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12716794db
* Serializers were including all superclass fields in their output. Now only local fields are included. * Implicit OneToOne primary keys were not correctly added to the metamodel, so they were always marked to be serialized, even though they were primary * Model saving was too aggressive about creating new parent class instances during deserialization. Raw save on a model now skips saving of the parent class. git-svn-id: http://code.djangoproject.com/svn/django/trunk@7600 bcc190cf-cafb-0310-a4f2-bffc1f526a37
121 lines
4.2 KiB
Python
121 lines
4.2 KiB
Python
"""
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Regression tests for Model inheritance behaviour.
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"""
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from django.db import models
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class Place(models.Model):
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name = models.CharField(max_length=50)
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address = models.CharField(max_length=80)
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class Meta:
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ordering = ('name',)
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def __unicode__(self):
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return u"%s the place" % self.name
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class Restaurant(Place):
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serves_hot_dogs = models.BooleanField()
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serves_pizza = models.BooleanField()
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def __unicode__(self):
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return u"%s the restaurant" % self.name
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class ItalianRestaurant(Restaurant):
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serves_gnocchi = models.BooleanField()
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def __unicode__(self):
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return u"%s the italian restaurant" % self.name
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class ParkingLot(Place):
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# An explicit link to the parent (we can control the attribute name).
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parent = models.OneToOneField(Place, primary_key=True, parent_link=True)
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capacity = models.IntegerField()
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def __unicode__(self):
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return u"%s the parking lot" % self.name
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__test__ = {'API_TESTS':"""
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# Regression for #7350, #7202
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# Check that when you create a Parent object with a specific reference to an existent
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# child instance, saving the Parent doesn't duplicate the child.
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# This behaviour is only activated during a raw save - it is mostly relevant to
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# deserialization, but any sort of CORBA style 'narrow()' API would require a
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# similar approach.
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# Create a child-parent-grandparent chain
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>>> place1 = Place(name="Guido's House of Pasta", address='944 W. Fullerton')
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>>> place1.save_base(raw=True)
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>>> restaurant = Restaurant(place_ptr=place1, serves_hot_dogs=True, serves_pizza=False)
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>>> restaurant.save_base(raw=True)
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>>> italian_restaurant = ItalianRestaurant(restaurant_ptr=restaurant, serves_gnocchi=True)
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>>> italian_restaurant.save_base(raw=True)
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# Create a child-parent chain with an explicit parent link
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>>> place2 = Place(name='Main St', address='111 Main St')
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>>> place2.save_base(raw=True)
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>>> park = ParkingLot(parent=place2, capacity=100)
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>>> park.save_base(raw=True)
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# Check that no extra parent objects have been created.
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>>> Place.objects.all()
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[<Place: Guido's House of Pasta the place>, <Place: Main St the place>]
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>>> dicts = Restaurant.objects.values('name','serves_hot_dogs')
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>>> [sorted(d.items()) for d in dicts]
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[[('name', u"Guido's House of Pasta"), ('serves_hot_dogs', True)]]
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>>> dicts = ItalianRestaurant.objects.values('name','serves_hot_dogs','serves_gnocchi')
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>>> [sorted(d.items()) for d in dicts]
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[[('name', u"Guido's House of Pasta"), ('serves_gnocchi', True), ('serves_hot_dogs', True)]]
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>>> dicts = ParkingLot.objects.values('name','capacity')
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>>> [sorted(d.items()) for d in dicts]
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[[('capacity', 100), ('name', u'Main St')]]
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# You can also update objects when using a raw save.
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>>> place1.name = "Guido's All New House of Pasta"
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>>> place1.save_base(raw=True)
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>>> restaurant.serves_hot_dogs = False
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>>> restaurant.save_base(raw=True)
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>>> italian_restaurant.serves_gnocchi = False
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>>> italian_restaurant.save_base(raw=True)
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>>> place2.name='Derelict lot'
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>>> place2.save_base(raw=True)
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>>> park.capacity = 50
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>>> park.save_base(raw=True)
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# No extra parent objects after an update, either.
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>>> Place.objects.all()
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[<Place: Derelict lot the place>, <Place: Guido's All New House of Pasta the place>]
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>>> dicts = Restaurant.objects.values('name','serves_hot_dogs')
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>>> [sorted(d.items()) for d in dicts]
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[[('name', u"Guido's All New House of Pasta"), ('serves_hot_dogs', False)]]
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>>> dicts = ItalianRestaurant.objects.values('name','serves_hot_dogs','serves_gnocchi')
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>>> [sorted(d.items()) for d in dicts]
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[[('name', u"Guido's All New House of Pasta"), ('serves_gnocchi', False), ('serves_hot_dogs', False)]]
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>>> dicts = ParkingLot.objects.values('name','capacity')
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>>> [sorted(d.items()) for d in dicts]
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[[('capacity', 50), ('name', u'Derelict lot')]]
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# If you try to raw_save a parent attribute onto a child object,
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# the attribute will be ignored.
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>>> italian_restaurant.name = "Lorenzo's Pasta Hut"
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>>> italian_restaurant.save_base(raw=True)
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# Note that the name has not changed
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# - name is an attribute of Place, not ItalianRestaurant
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>>> dicts = ItalianRestaurant.objects.values('name','serves_hot_dogs','serves_gnocchi')
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>>> [sorted(d.items()) for d in dicts]
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[[('name', u"Guido's All New House of Pasta"), ('serves_gnocchi', False), ('serves_hot_dogs', False)]]
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"""}
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