b'']
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
kwargs['editable'] = False
|
|
super(BinaryField, self).__init__(*args, **kwargs)
|
|
if self.max_length is not None:
|
|
self.validators.append(validators.MaxLengthValidator(self.max_length))
|
|
|
|
def get_internal_type(self):
|
|
return "BinaryField"
|
|
|
|
def get_default(self):
|
|
if self.has_default() and not callable(self.default):
|
|
return self.default
|
|
default = super(BinaryField, self).get_default()
|
|
if default == '':
|
|
return b''
|
|
return default
|
|
|
|
def get_db_prep_value(self, value, connection, prepared=False):
|
|
value = super(BinaryField, self
|
|
).get_db_prep_value(value, connection, prepared)
|
|
if value is not None:
|
|
return connection.Database.Binary(value)
|
|
return value
|
|
|
|
def value_to_string(self, obj):
|
|
"""Binary data is serialized as base64"""
|
|
return b64encode(force_bytes(self._get_val_from_obj(obj))).decode('ascii')
|
|
|
|
def to_python(self, value):
|
|
# If it's a string, it should be base64-encoded data
|
|
if isinstance(value, six.text_type):
|
|
return six.memoryview(b64decode(force_bytes(value)))
|
|
return value
|