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92824e7102
Models with deferred fields, or which are proxying for an existing model, now return the same ContentType object as the real model they reflect. Thanks to tomasz.elendt for help with fixing this. git-svn-id: http://code.djangoproject.com/svn/django/trunk@10523 bcc190cf-cafb-0310-a4f2-bffc1f526a37
106 lines
2.8 KiB
Python
106 lines
2.8 KiB
Python
"""
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Regression tests for defer() / only() behavior.
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"""
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from django.conf import settings
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from django.contrib.contenttypes.models import ContentType
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from django.db import connection, models
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class Item(models.Model):
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name = models.CharField(max_length=15)
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text = models.TextField(default="xyzzy")
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value = models.IntegerField()
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other_value = models.IntegerField(default=0)
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def __unicode__(self):
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return self.name
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class RelatedItem(models.Model):
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item = models.ForeignKey(Item)
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class Child(models.Model):
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name = models.CharField(max_length=10)
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value = models.IntegerField()
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class Leaf(models.Model):
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name = models.CharField(max_length=10)
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child = models.ForeignKey(Child)
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second_child = models.ForeignKey(Child, related_name="other", null=True)
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value = models.IntegerField(default=42)
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def __unicode__(self):
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return self.name
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__test__ = {"regression_tests": """
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Deferred fields should really be deferred and not accidentally use the field's
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default value just because they aren't passed to __init__.
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>>> settings.DEBUG = True
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>>> _ = Item.objects.create(name="first", value=42)
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>>> obj = Item.objects.only("name", "other_value").get(name="first")
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# Accessing "name" doesn't trigger a new database query. Accessing "value" or
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# "text" should.
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>>> num = len(connection.queries)
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>>> obj.name
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u"first"
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>>> obj.other_value
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0
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>>> len(connection.queries) == num
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True
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>>> obj.value
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42
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>>> len(connection.queries) == num + 1 # Effect of values lookup.
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True
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>>> obj.text
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u"xyzzy"
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>>> len(connection.queries) == num + 2 # Effect of text lookup.
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True
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>>> obj.text
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u"xyzzy"
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>>> len(connection.queries) == num + 2
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True
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>>> settings.DEBUG = False
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Regression test for #10695. Make sure different instances don't inadvertently
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share data in the deferred descriptor objects.
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>>> i = Item.objects.create(name="no I'm first", value=37)
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>>> items = Item.objects.only('value').order_by('-value')
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>>> items[0].name
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u'first'
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>>> items[1].name
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u"no I'm first"
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>>> _ = RelatedItem.objects.create(item=i)
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>>> r = RelatedItem.objects.defer('item').get()
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>>> r.item_id == i.id
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True
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>>> r.item == i
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True
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Some further checks for select_related() and inherited model behaviour
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(regression for #10710).
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>>> c1 = Child.objects.create(name="c1", value=42)
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>>> obj = Leaf.objects.create(name="l1", child=c1)
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>>> obj = Leaf.objects.only("name", "child").select_related()[0]
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>>> obj.child.name
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u'c1'
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>>> Leaf.objects.select_related().only("child__name", "second_child__name")
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[<Leaf_Deferred_name_value: l1>]
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Models instances with deferred fields should still return the same content
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types as their non-deferred versions (bug #10738).
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>>> ctype = ContentType.objects.get_for_model
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>>> c1 = ctype(Item.objects.all()[0])
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>>> c2 = ctype(Item.objects.defer("name")[0])
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>>> c3 = ctype(Item.objects.only("name")[0])
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>>> c1 is c2 is c3
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True
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"""
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}
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