Attempting to migrate a project from Django 1.7 to 1.8. After dealing with code errors, I can start the migration. However, when I try to migrate, I get an error. Object "NoneType" has no attribute "_meta" "
There are no trace links in any of my applications, so I don’t know where exactly to look for the error (and also what code to include here, so that I can be more useful for those who are trying to help me)
Here is the full trace text
(venv) rtownley@ubuntu :~/Projects/sparrow1/NJ$ ./manage.py makemigrations No changes detected (venv) rtownley@ubuntu :~/Projects/sparrow1/NJ$ ./manage.py migrate Operations to perform: Synchronize unmigrated apps: staticfiles, editor, djcelery, messages, getty, kombu_transport_django, debug_toolbar, utils, locking, petro, tokenapi, grappelli, django_extensions, selectable Apply all migrations: adops, taxonomy, issues, editorial, contenttypes, authors, auth, comms, membership, sessions, bento, urlalias, accounts, breaking_news, easy_thumbnails, images, admin, pages, documents, events Synchronizing apps without migrations: Creating tables... Running deferred SQL... Installing custom SQL... Running migrations: Rendering model states...Traceback (most recent call last): File "./manage.py", line 10, in <module> execute_from_command_line(sys.argv) File "/home/rtownley/Projects/sparrow1/venv/lib/python3.4/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line utility.execute() File "/home/rtownley/Projects/sparrow1/venv/lib/python3.4/site-packages/django/core/management/__init__.py", line 330, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/home/rtownley/Projects/sparrow1/venv/lib/python3.4/site-packages/django/core/management/base.py", line 390, in run_from_argv self.execute(*args, **cmd_options) File "/home/rtownley/Projects/sparrow1/venv/lib/python3.4/site-packages/django/core/management/base.py", line 441, in execute output = self.handle(*args, **options) File "/home/rtownley/Projects/sparrow1/venv/lib/python3.4/site-packages/django/core/management/commands/migrate.py", line 221, in handle executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial) File "/home/rtownley/Projects/sparrow1/venv/lib/python3.4/site-packages/django/db/migrations/executor.py", line 104, in migrate state = migration.mutate_state(state, preserve=do_run) File "/home/rtownley/Projects/sparrow1/venv/lib/python3.4/site-packages/django/db/migrations/migration.py", line 83, in mutate_state operation.state_forwards(self.app_label, new_state) File "/home/rtownley/Projects/sparrow1/venv/lib/python3.4/site-packages/django/db/migrations/operations/fields.py", line 51, in state_forwards state.reload_model(app_label, self.model_name_lower) File "/home/rtownley/Projects/sparrow1/venv/lib/python3.4/site-packages/django/db/migrations/state.py", line 97, in reload_model related_models = get_related_models_recursive(old_model) File "/home/rtownley/Projects/sparrow1/venv/lib/python3.4/site-packages/django/db/migrations/state.py", line 57, in get_related_models_recursive rel_app_label, rel_model_name = rel_mod._meta.app_label, rel_mod._meta.model_name AttributeError: 'NoneType' object has no attribute '_meta'
Other pieces that could potentially be played: -I have a custom handler that listens for a save event, serializes the data and creates an identical object in Mongo -Operation from a virtual environment with Python3.4
Any thoughts on where to look for the bug hunt? Thank you and wish I could provide more code!