Public bug reported: (Be warned, I am a novice and this may be a novice mistake):
I mistakenly added a TimeField instead of a DurationField to my model. I was forced to give it a default value and chose TimeDelta(minutes=30). The makemigration worked, but the migrate command crashed with very unhelpful diagnostics, not even indicating which field caused the problem. I'm hoping that this lack of diagnostics could be improved, to at least point to the database column that caused the problem? Thanks in advance for all the good stuff you do :-) Simon Lambourn. Output from manage.py migrate: Operations to perform: Apply all migrations: admin, auth, contenttypes, kitten, sessions Running migrations: Applying kitten.0010_auto_20200428_0957...Traceback (most recent call last): File "manage.py", line 22, in <module> execute_from_command_line(sys.argv) File "/usr/lib/python3/dist-packages/django/core/management/__init__.py", line 364, in execute_from_command_line utility.execute() File "/usr/lib/python3/dist-packages/django/core/management/__init__.py", line 356, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/usr/lib/python3/dist-packages/django/core/management/base.py", line 283, in run_from_argv self.execute(*args, **cmd_options) File "/usr/lib/python3/dist-packages/django/core/management/base.py", line 330, in execute output = self.handle(*args, **options) File "/usr/lib/python3/dist-packages/django/core/management/commands/migrate.py", line 204, in handle fake_initial=fake_initial, File "/usr/lib/python3/dist-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 "/usr/lib/python3/dist-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 "/usr/lib/python3/dist-packages/django/db/migrations/executor.py", line 244, in apply_migration state = migration.apply(state, schema_editor) File "/usr/lib/python3/dist-packages/django/db/migrations/migration.py", line 129, in apply operation.database_forwards(self.app_label, schema_editor, old_state, project_state) File "/usr/lib/python3/dist-packages/django/db/migrations/operations/fields.py", line 88, in database_forwards field, File "/usr/lib/python3/dist-packages/django/db/backends/sqlite3/schema.py", line 240, in add_field self._remake_table(model, create_field=field) File "/usr/lib/python3/dist-packages/django/db/backends/sqlite3/schema.py", line 115, in _remake_table self.effective_default(create_field) File "/usr/lib/python3/dist-packages/django/db/backends/base/schema.py", line 245, in effective_default default = field.get_db_prep_save(default, self.connection) File "/usr/lib/python3/dist-packages/django/db/models/fields/__init__.py", line 770, in get_db_prep_save prepared=False) File "/usr/lib/python3/dist-packages/django/db/models/fields/__init__.py", line 2281, in get_db_prep_value value = self.get_prep_value(value) File "/usr/lib/python3/dist-packages/django/db/models/fields/__init__.py", line 2276, in get_prep_value return self.to_python(value) File "/usr/lib/python3/dist-packages/django/db/models/fields/__init__.py", line 2250, in to_python parsed = parse_time(value) File "/usr/lib/python3/dist-packages/django/utils/dateparse.py", line 76, in parse_time match = time_re.match(value) TypeError: expected string or bytes-like object ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: python3-django 1:1.11.22-1ubuntu1.3 ProcVersionSignature: Ubuntu 5.3.0-46.38-generic 5.3.18 Uname: Linux 5.3.0-46-generic x86_64 ApportVersion: 2.20.11-0ubuntu8.8 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Tue Apr 28 09:59:25 2020 PackageArchitecture: all SourcePackage: python-django UpgradeStatus: Upgraded to eoan on 2019-10-23 (187 days ago) ** Affects: python-django (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug eoan -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875596 Title: Django Timefield(default=<TimeDelta>) gives unhelpful diagnostics To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-django/+bug/1875596/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs