#24563: Migration for M2M Field fails with FieldDoesNotExist when removing null=True from model -------------------------------------+------------------------------------- Reporter: GitRon | Owner: nobody Type: Bug | Status: new Component: Migrations | Version: 1.8 Severity: Normal | Resolution: Keywords: migrations, | Triage Stage: many2many, nullable | Unreviewed Has patch: 0 | Needs documentation: 0 Needs tests: 0 | Patch needs improvement: 0 Easy pickings: 0 | UI/UX: 0 -------------------------------------+------------------------------------- Changes (by codefisher):
* status: closed => new * resolution: needsinfo => Comment: I had exactly the same problem. The following is a stack trace for the error. {{{ File "manage.py", line 10, in <module> execute_from_command_line(sys.argv) File "/usr/local/lib/python2.7/dist- packages/django/core/management/__init__.py", line 338, in execute_from_command_line utility.execute() File "/usr/local/lib/python2.7/dist- packages/django/core/management/__init__.py", line 330, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/usr/local/lib/python2.7/dist- packages/django/core/management/base.py", line 390, in run_from_argv self.execute(*args, **cmd_options) File "/usr/local/lib/python2.7/dist- packages/django/core/management/base.py", line 441, in execute output = self.handle(*args, **options) File "/usr/local/lib/python2.7/dist- packages/django/core/management/commands/migrate.py", line 221, in handle executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial) File "/usr/local/lib/python2.7/dist- packages/django/db/migrations/executor.py", line 110, in migrate self.apply_migration(states[migration], migration, fake=fake, fake_initial=fake_initial) File "/usr/local/lib/python2.7/dist- packages/django/db/migrations/executor.py", line 147, in apply_migration state = migration.apply(state, schema_editor) File "/usr/local/lib/python2.7/dist- packages/django/db/migrations/migration.py", line 115, in apply operation.database_forwards(self.app_label, schema_editor, old_state, project_state) File "/usr/local/lib/python2.7/dist- packages/django/db/migrations/operations/fields.py", line 201, in database_forwards schema_editor.alter_field(from_model, from_field, to_field) File "/usr/local/lib/python2.7/dist- packages/django/db/backends/base/schema.py", line 469, in alter_field return self._alter_many_to_many(model, old_field, new_field, strict) File "/usr/local/lib/python2.7/dist- packages/django/db/backends/sqlite3/schema.py", line 232, in _alter_many_to_many override_uniques=(new_field.m2m_field_name(), new_field.m2m_reverse_field_name()), File "/usr/local/lib/python2.7/dist- packages/django/db/backends/sqlite3/schema.py", line 137, in _remake_table self.create_model(temp_model) File "/usr/local/lib/python2.7/dist- packages/django/db/backends/base/schema.py", line 268, in create_model columns = [model._meta.get_field(field).column for field in fields] File "/usr/local/lib/python2.7/dist- packages/django/db/models/options.py", line 554, in get_field raise FieldDoesNotExist('%s has no field named %r' % (self.object_name, field_name)) django.core.exceptions.FieldDoesNotExist: Forum_subscriptions has no field named None }}} -- Ticket URL: <https://code.djangoproject.com/ticket/24563#comment:3> Django <https://code.djangoproject.com/> The Web framework for perfectionists with deadlines. -- You received this message because you are subscribed to the Google Groups "Django updates" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-updates+unsubscr...@googlegroups.com. To post to this group, send email to django-updates@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-updates/064.1723718637d93b4cfbc425d35ab2fcf6%40djangoproject.com. For more options, visit https://groups.google.com/d/optout.