I'm using regular Django tests for my Django models, using
./manage.py test non_wagtail_app_name
but all of sudden (and after adding some Wagtail models), I can't run them:
Creating test database for alias 'default'...
Traceback (most recent call last):
File "./manage.py", line 12, in <module>
execute_from_command_line(sys.argv)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
utility.execute()
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/core/management/__init__.py", line 356, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/core/management/commands/test.py", line 29, in run_from_argv
super(Command, self).run_from_argv(argv)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/core/management/base.py", line 283, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/core/management/base.py", line 330, in execute
output = self.handle(*args, **options)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/core/management/commands/test.py", line 62, in handle
failures = test_runner.run_tests(test_labels)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/test/runner.py", line 601, in run_tests
old_config = self.setup_databases()
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/test/runner.py", line 546, in setup_databases
self.parallel, **kwargs
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/test/utils.py", line 187, in setup_databases
serialize=connection.settings_dict.get('TEST', {}).get('SERIALIZE', True),
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/db/backends/base/creation.py", line 69, in create_test_db
run_syncdb=True,
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/core/management/__init__.py", line 131, in call_command
return command.execute(*args, **defaults)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/core/management/base.py", line 330, in execute
output = self.handle(*args, **options)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 204, in handle
fake_initial=fake_initial,
File "/home/fleon/development/virmyasb/lib/python3.6/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 "/home/fleon/development/virmyasb/lib/python3.6/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 "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/db/migrations/executor.py", line 244, in apply_migration
state = migration.apply(state, schema_editor)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/db/migrations/migration.py", line 129, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/db/migrations/operations/fields.py", line 88, in database_forwards
field,
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 431, in add_field
definition, params = self.column_sql(model, field, include_default=True)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 171, in column_sql
default_value = self.effective_default(field)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 245, in effective_default
default = field.get_db_prep_save(default, self.connection)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/db/models/fields/__init__.py", line 770, in get_db_prep_save
prepared=False)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/django/db/models/fields/__init__.py", line 762, in get_db_prep_value
value = self.get_prep_value(value)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/wagtail/core/fields.py", line 106, in get_prep_value
return json.dumps(self.stream_block.get_prep_value(value), cls=DjangoJSONEncoder)
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/wagtail/core/blocks/stream_block.py", line 252, in get_prep_value
for child in value # child is a StreamChild instance
File "/home/fleon/development/virmyasb/lib/python3.6/site-packages/wagtail/core/blocks/stream_block.py", line 252, in <listcomp>
for child in value # child is a StreamChild instance
AttributeError: 'str' object has no attribute 'block'
The traceback seems to come from the Wagtail part of my project (my Wagtail models use StreamFields and BlockFields), so it seems I'm missing something (putting fixtures for my Wagtail objects), but I'm clueless where to start from (I haven't setup Wagtail tests yet - yes, I know, I should). The app I want to test doesn't use anything from Wagtail.
The only thing that works is pg_dumping my Postgres database, edit the database name in the generated file, importing it into test_postgres and passing the -k switch to manage.py test, so it's quite obvious I need to prefill the Wagtail tables. However, using fixtures in the Django models tests doesn't fix the problem...
This is failing while running migrations. Digging through the stack trace, my best guess is that:
StreamField to an existing page model, as a required (null=False) fieldIf so, the fix is to edit the offending migration and change the default value on the StreamField to an empty string.