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Refs #12203 -- Improved error handling for the case where a user manually specifies an m2m field with an explicit through field. Thanks to dgouldin for the report, and Ramiro Morales for the patch. 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@11737 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Russell Keith-Magee 2009-11-13 12:35:05 +00:00
parent dd045aaab5
commit 0aeb1e135d
2 changed files with 16 additions and 2 deletions
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3
django/contrib/admin/validation.py
View File

@ -196,6 +196,9 @@ def validate_base(cls, model):
check_isseq(cls, 'fields', cls.fields)
for field in cls.fields:
check_formfield(cls, model, opts, 'fields', field)
f = get_field(cls, model, opts, 'fields', field)
if isinstance(f, models.ManyToManyField) and not f.rel.through._meta.auto_created:
raise ImproperlyConfigured("'%s.fields' can't include the ManyToManyField field '%s' because '%s' manually specifies a 'through' model." % (cls.__name__, field, field))
if cls.fieldsets:
raise ImproperlyConfigured('Both fieldsets and fields are specified in %s.' % cls.__name__)
if len(cls.fields) > len(set(cls.fields)):

13
tests/regressiontests/admin_validation/models.py
View File

@ -108,7 +108,18 @@ Exception: <class 'regressiontests.admin_validation.models.TwoAlbumFKAndAnE'> ha
>>> validate_inline(TwoAlbumFKAndAnEInline, None, Album)
# Regression test for #12203 -- If the explicitly provided through model
# Regression test for #12203 - Fail more gracefully when a M2M field that
# specifies the 'through' option is included in the 'fields' ModelAdmin option.
>>> class BookAdmin(admin.ModelAdmin):
... fields = ['authors']
>>> validate(BookAdmin, Book)
Traceback (most recent call last):
...
ImproperlyConfigured: 'BookAdmin.fields' can't include the ManyToManyField field 'authors' because 'authors' manually specifies a 'through' model.
# Regression test for #12209 -- If the explicitly provided through model
# is specified as a string, the admin should still be able use
# Model.m2m_field.through