1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
"""
Regression tests for Model inheritance behaviour.
"""
import datetime
from django.db import models
# Python 2.3 doesn't have sorted()
try:
sorted
except NameError:
from django.utils.itercompat import sorted
class Place(models.Model):
name = models.CharField(max_length=50)
address = models.CharField(max_length=80)
class Meta:
ordering = ('name',)
def __unicode__(self):
return u"%s the place" % self.name
class Restaurant(Place):
serves_hot_dogs = models.BooleanField()
serves_pizza = models.BooleanField()
def __unicode__(self):
return u"%s the restaurant" % self.name
class ItalianRestaurant(Restaurant):
serves_gnocchi = models.BooleanField()
def __unicode__(self):
return u"%s the italian restaurant" % self.name
class ParkingLot(Place):
# An explicit link to the parent (we can control the attribute name).
parent = models.OneToOneField(Place, primary_key=True, parent_link=True)
capacity = models.IntegerField()
def __unicode__(self):
return u"%s the parking lot" % self.name
class Supplier(models.Model):
restaurant = models.ForeignKey(Restaurant)
class Parent(models.Model):
created = models.DateTimeField(default=datetime.datetime.now)
class Child(Parent):
name = models.CharField(max_length=10)
class SelfRefParent(models.Model):
parent_data = models.IntegerField()
self_data = models.ForeignKey('self', null=True)
class SelfRefChild(SelfRefParent):
child_data = models.IntegerField()
__test__ = {'API_TESTS':"""
# Regression for #7350, #7202
# Check that when you create a Parent object with a specific reference to an
# existent child instance, saving the Parent doesn't duplicate the child. This
# behaviour is only activated during a raw save - it is mostly relevant to
# deserialization, but any sort of CORBA style 'narrow()' API would require a
# similar approach.
# Create a child-parent-grandparent chain
>>> place1 = Place(name="Guido's House of Pasta", address='944 W. Fullerton')
>>> place1.save_base(raw=True)
>>> restaurant = Restaurant(place_ptr=place1, serves_hot_dogs=True, serves_pizza=False)
>>> restaurant.save_base(raw=True)
>>> italian_restaurant = ItalianRestaurant(restaurant_ptr=restaurant, serves_gnocchi=True)
>>> italian_restaurant.save_base(raw=True)
# Create a child-parent chain with an explicit parent link
>>> place2 = Place(name='Main St', address='111 Main St')
>>> place2.save_base(raw=True)
>>> park = ParkingLot(parent=place2, capacity=100)
>>> park.save_base(raw=True)
# Check that no extra parent objects have been created.
>>> Place.objects.all()
[<Place: Guido's House of Pasta the place>, <Place: Main St the place>]
>>> dicts = Restaurant.objects.values('name','serves_hot_dogs')
>>> [sorted(d.items()) for d in dicts]
[[('name', u"Guido's House of Pasta"), ('serves_hot_dogs', True)]]
>>> dicts = ItalianRestaurant.objects.values('name','serves_hot_dogs','serves_gnocchi')
>>> [sorted(d.items()) for d in dicts]
[[('name', u"Guido's House of Pasta"), ('serves_gnocchi', True), ('serves_hot_dogs', True)]]
>>> dicts = ParkingLot.objects.values('name','capacity')
>>> [sorted(d.items()) for d in dicts]
[[('capacity', 100), ('name', u'Main St')]]
# You can also update objects when using a raw save.
>>> place1.name = "Guido's All New House of Pasta"
>>> place1.save_base(raw=True)
>>> restaurant.serves_hot_dogs = False
>>> restaurant.save_base(raw=True)
>>> italian_restaurant.serves_gnocchi = False
>>> italian_restaurant.save_base(raw=True)
>>> place2.name='Derelict lot'
>>> place2.save_base(raw=True)
>>> park.capacity = 50
>>> park.save_base(raw=True)
# No extra parent objects after an update, either.
>>> Place.objects.all()
[<Place: Derelict lot the place>, <Place: Guido's All New House of Pasta the place>]
>>> dicts = Restaurant.objects.values('name','serves_hot_dogs')
>>> [sorted(d.items()) for d in dicts]
[[('name', u"Guido's All New House of Pasta"), ('serves_hot_dogs', False)]]
>>> dicts = ItalianRestaurant.objects.values('name','serves_hot_dogs','serves_gnocchi')
>>> [sorted(d.items()) for d in dicts]
[[('name', u"Guido's All New House of Pasta"), ('serves_gnocchi', False), ('serves_hot_dogs', False)]]
>>> dicts = ParkingLot.objects.values('name','capacity')
>>> [sorted(d.items()) for d in dicts]
[[('capacity', 50), ('name', u'Derelict lot')]]
# If you try to raw_save a parent attribute onto a child object,
# the attribute will be ignored.
>>> italian_restaurant.name = "Lorenzo's Pasta Hut"
>>> italian_restaurant.save_base(raw=True)
# Note that the name has not changed
# - name is an attribute of Place, not ItalianRestaurant
>>> dicts = ItalianRestaurant.objects.values('name','serves_hot_dogs','serves_gnocchi')
>>> [sorted(d.items()) for d in dicts]
[[('name', u"Guido's All New House of Pasta"), ('serves_gnocchi', False), ('serves_hot_dogs', False)]]
# Regressions tests for #7105: dates() queries should be able to use fields
# from the parent model as easily as the child.
>>> obj = Child.objects.create(name='child', created=datetime.datetime(2008, 6, 26, 17, 0, 0))
>>> Child.objects.dates('created', 'month')
[datetime.datetime(2008, 6, 1, 0, 0)]
# Regression test for #7276: calling delete() on a model with multi-table
# inheritance should delete the associated rows from any ancestor tables, as
# well as any descendent objects.
>>> ident = ItalianRestaurant.objects.all()[0].id
>>> Place.objects.get(pk=ident)
<Place: Guido's All New House of Pasta the place>
>>> xx = Restaurant.objects.create(name='a', address='xx', serves_hot_dogs=True, serves_pizza=False)
# This should delete both Restuarants, plus the related places, plus the ItalianRestaurant.
>>> Restaurant.objects.all().delete()
>>> Place.objects.get(pk=ident)
Traceback (most recent call last):
...
DoesNotExist: Place matching query does not exist.
>>> ItalianRestaurant.objects.get(pk=ident)
Traceback (most recent call last):
...
DoesNotExist: ItalianRestaurant matching query does not exist.
# Regression test for #6755
>>> r = Restaurant(serves_pizza=False)
>>> r.save()
>>> r.id == r.place_ptr_id
True
>>> orig_id = r.id
>>> r = Restaurant(place_ptr_id=orig_id, serves_pizza=True)
>>> r.save()
>>> r.id == orig_id
True
>>> r.id == r.place_ptr_id
True
# Regression test for #7488. This looks a little crazy, but it's the equivalent
# of what the admin interface has to do for the edit-inline case.
>>> Supplier.objects.filter(restaurant=Restaurant(name='xx', address='yy'))
[]
# Regression test for #7853
# If the parent class has a self-referential link, make sure that any updates
# to that link via the child update the right table.
>>> obj = SelfRefChild.objects.create(child_data=37, parent_data=42)
>>> obj.delete()
"""}
|
