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3c6318e831
There was a regression in case two models inherited the same parent,
and one contained a foreign key to other. When select_related travelled
the foreign key the other model reused the parent join made by the
first model. This was likely caused by Query.join_parent_model()
addition in commit 68985db482.
Thanks to Trac alias loic84 for report & tests.
111 lines
2.8 KiB
Python
111 lines
2.8 KiB
Python
from __future__ import unicode_literals
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from django.db import models
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from django.utils.encoding import python_2_unicode_compatible
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@python_2_unicode_compatible
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class Building(models.Model):
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name = models.CharField(max_length=10)
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def __str__(self):
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return "Building: %s" % self.name
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@python_2_unicode_compatible
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class Device(models.Model):
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building = models.ForeignKey('Building')
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name = models.CharField(max_length=10)
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def __str__(self):
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return "device '%s' in building %s" % (self.name, self.building)
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@python_2_unicode_compatible
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class Port(models.Model):
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device = models.ForeignKey('Device')
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port_number = models.CharField(max_length=10)
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def __str__(self):
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return "%s/%s" % (self.device.name, self.port_number)
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@python_2_unicode_compatible
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class Connection(models.Model):
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start = models.ForeignKey(Port, related_name='connection_start',
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unique=True)
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end = models.ForeignKey(Port, related_name='connection_end', unique=True)
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def __str__(self):
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return "%s to %s" % (self.start, self.end)
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# Another non-tree hierarchy that exercises code paths similar to the above
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# example, but in a slightly different configuration.
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class TUser(models.Model):
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name = models.CharField(max_length=200)
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class Person(models.Model):
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user = models.ForeignKey(TUser, unique=True)
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class Organizer(models.Model):
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person = models.ForeignKey(Person)
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class Student(models.Model):
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person = models.ForeignKey(Person)
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class Class(models.Model):
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org = models.ForeignKey(Organizer)
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class Enrollment(models.Model):
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std = models.ForeignKey(Student)
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cls = models.ForeignKey(Class)
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# Models for testing bug #8036.
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class Country(models.Model):
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name = models.CharField(max_length=50)
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class State(models.Model):
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name = models.CharField(max_length=50)
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country = models.ForeignKey(Country)
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class ClientStatus(models.Model):
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name = models.CharField(max_length=50)
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class Client(models.Model):
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name = models.CharField(max_length=50)
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state = models.ForeignKey(State, null=True)
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status = models.ForeignKey(ClientStatus)
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class SpecialClient(Client):
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value = models.IntegerField()
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# Some model inheritance exercises
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@python_2_unicode_compatible
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class Parent(models.Model):
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name = models.CharField(max_length=10)
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def __str__(self):
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return self.name
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class Child(Parent):
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value = models.IntegerField()
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@python_2_unicode_compatible
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class Item(models.Model):
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name = models.CharField(max_length=10)
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child = models.ForeignKey(Child, null=True)
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def __str__(self):
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return self.name
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# Models for testing bug #19870.
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@python_2_unicode_compatible
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class Fowl(models.Model):
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name = models.CharField(max_length=10)
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def __str__(self):
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return self.name
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class Hen(Fowl):
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pass
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class Chick(Fowl):
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mother = models.ForeignKey(Hen)
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