Cleaned up and refactored `ModelAdmin.formfield_for_dbfield`:
* The new method uses an admin configuration option (`formfield_overrides`); this makes custom admin widgets especially easy. * Refactored what was left of `formfield_for_dbfield` into a handful of smaller methods so that it's easier to hook in and return custom fields where needed. * These `formfield_for_*` methods now pass around `request` so that you can easily modify fields based on request (as in #3987). Fixes #8306, #3987, #9148. Thanks to James Bennet for the original patch; Alex Gaynor and Brian Rosner also contributed. git-svn-id: http://code.djangoproject.com/svn/django/trunk@9760 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Jacob Kaplan-Moss
parent
d579e716fe
commit
f212b24b64
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@ -13,6 +13,7 @@ from django.shortcuts import get_object_or_404, render_to_response
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from django.utils.functional import update_wrapper
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from django.utils.html import escape
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from django.utils.safestring import mark_safe
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from django.utils.functional import curry
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from django.utils.text import capfirst, get_text_list
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from django.utils.translation import ugettext as _
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from django.utils.encoding import force_unicode
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@ -28,8 +29,28 @@ get_ul_class = lambda x: 'radiolist%s' % ((x == HORIZONTAL) and ' inline' or '')
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class IncorrectLookupParameters(Exception):
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pass
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# Defaults for formfield_overrides. ModelAdmin subclasses can change this
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# by adding to ModelAdmin.formfield_overrides.
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FORMFIELD_FOR_DBFIELD_DEFAULTS = {
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models.DateTimeField: {
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'form_class': forms.SplitDateTimeField,
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'widget': widgets.AdminSplitDateTime
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},
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models.DateField: {'widget': widgets.AdminDateWidget},
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models.TimeField: {'widget': widgets.AdminTimeWidget},
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models.TextField: {'widget': widgets.AdminTextareaWidget},
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models.URLField: {'widget': widgets.AdminURLFieldWidget},
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models.IntegerField: {'widget': widgets.AdminIntegerFieldWidget},
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models.CharField: {'widget': widgets.AdminTextInputWidget},
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models.ImageField: {'widget': widgets.AdminFileWidget},
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models.FileField: {'widget': widgets.AdminFileWidget},
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}
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class BaseModelAdmin(object):
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"""Functionality common to both ModelAdmin and InlineAdmin."""
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raw_id_fields = ()
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fields = None
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exclude = None
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@ -39,6 +60,10 @@ class BaseModelAdmin(object):
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filter_horizontal = ()
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radio_fields = {}
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prepopulated_fields = {}
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formfield_overrides = {}
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def __init__(self):
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self.formfield_overrides = dict(FORMFIELD_FOR_DBFIELD_DEFAULTS, **self.formfield_overrides)
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def formfield_for_dbfield(self, db_field, **kwargs):
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"""
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@ -47,101 +72,92 @@ class BaseModelAdmin(object):
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If kwargs are given, they're passed to the form Field's constructor.
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"""
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request = kwargs.pop("request", None)
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# If the field specifies choices, we don't need to look for special
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# admin widgets - we just need to use a select widget of some kind.
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if db_field.choices:
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if db_field.name in self.radio_fields:
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# If the field is named as a radio_field, use a RadioSelect
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return self.formfield_for_choice_field(db_field, request, **kwargs)
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# ForeignKey or ManyToManyFields
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if isinstance(db_field, (models.ForeignKey, models.ManyToManyField)):
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# Combine the field kwargs with any options for formfield_overrides.
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# Make sure the passed in **kwargs override anything in
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# formfield_overrides because **kwargs is more specific, and should
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# always win.
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if db_field.__class__ in self.formfield_overrides:
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kwargs = dict(self.formfield_overrides[db_field.__class__], **kwargs)
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# Get the correct formfield.
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if isinstance(db_field, models.ForeignKey):
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formfield = self.formfield_for_foreignkey(db_field, request, **kwargs)
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elif isinstance(db_field, models.ManyToManyField):
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formfield = self.formfield_for_manytomany(db_field, request, **kwargs)
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# For non-raw_id fields, wrap the widget with a wrapper that adds
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# extra HTML -- the "add other" interface -- to the end of the
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# rendered output. formfield can be None if it came from a
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# OneToOneField with parent_link=True or a M2M intermediary.
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if formfield and db_field.name not in self.raw_id_fields:
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formfield.widget = widgets.RelatedFieldWidgetWrapper(formfield.widget, db_field.rel, self.admin_site)
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return formfield
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# If we've got overrides for the formfield defined, use 'em. **kwargs
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# passed to formfield_for_dbfield override the defaults.
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if db_field.__class__ in self.formfield_overrides:
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kwargs = dict(self.formfield_overrides[db_field.__class__], **kwargs)
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return db_field.formfield(**kwargs)
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# For any other type of field, just call its formfield() method.
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return db_field.formfield(**kwargs)
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def formfield_for_choice_field(self, db_field, request=None, **kwargs):
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"""
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Get a form Field for a database Field that has declared choices.
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"""
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# If the field is named as a radio_field, use a RadioSelect
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if db_field.name in self.radio_fields:
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# Avoid stomping on custom widget/choices arguments.
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if 'widget' not in kwargs:
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kwargs['widget'] = widgets.AdminRadioSelect(attrs={
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'class': get_ul_class(self.radio_fields[db_field.name]),
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})
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if 'choices' not in kwargs:
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kwargs['choices'] = db_field.get_choices(
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include_blank = db_field.blank,
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blank_choice=[('', _('None'))]
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)
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return db_field.formfield(**kwargs)
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else:
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# Otherwise, use the default select widget.
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return db_field.formfield(**kwargs)
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return db_field.formfield(**kwargs)
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# For DateTimeFields, use a special field and widget.
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if isinstance(db_field, models.DateTimeField):
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kwargs['form_class'] = forms.SplitDateTimeField
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kwargs['widget'] = widgets.AdminSplitDateTime()
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return db_field.formfield(**kwargs)
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def formfield_for_foreignkey(self, db_field, request=None, **kwargs):
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"""
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Get a form Field for a ForeignKey.
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"""
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if db_field.name in self.raw_id_fields:
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kwargs['widget'] = widgets.ForeignKeyRawIdWidget(db_field.rel)
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elif db_field.name in self.radio_fields:
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kwargs['widget'] = widgets.AdminRadioSelect(attrs={
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'class': get_ul_class(self.radio_fields[db_field.name]),
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})
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kwargs['empty_label'] = db_field.blank and _('None') or None
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# For DateFields, add a custom CSS class.
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if isinstance(db_field, models.DateField):
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kwargs['widget'] = widgets.AdminDateWidget
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return db_field.formfield(**kwargs)
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return db_field.formfield(**kwargs)
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# For TimeFields, add a custom CSS class.
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if isinstance(db_field, models.TimeField):
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kwargs['widget'] = widgets.AdminTimeWidget
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return db_field.formfield(**kwargs)
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def formfield_for_manytomany(self, db_field, request=None, **kwargs):
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"""
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Get a form Field for a ManyToManyField.
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"""
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# If it uses an intermediary model, don't show field in admin.
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if db_field.rel.through is not None:
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return None
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# For TextFields, add a custom CSS class.
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if isinstance(db_field, models.TextField):
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kwargs['widget'] = widgets.AdminTextareaWidget
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return db_field.formfield(**kwargs)
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if db_field.name in self.raw_id_fields:
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kwargs['widget'] = widgets.ManyToManyRawIdWidget(db_field.rel)
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kwargs['help_text'] = ''
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elif db_field.name in (list(self.filter_vertical) + list(self.filter_horizontal)):
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kwargs['widget'] = widgets.FilteredSelectMultiple(db_field.verbose_name, (db_field.name in self.filter_vertical))
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# For URLFields, add a custom CSS class.
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if isinstance(db_field, models.URLField):
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kwargs['widget'] = widgets.AdminURLFieldWidget
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return db_field.formfield(**kwargs)
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# For IntegerFields, add a custom CSS class.
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if isinstance(db_field, models.IntegerField):
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kwargs['widget'] = widgets.AdminIntegerFieldWidget
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return db_field.formfield(**kwargs)
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# For CommaSeparatedIntegerFields, add a custom CSS class.
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if isinstance(db_field, models.CommaSeparatedIntegerField):
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kwargs['widget'] = widgets.AdminCommaSeparatedIntegerFieldWidget
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return db_field.formfield(**kwargs)
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# For TextInputs, add a custom CSS class.
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if isinstance(db_field, models.CharField):
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kwargs['widget'] = widgets.AdminTextInputWidget
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return db_field.formfield(**kwargs)
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# For FileFields and ImageFields add a link to the current file.
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if isinstance(db_field, models.ImageField) or isinstance(db_field, models.FileField):
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kwargs['widget'] = widgets.AdminFileWidget
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return db_field.formfield(**kwargs)
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# For ForeignKey or ManyToManyFields, use a special widget.
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if isinstance(db_field, (models.ForeignKey, models.ManyToManyField)):
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if isinstance(db_field, models.ForeignKey) and db_field.name in self.raw_id_fields:
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kwargs['widget'] = widgets.ForeignKeyRawIdWidget(db_field.rel)
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elif isinstance(db_field, models.ForeignKey) and db_field.name in self.radio_fields:
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kwargs['widget'] = widgets.AdminRadioSelect(attrs={
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'class': get_ul_class(self.radio_fields[db_field.name]),
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})
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kwargs['empty_label'] = db_field.blank and _('None') or None
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else:
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if isinstance(db_field, models.ManyToManyField):
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# If it uses an intermediary model, don't show field in admin.
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if db_field.rel.through is not None:
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return None
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elif db_field.name in self.raw_id_fields:
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kwargs['widget'] = widgets.ManyToManyRawIdWidget(db_field.rel)
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kwargs['help_text'] = ''
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elif db_field.name in (list(self.filter_vertical) + list(self.filter_horizontal)):
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kwargs['widget'] = widgets.FilteredSelectMultiple(db_field.verbose_name, (db_field.name in self.filter_vertical))
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# Wrap the widget's render() method with a method that adds
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# extra HTML to the end of the rendered output.
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formfield = db_field.formfield(**kwargs)
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# Don't wrap raw_id fields. Their add function is in the popup window.
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if not db_field.name in self.raw_id_fields:
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# formfield can be None if it came from a OneToOneField with
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# parent_link=True
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if formfield is not None:
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formfield.widget = widgets.RelatedFieldWidgetWrapper(formfield.widget, db_field.rel, self.admin_site)
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return formfield
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# For any other type of field, just call its formfield() method.
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return db_field.formfield(**kwargs)
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def _declared_fieldsets(self):
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@ -292,7 +308,7 @@ class ModelAdmin(BaseModelAdmin):
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"form": self.form,
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"fields": fields,
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"exclude": exclude + kwargs.get("exclude", []),
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"formfield_callback": self.formfield_for_dbfield,
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"formfield_callback": curry(self.formfield_for_dbfield, request=request),
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}
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defaults.update(kwargs)
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return modelform_factory(self.model, **defaults)
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@ -837,7 +853,7 @@ class InlineModelAdmin(BaseModelAdmin):
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"fk_name": self.fk_name,
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"fields": fields,
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"exclude": exclude + kwargs.get("exclude", []),
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"formfield_callback": self.formfield_for_dbfield,
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"formfield_callback": curry(self.formfield_for_dbfield, request=request),
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"extra": self.extra,
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"max_num": self.max_num,
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}
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@ -597,6 +597,47 @@ with an operator:
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Performs a full-text match. This is like the default search method but uses
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an index. Currently this is only available for MySQL.
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``formfield_overrides``
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~~~~~~~~~~~~~~~~~~~~~~~
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This provides a quick-and-dirty way to override some of the
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:class:`~django.forms.Field` options for use in the admin.
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``formfield_overrides`` is a dictionary mapping a field class to a dict of
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arguments to pass to the field at construction time.
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Since that's a bit abstract, let's look at a concrete example. The most common
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use of ``formfield_overrides`` is to add a custom widget for a certain type of
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field. So, imagine we've written a ``RichTextEditorWidget`` that we'd like to
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use for large text fields instead of the default ``<textarea>``. Here's how we'd
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do that::
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from django.db import models
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from django.contrib import admin
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# Import our custom widget and our model from where they're defined
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from myapp.widgets import RichTextEditorWidget
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from myapp.models import MyModel
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class MyModelAdmin(admin.ModelAdmin):
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formfield_overrides = {
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models.TextField: {'widget': RichTextEditorWidget},
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}
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Note that the key in the dictionary is the actual field class, *not* a string.
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The value is another dictionary; these arguments will be passed to
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:meth:`~django.forms.Field.__init__`. See :ref:`ref-forms-api` for details.
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.. warning::
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If you want to use a custom widget with a relation field (i.e.
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:class:`~django.db.models.ForeignKey` or
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:class:`~django.db.models.ManyToManyField`), make sure you haven't included
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that field's name in ``raw_id_fields`` or ``radio_fields``.
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``formfield_overrides`` won't let you change the widget on relation fields
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that have ``raw_id_fields`` or ``radio_fields`` set. That's because
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``raw_id_fields`` and ``radio_fields`` imply custom widgets of their own.
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``ModelAdmin`` methods
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----------------------
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@ -675,6 +716,23 @@ Notice the wrapped view in the fifth line above::
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This wrapping will protect ``self.my_view`` from unauthorized access.
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``formfield_for_foreignkey(self, db_field, request, **kwargs)``
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The ``formfield_for_foreignkey`` method on a ``ModelAdmin`` allows you to
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override the default formfield for a foreign key field. For example, to
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return a subset of objects for this foreign key field based on the user::
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class MyModelAdmin(admin.ModelAdmin):
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def formfield_for_foreignkey(self, db_field, request, **kwargs):
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if db_field.name == "car":
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kwargs["queryset"] = Car.object.filter(owner=request.user)
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return db_field.formfield(**kwargs)
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return super(MyModelAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)
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This uses the ``HttpRequest`` instance to filter the ``Car`` foreign key field
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to only the cars owned by the ``User`` instance.
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``ModelAdmin`` media definitions
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--------------------------------
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@ -0,0 +1,43 @@
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<?xml version="1.0" encoding="utf-8"?>
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<django-objects version="1.0">
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<object pk="100" model="auth.user">
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<field type="CharField" name="username">super</field>
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<field type="CharField" name="first_name">Super</field>
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<field type="CharField" name="last_name">User</field>
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<field type="CharField" name="email">super@example.com</field>
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<field type="CharField" name="password">sha1$995a3$6011485ea3834267d719b4c801409b8b1ddd0158</field>
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<field type="BooleanField" name="is_staff">True</field>
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<field type="BooleanField" name="is_active">True</field>
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<field type="BooleanField" name="is_superuser">True</field>
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<field type="DateTimeField" name="last_login">2007-05-30 13:20:10</field>
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<field type="DateTimeField" name="date_joined">2007-05-30 13:20:10</field>
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<field to="auth.group" name="groups" rel="ManyToManyRel"></field>
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<field to="auth.permission" name="user_permissions" rel="ManyToManyRel"></field>
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</object>
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<object pk="101" model="auth.user">
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<field type="CharField" name="username">testser</field>
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<field type="CharField" name="first_name">Add</field>
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<field type="CharField" name="last_name">User</field>
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<field type="CharField" name="email">auser@example.com</field>
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<field type="CharField" name="password">sha1$995a3$6011485ea3834267d719b4c801409b8b1ddd0158</field>
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<field type="BooleanField" name="is_staff">True</field>
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<field type="BooleanField" name="is_active">True</field>
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<field type="BooleanField" name="is_superuser">False</field>
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<field type="DateTimeField" name="last_login">2007-05-30 13:20:10</field>
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<field type="DateTimeField" name="date_joined">2007-05-30 13:20:10</field>
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<field to="auth.group" name="groups" rel="ManyToManyRel"></field>
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<field to="auth.permission" name="user_permissions" rel="ManyToManyRel"></field>
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</object>
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<object pk="1" model="admin_widgets.car">
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<field to="auth.user" name="owner" rel="ManyToOneRel">100</field>
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<field type="CharField" name="make">Volkswagon</field>
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<field type="CharField" name="model">Passat</field>
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</object>
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<object pk="2" model="admin_widgets.car">
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<field to="auth.user" name="owner" rel="ManyToOneRel">101</field>
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<field type="CharField" name="make">BMW</field>
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<field type="CharField" name="model">M3</field>
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</object>
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</django-objects>
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@ -2,9 +2,12 @@
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from django.conf import settings
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from django.db import models
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from django.core.files.storage import default_storage
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from django.contrib.auth.models import User
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class Member(models.Model):
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name = models.CharField(max_length=100)
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birthdate = models.DateTimeField(blank=True, null=True)
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gender = models.CharField(max_length=1, blank=True, choices=[('M','Male'), ('F', 'Female')])
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def __unicode__(self):
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return self.name
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@ -41,6 +44,28 @@ class Inventory(models.Model):
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def __unicode__(self):
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return self.name
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class Event(models.Model):
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band = models.ForeignKey(Band)
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date = models.DateField(blank=True, null=True)
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start_time = models.TimeField(blank=True, null=True)
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description = models.TextField(blank=True)
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link = models.URLField(blank=True)
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min_age = models.IntegerField(blank=True, null=True)
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class Car(models.Model):
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owner = models.ForeignKey(User)
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make = models.CharField(max_length=30)
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model = models.CharField(max_length=30)
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def __unicode__(self):
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return u"%s %s" % (self.make, self.model)
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class CarTire(models.Model):
|
||||
"""
|
||||
A single car tire. This to test that a user can only select their own cars.
|
||||
"""
|
||||
car = models.ForeignKey(Car)
|
||||
|
||||
__test__ = {'WIDGETS_TESTS': """
|
||||
>>> from datetime import datetime
|
||||
>>> from django.utils.html import escape, conditional_escape
|
||||
|
|
|
|||
|
|
@ -0,0 +1,112 @@
|
|||
from django import forms
|
||||
from django.contrib import admin
|
||||
from django.contrib.admin import widgets
|
||||
from unittest import TestCase
|
||||
from django.test import TestCase as DjangoTestCase
|
||||
import models
|
||||
|
||||
class AdminFormfieldForDBFieldTests(TestCase):
|
||||
"""
|
||||
Tests for correct behavior of ModelAdmin.formfield_for_dbfield
|
||||
"""
|
||||
|
||||
def assertFormfield(self, model, fieldname, widgetclass, **admin_overrides):
|
||||
"""
|
||||
Helper to call formfield_for_dbfield for a given model and field name
|
||||
and verify that the returned formfield is appropriate.
|
||||
"""
|
||||
# Override any settings on the model admin
|
||||
class MyModelAdmin(admin.ModelAdmin): pass
|
||||
for k in admin_overrides:
|
||||
setattr(MyModelAdmin, k, admin_overrides[k])
|
||||
|
||||
# Construct the admin, and ask it for a formfield
|
||||
ma = MyModelAdmin(model, admin.site)
|
||||
ff = ma.formfield_for_dbfield(model._meta.get_field(fieldname), request=None)
|
||||
|
||||
# "unwrap" the widget wrapper, if needed
|
||||
if isinstance(ff.widget, widgets.RelatedFieldWidgetWrapper):
|
||||
widget = ff.widget.widget
|
||||
else:
|
||||
widget = ff.widget
|
||||
|
||||
# Check that we got a field of the right type
|
||||
self.assert_(
|
||||
isinstance(widget, widgetclass),
|
||||
"Wrong widget for %s.%s: expected %s, got %s" % \
|
||||
(model.__class__.__name__, fieldname, widgetclass, type(widget))
|
||||
)
|
||||
|
||||
# Return the formfield so that other tests can continue
|
||||
return ff
|
||||
|
||||
def testDateField(self):
|
||||
self.assertFormfield(models.Event, 'date', widgets.AdminDateWidget)
|
||||
|
||||
def testDateTimeField(self):
|
||||
self.assertFormfield(models.Member, 'birthdate', widgets.AdminSplitDateTime)
|
||||
|
||||
def testTimeField(self):
|
||||
self.assertFormfield(models.Event, 'start_time', widgets.AdminTimeWidget)
|
||||
|
||||
def testTextField(self):
|
||||
self.assertFormfield(models.Event, 'description', widgets.AdminTextareaWidget)
|
||||
|
||||
def testURLField(self):
|
||||
self.assertFormfield(models.Event, 'link', widgets.AdminURLFieldWidget)
|
||||
|
||||
def testIntegerField(self):
|
||||
self.assertFormfield(models.Event, 'min_age', widgets.AdminIntegerFieldWidget)
|
||||
|
||||
def testCharField(self):
|
||||
self.assertFormfield(models.Member, 'name', widgets.AdminTextInputWidget)
|
||||
|
||||
def testFileField(self):
|
||||
self.assertFormfield(models.Album, 'cover_art', widgets.AdminFileWidget)
|
||||
|
||||
def testForeignKey(self):
|
||||
self.assertFormfield(models.Event, 'band', forms.Select)
|
||||
|
||||
def testRawIDForeignKey(self):
|
||||
self.assertFormfield(models.Event, 'band', widgets.ForeignKeyRawIdWidget,
|
||||
raw_id_fields=['band'])
|
||||
|
||||
def testRadioFieldsForeignKey(self):
|
||||
ff = self.assertFormfield(models.Event, 'band', widgets.AdminRadioSelect,
|
||||
radio_fields={'band':admin.VERTICAL})
|
||||
self.assertEqual(ff.empty_label, None)
|
||||
|
||||
def testManyToMany(self):
|
||||
self.assertFormfield(models.Band, 'members', forms.SelectMultiple)
|
||||
|
||||
def testRawIDManyTOMany(self):
|
||||
self.assertFormfield(models.Band, 'members', widgets.ManyToManyRawIdWidget,
|
||||
raw_id_fields=['members'])
|
||||
|
||||
def testFilteredManyToMany(self):
|
||||
self.assertFormfield(models.Band, 'members', widgets.FilteredSelectMultiple,
|
||||
filter_vertical=['members'])
|
||||
|
||||
def testFormfieldOverrides(self):
|
||||
self.assertFormfield(models.Event, 'date', forms.TextInput,
|
||||
formfield_overrides={'widget': forms.TextInput})
|
||||
|
||||
def testFieldWithChoices(self):
|
||||
self.assertFormfield(models.Member, 'gender', forms.Select)
|
||||
|
||||
def testChoicesWithRadioFields(self):
|
||||
self.assertFormfield(models.Member, 'gender', widgets.AdminRadioSelect,
|
||||
radio_fields={'gender':admin.VERTICAL})
|
||||
|
||||
|
||||
class AdminFormfieldForDBFieldWithRequestTests(DjangoTestCase):
|
||||
fixtures = ["admin-widgets-users.xml"]
|
||||
|
||||
def testFilterChoicesByRequestUser(self):
|
||||
"""
|
||||
Ensure the user can only see their own cars in the foreign key dropdown.
|
||||
"""
|
||||
self.client.login(username="super", password="secret")
|
||||
response = self.client.get("/widget_admin/admin_widgets/cartire/add/")
|
||||
self.assert_("BMW M3" not in response.content)
|
||||
self.assert_("Volkswagon Passat" in response.content)
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
|
||||
from django.conf.urls.defaults import *
|
||||
import widgetadmin
|
||||
|
||||
urlpatterns = patterns('',
|
||||
(r'^', include(widgetadmin.site.urls)),
|
||||
)
|
||||
|
|
@ -0,0 +1,22 @@
|
|||
"""
|
||||
|
||||
"""
|
||||
from django.contrib import admin
|
||||
|
||||
import models
|
||||
|
||||
class WidgetAdmin(admin.AdminSite):
|
||||
pass
|
||||
|
||||
|
||||
class CarTireAdmin(admin.ModelAdmin):
|
||||
def formfield_for_foreignkey(self, db_field, request, **kwargs):
|
||||
if db_field.name == "car":
|
||||
kwargs["queryset"] = models.Car.objects.filter(owner=request.user)
|
||||
return db_field.formfield(**kwargs)
|
||||
return super(CarTireAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)
|
||||
|
||||
site = WidgetAdmin()
|
||||
|
||||
site.register(models.Car)
|
||||
site.register(models.CarTire, CarTireAdmin)
|
||||
|
|
@ -25,6 +25,9 @@ urlpatterns = patterns('',
|
|||
(r'^test_admin/', include('regressiontests.admin_views.urls')),
|
||||
(r'^generic_inline_admin/', include('regressiontests.generic_inline_admin.urls')),
|
||||
|
||||
# admin widget tests
|
||||
(r'widget_admin/', include('regressiontests.admin_widgets.urls')),
|
||||
|
||||
(r'^utils/', include('regressiontests.utils.urls')),
|
||||
|
||||
# test urlconf for syndication tests
|
||||
|
|
|
|||
Loading…
Reference in New Issue