import copy import datetime import decimal import math import warnings from itertools import tee from django.db import connection from django.db.models.query_utils import QueryWrapper from django.conf import settings from django import forms from django.core import exceptions, validators from django.utils.datastructures import DictWrapper from django.utils.dateparse import parse_date, parse_datetime, parse_time from django.utils.functional import curry from django.utils.text import capfirst from django.utils import timezone from django.utils.translation import ugettext_lazy as _ from django.utils.encoding import smart_unicode, force_unicode, smart_str from django.utils.ipv6 import clean_ipv6_address class NOT_PROVIDED: pass # The values to use for "blank" in SelectFields. Will be appended to the start # of most "choices" lists. BLANK_CHOICE_DASH = [("", "---------")] BLANK_CHOICE_NONE = [("", "None")] class FieldDoesNotExist(Exception): pass # A guide to Field parameters: # # * name: The name of the field specifed in the model. # * attname: The attribute to use on the model object. This is the same as # "name", except in the case of ForeignKeys, where "_id" is # appended. # * db_column: The db_column specified in the model (or None). # * column: The database column for this field. This is the same as # "attname", except if db_column is specified. # # Code that introspects values, or does other dynamic things, should use # attname. For example, this gets the primary key value of object "obj": # # getattr(obj, opts.pk.attname) class Field(object): """Base class for all field types""" # Designates whether empty strings fundamentally are allowed at the # database level. empty_strings_allowed = True # These track each time a Field instance is created. Used to retain order. # The auto_creation_counter is used for fields that Django implicitly # creates, creation_counter is used for all user-specified fields. creation_counter = 0 auto_creation_counter = -1 default_validators = [] # Default set of validators default_error_messages = { 'invalid_choice': _(u'Value %r is not a valid choice.'), 'null': _(u'This field cannot be null.'), 'blank': _(u'This field cannot be blank.'), 'unique': _(u'%(model_name)s with this %(field_label)s ' u'already exists.'), } # Generic field type description, usually overriden by subclasses def _description(self): return _(u'Field of type: %(field_type)s') % { 'field_type': self.__class__.__name__ } description = property(_description) def __init__(self, verbose_name=None, name=None, primary_key=False, max_length=None, unique=False, blank=False, null=False, db_index=False, rel=None, default=NOT_PROVIDED, editable=True, serialize=True, unique_for_date=None, unique_for_month=None, unique_for_year=None, choices=None, help_text='', db_column=None, db_tablespace=None, auto_created=False, validators=[], error_messages=None): self.name = name self.verbose_name = verbose_name self.primary_key = primary_key self.max_length, self._unique = max_length, unique self.blank, self.null = blank, null # Oracle treats the empty string ('') as null, so coerce the null # option whenever '' is a possible value. if (self.empty_strings_allowed and connection.features.interprets_empty_strings_as_nulls): self.null = True self.rel = rel self.default = default self.editable = editable self.serialize = serialize self.unique_for_date, self.unique_for_month = (unique_for_date, unique_for_month) self.unique_for_year = unique_for_year self._choices = choices or [] self.help_text = help_text self.db_column = db_column self.db_tablespace = db_tablespace or settings.DEFAULT_INDEX_TABLESPACE self.auto_created = auto_created # Set db_index to True if the field has a relationship and doesn't # explicitly set db_index. self.db_index = db_index # Adjust the appropriate creation counter, and save our local copy. if auto_created: self.creation_counter = Field.auto_creation_counter Field.auto_creation_counter -= 1 else: self.creation_counter = Field.creation_counter Field.creation_counter += 1 self.validators = self.default_validators + validators messages = {} for c in reversed(self.__class__.__mro__): messages.update(getattr(c, 'default_error_messages', {})) messages.update(error_messages or {}) self.error_messages = messages def __cmp__(self, other): # This is needed because bisect does not take a comparison function. return cmp(self.creation_counter, other.creation_counter) def __deepcopy__(self, memodict): # We don't have to deepcopy very much here, since most things are not # intended to be altered after initial creation. obj = copy.copy(self) if self.rel: obj.rel = copy.copy(self.rel) memodict[id(self)] = obj return obj def to_python(self, value): """ Converts the input value into the expected Python data type, raising django.core.exceptions.ValidationError if the data can't be converted. Returns the converted value. Subclasses should override this. """ return value def run_validators(self, value): if value in validators.EMPTY_VALUES: return errors = [] for v in self.validators: try: v(value) except exceptions.ValidationError, e: if hasattr(e, 'code') and e.code in self.error_messages: message = self.error_messages[e.code] if e.params: message = message % e.params errors.append(message) else: errors.extend(e.messages) if errors: raise exceptions.ValidationError(errors) def validate(self, value, model_instance): """ Validates value and throws ValidationError. Subclasses should override this to provide validation logic. """ if not self.editable: # Skip validation for non-editable fields. return if self._choices and value: for option_key, option_value in self.choices: if isinstance(option_value, (list, tuple)): # This is an optgroup, so look inside the group for # options. for optgroup_key, optgroup_value in option_value: if value == optgroup_key: return elif value == option_key: return msg = self.error_messages['invalid_choice'] % value raise exceptions.ValidationError(msg) if value is None and not self.null: raise exceptions.ValidationError(self.error_messages['null']) if not self.blank and value in validators.EMPTY_VALUES: raise exceptions.ValidationError(self.error_messages['blank']) def clean(self, value, model_instance): """ Convert the value's type and run validation. Validation errors from to_python and validate are propagated. The correct value is returned if no error is raised. """ value = self.to_python(value) self.validate(value, model_instance) self.run_validators(value) return value def db_type(self, connection): """ Returns the database column data type for this field, for the provided connection. """ # The default implementation of this method looks at the # backend-specific DATA_TYPES dictionary, looking up the field by its # "internal type". # # A Field class can implement the get_internal_type() method to specify # which *preexisting* Django Field class it's most similar to -- i.e., # a custom field might be represented by a TEXT column type, which is # the same as the TextField Django field type, which means the custom # field's get_internal_type() returns 'TextField'. # # But the limitation of the get_internal_type() / data_types approach # is that it cannot handle database column types that aren't already # mapped to one of the built-in Django field types. In this case, you # can implement db_type() instead of get_internal_type() to specify # exactly which wacky database column type you want to use. data = DictWrapper(self.__dict__, connection.ops.quote_name, "qn_") try: return (connection.creation.data_types[self.get_internal_type()] % data) except KeyError: return None @property def unique(self): return self._unique or self.primary_key def set_attributes_from_name(self, name): if not self.name: self.name = name self.attname, self.column = self.get_attname_column() if self.verbose_name is None and self.name: self.verbose_name = self.name.replace('_', ' ') def contribute_to_class(self, cls, name): self.set_attributes_from_name(name) self.model = cls cls._meta.add_field(self) if self.choices: setattr(cls, 'get_%s_display' % self.name, curry(cls._get_FIELD_display, field=self)) def get_attname(self): return self.name def get_attname_column(self): attname = self.get_attname() column = self.db_column or attname return attname, column def get_cache_name(self): return '_%s_cache' % self.name def get_internal_type(self): return self.__class__.__name__ def pre_save(self, model_instance, add): """ Returns field's value just before saving. """ return getattr(model_instance, self.attname) def get_prep_value(self, value): """ Perform preliminary non-db specific value checks and conversions. """ return value def get_db_prep_value(self, value, connection, prepared=False): """Returns field's value prepared for interacting with the database backend. Used by the default implementations of ``get_db_prep_save``and `get_db_prep_lookup``` """ if not prepared: value = self.get_prep_value(value) return value def get_db_prep_save(self, value, connection): """ Returns field's value prepared for saving into a database. """ return self.get_db_prep_value(value, connection=connection, prepared=False) def get_prep_lookup(self, lookup_type, value): """ Perform preliminary non-db specific lookup checks and conversions """ if hasattr(value, 'prepare'): return value.prepare() if hasattr(value, '_prepare'): return value._prepare() if lookup_type in ( 'regex', 'iregex', 'month', 'day', 'week_day', 'search', 'contains', 'icontains', 'iexact', 'startswith', 'istartswith', 'endswith', 'iendswith', 'isnull' ): return value elif lookup_type in ('exact', 'gt', 'gte', 'lt', 'lte'): return self.get_prep_value(value) elif lookup_type in ('range', 'in'): return [self.get_prep_value(v) for v in value] elif lookup_type == 'year': try: return int(value) except ValueError: raise ValueError("The __year lookup type requires an integer " "argument") raise TypeError("Field has invalid lookup: %s" % lookup_type) def get_db_prep_lookup(self, lookup_type, value, connection, prepared=False): """ Returns field's value prepared for database lookup. """ if not prepared: value = self.get_prep_lookup(lookup_type, value) if hasattr(value, 'get_compiler'): value = value.get_compiler(connection=connection) if hasattr(value, 'as_sql') or hasattr(value, '_as_sql'): # If the value has a relabel_aliases method, it will need to # be invoked before the final SQL is evaluated if hasattr(value, 'relabel_aliases'): return value if hasattr(value, 'as_sql'): sql, params = value.as_sql() else: sql, params = value._as_sql(connection=connection) return QueryWrapper(('(%s)' % sql), params) if lookup_type in ('regex', 'iregex', 'month', 'day', 'week_day', 'search'): return [value] elif lookup_type in ('exact', 'gt', 'gte', 'lt', 'lte'): return [self.get_db_prep_value(value, connection=connection, prepared=prepared)] elif lookup_type in ('range', 'in'): return [self.get_db_prep_value(v, connection=connection, prepared=prepared) for v in value] 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 self.get_internal_type() == 'DateField': return connection.ops.year_lookup_bounds_for_date_field(value) else: return connection.ops.year_lookup_bounds(value) 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_unicode(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.""" first_choice = include_blank and blank_choice or [] 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_unicode(x)) for x in rel_model._default_manager.complex_filter( self.rel.limit_choices_to)] else: lst = [(x._get_pk_val(), smart_unicode(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 = include_blank and blank_choice or [] 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_unicode(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 hasattr(self._choices, 'next'): 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=forms.CharField, **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 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 kwargs.keys(): 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) 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': _(u"'%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 get_internal_type(self): return "AutoField" def to_python(self, value): if value is None: return value try: return int(value) except (TypeError, ValueError): msg = self.error_messages['invalid'] % str(value) raise exceptions.ValidationError(msg) def validate(self, value, model_instance): pass def get_prep_value(self, 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': _(u"'%s' value must be either True or False."), } description = _("Boolean (Either True or False)") def __init__(self, *args, **kwargs): kwargs['blank'] = True if 'default' not in kwargs and not kwargs.get('null'): kwargs['default'] = False Field.__init__(self, *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 msg = self.error_messages['invalid'] % str(value) raise exceptions.ValidationError(msg) 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): 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, basestring) or value is None: return value return smart_unicode(value) def get_prep_value(self, 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': _(u'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': _(u"'%s' value has an invalid date format. It must be " u"in YYYY-MM-DD format."), 'invalid_date': _(u"'%s' value has the correct format (YYYY-MM-DD) " u"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 get_internal_type(self): return "DateField" def to_python(self, value): if value is None: return value if isinstance(value, datetime.datetime): return value.date() if isinstance(value, datetime.date): return value value = smart_str(value) try: parsed = parse_date(value) if parsed is not None: return parsed except ValueError: msg = self.error_messages['invalid_date'] % value raise exceptions.ValidationError(msg) msg = self.error_messages['invalid'] % value raise exceptions.ValidationError(msg) 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 "__month", "__day", and "__week_day" lookups, convert the value # to an int so the database backend always sees a consistent type. if lookup_type in ('month', 'day', 'week_day'): return int(value) return super(DateField, self).get_prep_lookup(lookup_type, value) def get_prep_value(self, 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': _(u"'%s' value has an invalid format. It must be in " u"YYYY-MM-DD HH:MM[:ss[.uuuuuu]][TZ] format."), 'invalid_date': _(u"'%s' value has the correct format " u"(YYYY-MM-DD) but it is an invalid date."), 'invalid_datetime': _(u"'%s' value has the correct format " u"(YYYY-MM-DD HH:MM[:ss[.uuuuuu]][TZ]) " u"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: default_timezone = timezone.get_default_timezone() value = timezone.make_aware(value, default_timezone) return value value = smart_str(value) try: parsed = parse_datetime(value) if parsed is not None: return parsed except ValueError: msg = self.error_messages['invalid_datetime'] % value raise exceptions.ValidationError(msg) try: parsed = parse_date(value) if parsed is not None: return datetime.datetime(parsed.year, parsed.month, parsed.day) except ValueError: msg = self.error_messages['invalid_date'] % value raise exceptions.ValidationError(msg) msg = self.error_messages['invalid'] % value raise exceptions.ValidationError(msg) 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 = 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(u"DateTimeField received a naive datetime (%s)" u" 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': _(u"'%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 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: msg = self.error_messages['invalid'] % str(value) raise exceptions.ValidationError(msg) def _format(self, value): if isinstance(value, basestring) 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): 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 = _("E-mail address") def __init__(self, *args, **kwargs): kwargs['max_length'] = kwargs.get('max_length', 75) CharField.__init__(self, *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, **kwargs): self.path, self.match, self.recursive = path, match, recursive kwargs['max_length'] = kwargs.get('max_length', 100) Field.__init__(self, verbose_name, name, **kwargs) def formfield(self, **kwargs): defaults = { 'path': self.path, 'match': self.match, 'recursive': self.recursive, 'form_class': forms.FilePathField, } 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': _("'%s' value must be a float."), } description = _("Floating point number") def get_prep_value(self, 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): msg = self.error_messages['invalid'] % str(value) raise exceptions.ValidationError(msg) 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': _("'%s' value must be an integer."), } description = _("Integer") def get_prep_value(self, 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): msg = self.error_messages['invalid'] % str(value) raise exceptions.ValidationError(msg) 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 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, protocol='both', unpack_ipv4=False, *args, **kwargs): self.unpack_ipv4 = unpack_ipv4 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, *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): 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 = {'form_class': forms.GenericIPAddressField} defaults.update(kwargs) return super(GenericIPAddressField, self).formfield(**defaults) class NullBooleanField(Field): empty_strings_allowed = False default_error_messages = { 'invalid': _("'%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 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 msg = self.error_messages['invalid'] % str(value) raise exceptions.ValidationError(msg) 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): 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 = _("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 = _("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): description = _("String (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 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 = _("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): if isinstance(value, basestring) or value is None: return value return smart_unicode(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': _(u"'%s' value has an invalid format. It must be in " u"HH:MM[:ss[.uuuuuu]] format."), 'invalid_time': _(u"'%s' value has the correct format " u"(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 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() value = smart_str(value) try: parsed = parse_time(value) if parsed is not None: return parsed except ValueError: msg = self.error_messages['invalid_time'] % value raise exceptions.ValidationError(msg) msg = self.error_messages['invalid'] % value raise exceptions.ValidationError(msg) 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): 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): description = _("URL") def __init__(self, verbose_name=None, name=None, verify_exists=False, **kwargs): kwargs['max_length'] = kwargs.get('max_length', 200) CharField.__init__(self, verbose_name, name, **kwargs) self.validators.append( validators.URLValidator(verify_exists=verify_exists)) 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)