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"""
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 created 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"
class B01(models.Model):
fk_a = models.ForeignKey(A01, models.CASCADE)
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
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"
# 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
class B02(models.Model):
class Meta:
db_table = "b01"
managed = False
fk_a = models.ForeignKey(A02, models.CASCADE)
f_a = models.CharField(max_length=10, db_index=True)
f_b = models.IntegerField()
# 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
class Intermediate(models.Model):
a02 = models.ForeignKey(A02, models.CASCADE, db_column="a01_id")
c02 = models.ForeignKey(C02, models.CASCADE, 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"
# Unmanaged 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)
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