153 lines
4.1 KiB
Python
153 lines
4.1 KiB
Python
"""
|
|
Models can have a ``managed`` attribute, which specifies whether the SQL code
|
|
is generated for the table on various manage.py operations.
|
|
"""
|
|
|
|
from django.db import models
|
|
|
|
# All of these models are creatd in the database by Django.
|
|
|
|
class A01(models.Model):
|
|
f_a = models.CharField(max_length=10, db_index=True)
|
|
f_b = models.IntegerField()
|
|
|
|
class Meta:
|
|
db_table = 'A01'
|
|
|
|
def __unicode__(self):
|
|
return self.f_a
|
|
|
|
class B01(models.Model):
|
|
fk_a = models.ForeignKey(A01)
|
|
f_a = models.CharField(max_length=10, db_index=True)
|
|
f_b = models.IntegerField()
|
|
|
|
class Meta:
|
|
db_table = 'B01'
|
|
# 'managed' is True by default. This tests we can set it explicitly.
|
|
managed = True
|
|
|
|
def __unicode__(self):
|
|
return self.f_a
|
|
|
|
class C01(models.Model):
|
|
mm_a = models.ManyToManyField(A01, db_table='D01')
|
|
f_a = models.CharField(max_length=10, db_index=True)
|
|
f_b = models.IntegerField()
|
|
|
|
class Meta:
|
|
db_table = 'C01'
|
|
|
|
def __unicode__(self):
|
|
return self.f_a
|
|
|
|
# All of these models use the same tables as the previous set (they are shadows
|
|
# of possibly a subset of the columns). There should be no creation errors,
|
|
# since we have told Django they aren't managed by Django.
|
|
|
|
class A02(models.Model):
|
|
f_a = models.CharField(max_length=10, db_index=True)
|
|
|
|
class Meta:
|
|
db_table = 'A01'
|
|
managed = False
|
|
|
|
def __unicode__(self):
|
|
return self.f_a
|
|
|
|
class B02(models.Model):
|
|
class Meta:
|
|
db_table = 'B01'
|
|
managed = False
|
|
|
|
fk_a = models.ForeignKey(A02)
|
|
f_a = models.CharField(max_length=10, db_index=True)
|
|
f_b = models.IntegerField()
|
|
|
|
def __unicode__(self):
|
|
return self.f_a
|
|
|
|
# To re-use the many-to-many intermediate table, we need to manually set up
|
|
# things up.
|
|
class C02(models.Model):
|
|
mm_a = models.ManyToManyField(A02, through="Intermediate")
|
|
f_a = models.CharField(max_length=10, db_index=True)
|
|
f_b = models.IntegerField()
|
|
|
|
class Meta:
|
|
db_table = 'C01'
|
|
managed = False
|
|
|
|
def __unicode__(self):
|
|
return self.f_a
|
|
|
|
class Intermediate(models.Model):
|
|
a02 = models.ForeignKey(A02, db_column="a01_id")
|
|
c02 = models.ForeignKey(C02, db_column="c01_id")
|
|
|
|
class Meta:
|
|
db_table = 'D01'
|
|
managed = False
|
|
|
|
#
|
|
# These next models test the creation (or not) of many to many join tables
|
|
# between managed and unmanaged models. A join table between two unmanaged
|
|
# models shouldn't be automatically created (see #10647).
|
|
#
|
|
|
|
# Firstly, we need some models that will create the tables, purely so that the
|
|
# tables are created. This is a test setup, not a requirement for unmanaged
|
|
# models.
|
|
class Proxy1(models.Model):
|
|
class Meta:
|
|
db_table = "unmanaged_models_proxy1"
|
|
|
|
class Proxy2(models.Model):
|
|
class Meta:
|
|
db_table = "unmanaged_models_proxy2"
|
|
|
|
class Unmanaged1(models.Model):
|
|
class Meta:
|
|
managed = False
|
|
db_table = "unmanaged_models_proxy1"
|
|
|
|
# Unmanged with an m2m to unmanaged: the intermediary table won't be created.
|
|
class Unmanaged2(models.Model):
|
|
mm = models.ManyToManyField(Unmanaged1)
|
|
|
|
class Meta:
|
|
managed = False
|
|
db_table = "unmanaged_models_proxy2"
|
|
|
|
# Here's an unmanaged model with an m2m to a managed one; the intermediary
|
|
# table *will* be created (unless given a custom `through` as for C02 above).
|
|
class Managed1(models.Model):
|
|
mm = models.ManyToManyField(Unmanaged1)
|
|
|
|
__test__ = {'API_TESTS':"""
|
|
The main test here is that the all the models can be created without any
|
|
database errors. We can also do some more simple insertion and lookup tests
|
|
whilst we're here to show that the second of models do refer to the tables from
|
|
the first set.
|
|
|
|
# Insert some data into one set of models.
|
|
>>> a = A01.objects.create(f_a="foo", f_b=42)
|
|
>>> _ = B01.objects.create(fk_a=a, f_a="fred", f_b=1729)
|
|
>>> c = C01.objects.create(f_a="barney", f_b=1)
|
|
>>> c.mm_a = [a]
|
|
|
|
# ... and pull it out via the other set.
|
|
>>> A02.objects.all()
|
|
[<A02: foo>]
|
|
>>> b = B02.objects.all()[0]
|
|
>>> b
|
|
<B02: fred>
|
|
>>> b.fk_a
|
|
<A02: foo>
|
|
>>> C02.objects.filter(f_a=None)
|
|
[]
|
|
>>> C02.objects.filter(mm_a=a.id)
|
|
[<C02: barney>]
|
|
|
|
"""}
|