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Refs #30591 -- Adjusted table rebuild for non-pk relationship on SQLite. 

The existing code was only accounting for primary key changes and not
all unique key fields that can be referenced.
This commit is contained in:
Simon Charette 2020-04-17 00:54:37 -04:00 committed by Mariusz Felisiak
parent a548280857
commit 5220ca8d8a
2 changed files with 25 additions and 11 deletions
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22
django/db/backends/sqlite3/schema.py
View File

@ -358,8 +358,8 @@ class DatabaseSchemaEditor(BaseDatabaseSchemaEditor):
return self.execute(self._rename_field_sql(model._meta.db_table, old_field, new_field, new_type))
# Alter by remaking table
self._remake_table(model, alter_field=(old_field, new_field))
# Rebuild tables with FKs pointing to this field if the PK type changed.
if old_field.primary_key and new_field.primary_key and old_type != new_type:
# Rebuild tables with FKs pointing to this field.
if new_field.unique and old_type != new_type:
related_models = set()
opts = new_field.model._meta
for remote_field in opts.related_objects:
@ -367,15 +367,17 @@ class DatabaseSchemaEditor(BaseDatabaseSchemaEditor):
if remote_field.related_model == model:
continue
if not remote_field.many_to_many:
related_models.add(remote_field.related_model)
elif remote_field.through._meta.auto_created:
if remote_field.field_name == new_field.name:
related_models.add(remote_field.related_model)
elif new_field.primary_key and remote_field.through._meta.auto_created:
related_models.add(remote_field.through)
for many_to_many in opts.many_to_many:
# Ignore self-relationship since the table was already rebuilt.
if many_to_many.related_model == model:
continue
if many_to_many.remote_field.through._meta.auto_created:
related_models.add(many_to_many.remote_field.through)
if new_field.primary_key:
for many_to_many in opts.many_to_many:
# Ignore self-relationship since the table was already rebuilt.
if many_to_many.related_model == model:
continue
if many_to_many.remote_field.through._meta.auto_created:
related_models.add(many_to_many.remote_field.through)
for related_model in related_models:
self._remake_table(related_model)

14
tests/migrations/test_operations.py
View File

@ -1341,7 +1341,7 @@ class OperationTests(OperationTestBase):
project_state = self.apply_operations(app_label, ProjectState(), operations=[
migrations.CreateModel('Rider', fields=[
('id', models.AutoField(primary_key=True)),
('code', models.PositiveIntegerField(unique=True)),
('code', models.IntegerField(unique=True)),
]),
migrations.CreateModel('Pony', fields=[
('id', models.AutoField(primary_key=True)),
@ -1354,6 +1354,18 @@ class OperationTests(OperationTestBase):
models.CharField(max_length=100, unique=True),
)
self.apply_operations(app_label, project_state, operations=[operation])
id_type, id_null = [
(c.type_code, c.null_ok)
for c in self.get_table_description('%s_rider' % app_label)
if c.name == 'code'
][0]
fk_type, fk_null = [
(c.type_code, c.null_ok)
for c in self.get_table_description('%s_pony' % app_label)
if c.name == 'rider_id'
][0]
self.assertEqual(id_type, fk_type)
self.assertEqual(id_null, fk_null)
@skipUnlessDBFeature('supports_foreign_keys')
def test_alter_field_reloads_state_on_fk_with_to_field_related_name_target_type_change(self):