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Refs #25294 -- Moved BoundField to django.forms.boundfield.

This commit is contained in:
Moritz Sichert 2015-09-09 15:09:59 +02:00 committed by Tim Graham
parent 0603f09318
commit 8550161e53
7 changed files with 245 additions and 227 deletions
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2
django/contrib/admin/utils.py
View File

@ -11,7 +11,7 @@ from django.db import models
from django.db.models.constants import LOOKUP_SEP
from django.db.models.deletion import Collector
from django.db.models.sql.constants import QUERY_TERMS
from django.forms.forms import pretty_name
from django.forms.utils import pretty_name
from django.utils import formats, six, timezone
from django.utils.encoding import force_str, force_text, smart_text
from django.utils.html import format_html

1
django/forms/__init__.py
View File

@ -3,6 +3,7 @@ Django validation and HTML form handling.
"""
from django.core.exceptions import ValidationError # NOQA
from django.forms.boundfield import * # NOQA
from django.forms.fields import * # NOQA
from django.forms.forms import * # NOQA
from django.forms.formsets import * # NOQA

227
django/forms/boundfield.py Normal file
View File

@ -0,0 +1,227 @@
from __future__ import unicode_literals
import datetime
from django.forms.utils import flatatt, pretty_name
from django.forms.widgets import Textarea, TextInput
from django.utils import six
from django.utils.encoding import (
force_text, python_2_unicode_compatible, smart_text,
)
from django.utils.html import conditional_escape, format_html, html_safe
from django.utils.safestring import mark_safe
from django.utils.translation import ugettext_lazy as _
__all__ = ('BoundField',)
UNSET = object()
@html_safe
@python_2_unicode_compatible
class BoundField(object):
"A Field plus data"
def __init__(self, form, field, name):
self.form = form
self.field = field
self.name = name
self.html_name = form.add_prefix(name)
self.html_initial_name = form.add_initial_prefix(name)
self.html_initial_id = form.add_initial_prefix(self.auto_id)
if self.field.label is None:
self.label = pretty_name(name)
else:
self.label = self.field.label
self.help_text = field.help_text or ''
self._initial_value = UNSET
def __str__(self):
"""Renders this field as an HTML widget."""
if self.field.show_hidden_initial:
return self.as_widget() + self.as_hidden(only_initial=True)
return self.as_widget()
def __iter__(self):
"""
Yields rendered strings that comprise all widgets in this BoundField.
This really is only useful for RadioSelect widgets, so that you can
iterate over individual radio buttons in a template.
"""
id_ = self.field.widget.attrs.get('id') or self.auto_id
attrs = {'id': id_} if id_ else {}
for subwidget in self.field.widget.subwidgets(self.html_name, self.value(), attrs):
yield subwidget
def __len__(self):
return len(list(self.__iter__()))
def __getitem__(self, idx):
# Prevent unnecessary reevaluation when accessing BoundField's attrs
# from templates.
if not isinstance(idx, six.integer_types):
raise TypeError
return list(self.__iter__())[idx]
@property
def errors(self):
"""
Returns an ErrorList for this field. Returns an empty ErrorList
if there are none.
"""
return self.form.errors.get(self.name, self.form.error_class())
def as_widget(self, widget=None, attrs=None, only_initial=False):
"""
Renders the field by rendering the passed widget, adding any HTML
attributes passed as attrs. If no widget is specified, then the
field's default widget will be used.
"""
if not widget:
widget = self.field.widget
if self.field.localize:
widget.is_localized = True
attrs = attrs or {}
if self.field.disabled:
attrs['disabled'] = True
auto_id = self.auto_id
if auto_id and 'id' not in attrs and 'id' not in widget.attrs:
if not only_initial:
attrs['id'] = auto_id
else:
attrs['id'] = self.html_initial_id
if not only_initial:
name = self.html_name
else:
name = self.html_initial_name
return force_text(widget.render(name, self.value(), attrs=attrs))
def as_text(self, attrs=None, **kwargs):
"""
Returns a string of HTML for representing this as an <input type="text">.
"""
return self.as_widget(TextInput(), attrs, **kwargs)
def as_textarea(self, attrs=None, **kwargs):
"Returns a string of HTML for representing this as a <textarea>."
return self.as_widget(Textarea(), attrs, **kwargs)
def as_hidden(self, attrs=None, **kwargs):
"""
Returns a string of HTML for representing this as an <input type="hidden">.
"""
return self.as_widget(self.field.hidden_widget(), attrs, **kwargs)
@property
def data(self):
"""
Returns the data for this BoundField, or None if it wasn't given.
"""
return self.field.widget.value_from_datadict(self.form.data, self.form.files, self.html_name)
def value(self):
"""
Returns the value for this BoundField, using the initial value if
the form is not bound or the data otherwise.
"""
if not self.form.is_bound:
data = self.form.initial.get(self.name, self.field.initial)
if callable(data):
if self._initial_value is not UNSET:
data = self._initial_value
else:
data = data()
# If this is an auto-generated default date, nix the
# microseconds for standardized handling. See #22502.
if (isinstance(data, (datetime.datetime, datetime.time)) and
not self.field.widget.supports_microseconds):
data = data.replace(microsecond=0)
self._initial_value = data
else:
data = self.field.bound_data(
self.data, self.form.initial.get(self.name, self.field.initial)
)
return self.field.prepare_value(data)
def label_tag(self, contents=None, attrs=None, label_suffix=None):
"""
Wraps the given contents in a <label>, if the field has an ID attribute.
contents should be 'mark_safe'd to avoid HTML escaping. If contents
aren't given, uses the field's HTML-escaped label.
If attrs are given, they're used as HTML attributes on the <label> tag.
label_suffix allows overriding the form's label_suffix.
"""
contents = contents or self.label
if label_suffix is None:
label_suffix = (self.field.label_suffix if self.field.label_suffix is not None
else self.form.label_suffix)
# Only add the suffix if the label does not end in punctuation.
# Translators: If found as last label character, these punctuation
# characters will prevent the default label_suffix to be appended to the label
if label_suffix and contents and contents[-1] not in _(':?.!'):
contents = format_html('{}{}', contents, label_suffix)
widget = self.field.widget
id_ = widget.attrs.get('id') or self.auto_id
if id_:
id_for_label = widget.id_for_label(id_)
if id_for_label:
attrs = dict(attrs or {}, **{'for': id_for_label})
if self.field.required and hasattr(self.form, 'required_css_class'):
attrs = attrs or {}
if 'class' in attrs:
attrs['class'] += ' ' + self.form.required_css_class
else:
attrs['class'] = self.form.required_css_class
attrs = flatatt(attrs) if attrs else ''
contents = format_html('<label{}>{}</label>', attrs, contents)
else:
contents = conditional_escape(contents)
return mark_safe(contents)
def css_classes(self, extra_classes=None):
"""
Returns a string of space-separated CSS classes for this field.
"""
if hasattr(extra_classes, 'split'):
extra_classes = extra_classes.split()
extra_classes = set(extra_classes or [])
if self.errors and hasattr(self.form, 'error_css_class'):
extra_classes.add(self.form.error_css_class)
if self.field.required and hasattr(self.form, 'required_css_class'):
extra_classes.add(self.form.required_css_class)
return ' '.join(extra_classes)
@property
def is_hidden(self):
"Returns True if this BoundField's widget is hidden."
return self.field.widget.is_hidden
@property
def auto_id(self):
"""
Calculates and returns the ID attribute for this BoundField, if the
associated Form has specified auto_id. Returns an empty string otherwise.
"""
auto_id = self.form.auto_id
if auto_id and '%s' in smart_text(auto_id):
return smart_text(auto_id) % self.html_name
elif auto_id:
return self.html_name
return ''
@property
def id_for_label(self):
"""
Wrapper around the field widget's `id_for_label` method.
Useful, for example, for focusing on this field regardless of whether
it has a single widget or a MultiWidget.
"""
widget = self.field.widget
id_ = widget.attrs.get('id') or self.auto_id
return widget.id_for_label(id_)

2
django/forms/fields.py
View File

@ -18,6 +18,7 @@ from django.core import validators
from django.core.exceptions import ValidationError
# Provide this import for backwards compatibility.
from django.core.validators import EMPTY_VALUES # NOQA
from django.forms.boundfield import BoundField
from django.forms.utils import from_current_timezone, to_current_timezone
from django.forms.widgets import (
FILE_INPUT_CONTRADICTION, CheckboxInput, ClearableFileInput, DateInput,
@ -209,7 +210,6 @@ class Field(six.with_metaclass(RenameFieldMethods, object)):
Return a BoundField instance that will be used when accessing the form
field in a template.
"""
from django.forms.forms import BoundField
return BoundField(form, self, field_name)
def __deepcopy__(self, memo):

230
django/forms/forms.py
View File

@ -5,34 +5,23 @@ Form classes
from __future__ import unicode_literals
import copy
import datetime
from collections import OrderedDict
from django.core.exceptions import NON_FIELD_ERRORS, ValidationError
from django.forms.fields import Field, FileField
from django.forms.utils import ErrorDict, ErrorList, flatatt
from django.forms.widgets import Media, MediaDefiningClass, Textarea, TextInput
# pretty_name is imported for backwards compatibility in Django 1.9
from django.forms.utils import ErrorDict, ErrorList, pretty_name # NOQA
from django.forms.widgets import Media, MediaDefiningClass
from django.utils import six
from django.utils.encoding import (
force_text, python_2_unicode_compatible, smart_text,
)
from django.utils.encoding import force_text, python_2_unicode_compatible
from django.utils.functional import cached_property
from django.utils.html import conditional_escape, format_html, html_safe
from django.utils.html import conditional_escape, html_safe
from django.utils.safestring import mark_safe
from django.utils.translation import ugettext as _
__all__ = ('BaseForm', 'Form')
def pretty_name(name):
"""Converts 'first_name' to 'First name'"""
if not name:
return ''
return name.replace('_', ' ').capitalize()
UNSET = object()
class DeclarativeFieldsMetaclass(MediaDefiningClass):
"""
Metaclass that collects Fields declared on the base classes.
@ -491,212 +480,3 @@ class Form(six.with_metaclass(DeclarativeFieldsMetaclass, BaseForm)):
# fancy metaclass stuff purely for the semantic sugar -- it allows one
# to define a form using declarative syntax.
# BaseForm itself has no way of designating self.fields.
@html_safe
@python_2_unicode_compatible
class BoundField(object):
"A Field plus data"
def __init__(self, form, field, name):
self.form = form
self.field = field
self.name = name
self.html_name = form.add_prefix(name)
self.html_initial_name = form.add_initial_prefix(name)
self.html_initial_id = form.add_initial_prefix(self.auto_id)
if self.field.label is None:
self.label = pretty_name(name)
else:
self.label = self.field.label
self.help_text = field.help_text or ''
self._initial_value = UNSET
def __str__(self):
"""Renders this field as an HTML widget."""
if self.field.show_hidden_initial:
return self.as_widget() + self.as_hidden(only_initial=True)
return self.as_widget()
def __iter__(self):
"""
Yields rendered strings that comprise all widgets in this BoundField.
This really is only useful for RadioSelect widgets, so that you can
iterate over individual radio buttons in a template.
"""
id_ = self.field.widget.attrs.get('id') or self.auto_id
attrs = {'id': id_} if id_ else {}
for subwidget in self.field.widget.subwidgets(self.html_name, self.value(), attrs):
yield subwidget
def __len__(self):
return len(list(self.__iter__()))
def __getitem__(self, idx):
# Prevent unnecessary reevaluation when accessing BoundField's attrs
# from templates.
if not isinstance(idx, six.integer_types):
raise TypeError
return list(self.__iter__())[idx]
@property
def errors(self):
"""
Returns an ErrorList for this field. Returns an empty ErrorList
if there are none.
"""
return self.form.errors.get(self.name, self.form.error_class())
def as_widget(self, widget=None, attrs=None, only_initial=False):
"""
Renders the field by rendering the passed widget, adding any HTML
attributes passed as attrs. If no widget is specified, then the
field's default widget will be used.
"""
if not widget:
widget = self.field.widget
if self.field.localize:
widget.is_localized = True
attrs = attrs or {}
if self.field.disabled:
attrs['disabled'] = True
auto_id = self.auto_id
if auto_id and 'id' not in attrs and 'id' not in widget.attrs:
if not only_initial:
attrs['id'] = auto_id
else:
attrs['id'] = self.html_initial_id
if not only_initial:
name = self.html_name
else:
name = self.html_initial_name
return force_text(widget.render(name, self.value(), attrs=attrs))
def as_text(self, attrs=None, **kwargs):
"""
Returns a string of HTML for representing this as an <input type="text">.
"""
return self.as_widget(TextInput(), attrs, **kwargs)
def as_textarea(self, attrs=None, **kwargs):
"Returns a string of HTML for representing this as a <textarea>."
return self.as_widget(Textarea(), attrs, **kwargs)
def as_hidden(self, attrs=None, **kwargs):
"""
Returns a string of HTML for representing this as an <input type="hidden">.
"""
return self.as_widget(self.field.hidden_widget(), attrs, **kwargs)
@property
def data(self):
"""
Returns the data for this BoundField, or None if it wasn't given.
"""
return self.field.widget.value_from_datadict(self.form.data, self.form.files, self.html_name)
def value(self):
"""
Returns the value for this BoundField, using the initial value if
the form is not bound or the data otherwise.
"""
if not self.form.is_bound:
data = self.form.initial.get(self.name, self.field.initial)
if callable(data):
if self._initial_value is not UNSET:
data = self._initial_value
else:
data = data()
# If this is an auto-generated default date, nix the
# microseconds for standardized handling. See #22502.
if (isinstance(data, (datetime.datetime, datetime.time)) and
not self.field.widget.supports_microseconds):
data = data.replace(microsecond=0)
self._initial_value = data
else:
data = self.field.bound_data(
self.data, self.form.initial.get(self.name, self.field.initial)
)
return self.field.prepare_value(data)
def label_tag(self, contents=None, attrs=None, label_suffix=None):
"""
Wraps the given contents in a <label>, if the field has an ID attribute.
contents should be 'mark_safe'd to avoid HTML escaping. If contents
aren't given, uses the field's HTML-escaped label.
If attrs are given, they're used as HTML attributes on the <label> tag.
label_suffix allows overriding the form's label_suffix.
"""
contents = contents or self.label
if label_suffix is None:
label_suffix = (self.field.label_suffix if self.field.label_suffix is not None
else self.form.label_suffix)
# Only add the suffix if the label does not end in punctuation.
# Translators: If found as last label character, these punctuation
# characters will prevent the default label_suffix to be appended to the label
if label_suffix and contents and contents[-1] not in _(':?.!'):
contents = format_html('{}{}', contents, label_suffix)
widget = self.field.widget
id_ = widget.attrs.get('id') or self.auto_id
if id_:
id_for_label = widget.id_for_label(id_)
if id_for_label:
attrs = dict(attrs or {}, **{'for': id_for_label})
if self.field.required and hasattr(self.form, 'required_css_class'):
attrs = attrs or {}
if 'class' in attrs:
attrs['class'] += ' ' + self.form.required_css_class
else:
attrs['class'] = self.form.required_css_class
attrs = flatatt(attrs) if attrs else ''
contents = format_html('<label{}>{}</label>', attrs, contents)
else:
contents = conditional_escape(contents)
return mark_safe(contents)
def css_classes(self, extra_classes=None):
"""
Returns a string of space-separated CSS classes for this field.
"""
if hasattr(extra_classes, 'split'):
extra_classes = extra_classes.split()
extra_classes = set(extra_classes or [])
if self.errors and hasattr(self.form, 'error_css_class'):
extra_classes.add(self.form.error_css_class)
if self.field.required and hasattr(self.form, 'required_css_class'):
extra_classes.add(self.form.required_css_class)
return ' '.join(extra_classes)
@property
def is_hidden(self):
"Returns True if this BoundField's widget is hidden."
return self.field.widget.is_hidden
@property
def auto_id(self):
"""
Calculates and returns the ID attribute for this BoundField, if the
associated Form has specified auto_id. Returns an empty string otherwise.
"""
auto_id = self.form.auto_id
if auto_id and '%s' in smart_text(auto_id):
return smart_text(auto_id) % self.html_name
elif auto_id:
return self.html_name
return ''
@property
def id_for_label(self):
"""
Wrapper around the field widget's `id_for_label` method.
Useful, for example, for focusing on this field regardless of whether
it has a single widget or a MultiWidget.
"""
widget = self.field.widget
id_ = widget.attrs.get('id') or self.auto_id
return widget.id_for_label(id_)

7
django/forms/utils.py
View File

@ -16,6 +16,13 @@ except ImportError: # Python 2
from UserList import UserList
def pretty_name(name):
"""Converts 'first_name' to 'First name'"""
if not name:
return ''
return name.replace('_', ' ').capitalize()
def flatatt(attrs):
"""
Convert a dictionary of attributes to a single string.

3
tests/forms_tests/tests/test_fields.py
View File

@ -1515,6 +1515,7 @@ class FieldsTests(SimpleTestCase):
f.choices.sort()
expected = [
('/django/forms/__init__.py', '__init__.py'),
('/django/forms/boundfield.py', 'boundfield.py'),
('/django/forms/fields.py', 'fields.py'),
('/django/forms/forms.py', 'forms.py'),
('/django/forms/formsets.py', 'formsets.py'),
@ -1538,6 +1539,7 @@ class FieldsTests(SimpleTestCase):
f.choices.sort()
expected = [
('/django/forms/__init__.py', '__init__.py'),
('/django/forms/boundfield.py', 'boundfield.py'),
('/django/forms/fields.py', 'fields.py'),
('/django/forms/forms.py', 'forms.py'),
('/django/forms/formsets.py', 'formsets.py'),
@ -1556,6 +1558,7 @@ class FieldsTests(SimpleTestCase):
f.choices.sort()
expected = [
('/django/forms/__init__.py', '__init__.py'),
('/django/forms/boundfield.py', 'boundfield.py'),
('/django/forms/extras/__init__.py', 'extras/__init__.py'),
('/django/forms/extras/widgets.py', 'extras/widgets.py'),
('/django/forms/fields.py', 'fields.py'),