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Code Issues 25 Releases Wiki Activity

Fixed #7825 - modeltests/delete tests failing after NFA merge, and improved documentation of these tests.

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git-svn-id: http://code.djangoproject.com/svn/django/trunk@8030 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Luke Plant 2008-07-21 17:28:21 +00:00
parent fb51608332
commit 384a721e1c
1 changed files with 21 additions and 10 deletions
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31
tests/modeltests/delete/models.py
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@ -42,7 +42,9 @@ class F(DefaultRepr, models.Model):
__test__ = {'API_TESTS': """
# First, some tests for the datastructure we use
### Tests for models A,B,C,D ###
## First, test the CollectedObjects data structure directly
>>> from django.db.models.query import CollectedObjects
@ -72,6 +74,7 @@ Traceback (most recent call last):
CyclicDependency: There is a cyclic dependency of items to be processed.
## Second, test the usage of CollectedObjects by Model.delete()
# Due to the way that transactions work in the test harness,
# doing m.delete() here can work but fail in a real situation,
@ -84,14 +87,21 @@ CyclicDependency: There is a cyclic dependency of items to be processed.
# then try again with a known 'tricky' order. Slightly naughty
# access to internals here :-)
# If implementation changes, then the tests may need to be simplified:
# - remove the lines that set the .keyOrder and clear the related
# object caches
# - remove the second set of tests (with a2, b2 etc)
>>> from django.db.models.loading import cache
>>> def clear_rel_obj_caches(models):
... for m in models:
... if hasattr(m._meta, '_related_objects_cache'):
... del m._meta._related_objects_cache
# Nice order
>>> cache.app_models['delete'].keyOrder = ['a', 'b', 'c', 'd']
>>> del A._meta._related_objects_cache
>>> del B._meta._related_objects_cache
>>> del C._meta._related_objects_cache
>>> del D._meta._related_objects_cache
>>> clear_rel_obj_caches([A, B, C, D])
>>> a1 = A()
>>> a1.save()
@ -110,10 +120,7 @@ CyclicDependency: There is a cyclic dependency of items to be processed.
# Same again with a known bad order
>>> cache.app_models['delete'].keyOrder = ['d', 'c', 'b', 'a']
>>> del A._meta._related_objects_cache
>>> del B._meta._related_objects_cache
>>> del C._meta._related_objects_cache
>>> del D._meta._related_objects_cache
>>> clear_rel_obj_caches([A, B, C, D])
>>> a2 = A()
>>> a2.save()
@ -130,7 +137,9 @@ CyclicDependency: There is a cyclic dependency of items to be processed.
[<class 'modeltests.delete.models.D'>, <class 'modeltests.delete.models.C'>, <class 'modeltests.delete.models.B'>, <class 'modeltests.delete.models.A'>]
>>> a2.delete()
# Tests for nullable related fields
### Tests for models E,F - nullable related fields ###
## First, test the CollectedObjects data structure directly
>>> g = CollectedObjects()
>>> g.add("key1", 1, "item1", None)
@ -142,6 +151,8 @@ True
>>> g.ordered_keys()
['key1', 'key2']
## Second, test the usage of CollectedObjects by Model.delete()
>>> e1 = E()
>>> e1.save()
>>> f1 = F(e=e1)