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Fixed #31064 -- Recreated auto-created many-to-many tables on primary key data type change on SQLite.
Both local and remote auto-created many-to-many relationships were affected.
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@ -361,12 +361,21 @@ class DatabaseSchemaEditor(BaseDatabaseSchemaEditor):
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# Rebuild tables with FKs pointing to this field if the PK type changed.
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if old_field.primary_key and new_field.primary_key and old_type != new_type:
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related_models = set()
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for remote_field in new_field.model._meta.related_objects:
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opts = new_field.model._meta
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for remote_field in opts.related_objects:
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# Ignore self-relationship since the table was already rebuilt.
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if remote_field.related_model == model:
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continue
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if not remote_field.many_to_many:
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related_models.add(remote_field.related_model)
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elif remote_field.through._meta.auto_created:
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related_models.add(remote_field.through)
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for many_to_many in opts.many_to_many:
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# Ignore self-relationship since the table was already rebuilt.
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if many_to_many.related_model == model:
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continue
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if many_to_many.remote_field.through._meta.auto_created:
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related_models.add(many_to_many.remote_field.through)
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for related_model in related_models:
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self._remake_table(related_model)
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@ -1275,6 +1275,16 @@ class OperationTests(OperationTestBase):
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Tests the AlterField operation on primary keys changes any FKs pointing to it.
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"""
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project_state = self.set_up_test_model("test_alflpkfk", related_model=True)
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project_state = self.apply_operations('test_alflpkfk', project_state, [
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migrations.CreateModel('Stable', fields=[
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('ponies', models.ManyToManyField('Pony')),
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]),
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migrations.AddField(
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'Pony',
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'stables',
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models.ManyToManyField('Stable'),
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),
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])
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# Test the state alteration
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operation = migrations.AlterField("Pony", "id", models.FloatField(primary_key=True))
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new_state = project_state.clone()
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@ -1294,8 +1304,26 @@ class OperationTests(OperationTestBase):
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for c in connection.introspection.get_table_description(cursor, "test_alflpkfk_rider")
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if c.name == "pony_id"
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][0]
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m2m_fk_type, m2m_fk_null = [
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(c.type_code, c.null_ok)
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for c in connection.introspection.get_table_description(
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cursor,
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'test_alflpkfk_pony_stables',
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) if c.name == 'pony_id'
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][0]
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remote_m2m_fk_type, remote_m2m_fk_null = [
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(c.type_code, c.null_ok)
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for c in connection.introspection.get_table_description(
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cursor,
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'test_alflpkfk_stable_ponies',
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) if c.name == 'pony_id'
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][0]
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self.assertEqual(id_type, fk_type)
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self.assertEqual(id_type, m2m_fk_type)
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self.assertEqual(id_type, remote_m2m_fk_type)
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self.assertEqual(id_null, fk_null)
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self.assertEqual(id_null, m2m_fk_null)
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self.assertEqual(id_null, remote_m2m_fk_null)
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assertIdTypeEqualsFkType()
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# Test the database alteration
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