Opened 7 years ago
Closed 7 years ago
#28243 closed Bug (duplicate)
Renaming Base model in multi-table inheritance raises django.core.exceptions.FieldError: Auto-generated field clashes
Reported by: | Shailesh Ahuja | Owned by: | nobody |
---|---|---|---|
Component: | Migrations | Version: | 1.11 |
Severity: | Normal | Keywords: | |
Cc: | Triage Stage: | Unreviewed | |
Has patch: | no | Needs documentation: | no |
Needs tests: | no | Patch needs improvement: | no |
Easy pickings: | no | UI/UX: | no |
Description
Simple test case to demonstrate this issue:
models.py
class A(models.Model): pass class B(A): pass
Run makemigrations, and migrate
Change models.py
class A2(models.Model): pass class B(A2): pass
Run makemigrations:
Did you rename the main.A model to A2? [y/N] y Did you rename b.a_ptr to b.a2_ptr (a OneToOneField)? [y/N] y
Run migrate:
Applying main.0002_auto_20170526_0825...Traceback (most recent call last): File "manage.py", line 22, in <module> execute_from_command_line(sys.argv) File "<path to virtual env>/lib/python2.7/site-packages/django/core/management/__init__.py", line 363, in execute_from_command_line utility.execute() File "<path to virtual env>/lib/python2.7/site-packages/django/core/management/__init__.py", line 355, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "<path to virtual env>/lib/python2.7/site-packages/django/core/management/base.py", line 283, in run_from_argv self.execute(*args, **cmd_options) File "<path to virtual env>/lib/python2.7/site-packages/django/core/management/base.py", line 330, in execute output = self.handle(*args, **options) File "<path to virtual env>/lib/python2.7/site-packages/django/core/management/commands/migrate.py", line 204, in handle fake_initial=fake_initial, File "<path to virtual env>/lib/python2.7/site-packages/django/db/migrations/executor.py", line 115, in migrate state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial) File "<path to virtual env>/lib/python2.7/site-packages/django/db/migrations/executor.py", line 145, in _migrate_all_forwards state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial) File "<path to virtual env>/lib/python2.7/site-packages/django/db/migrations/executor.py", line 244, in apply_migration state = migration.apply(state, schema_editor) File "<path to virtual env>/lib/python2.7/site-packages/django/db/migrations/migration.py", line 119, in apply operation.state_forwards(self.app_label, project_state) File "<path to virtual env>/lib/python2.7/site-packages/django/db/migrations/operations/models.py", line 337, in state_forwards state.reload_models(to_reload, delay=True) File "<path to virtual env>/lib/python2.7/site-packages/django/db/migrations/state.py", line 173, in reload_models self._reload(related_models) File "<path to virtual env>/lib/python2.7/site-packages/django/db/migrations/state.py", line 199, in _reload self.apps.render_multiple(states_to_be_rendered) File "<path to virtual env>/lib/python2.7/site-packages/django/db/migrations/state.py", line 323, in render_multiple model.render(self) File "<path to virtual env>/lib/python2.7/site-packages/django/db/migrations/state.py", line 626, in render body, File "<path to virtual env>/lib/python2.7/site-packages/django/db/models/base.py", line 259, in __new__ base.__name__, django.core.exceptions.FieldError: Auto-generated field 'a_ptr' in class 'B' for parent_link to base class 'A' clashes with declared field of the same name.
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Duplicate of #26488 (the error changed after ecd625e830ef765d5e60d5db7bc6e3b7ffc76d06).