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LookupError: App 'dynamic_preferences' doesn't have a 'userpreferencemodel' model. #141

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gonvaled opened this issue Apr 23, 2018 · 6 comments
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LookupError: App 'dynamic_preferences' doesn't have a 'userpreferencemodel' model. #141

gonvaled opened this issue Apr 23, 2018 · 6 comments

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@gonvaled
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gonvaled commented Apr 23, 2018 •
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Starting with a blank database, I am having problems running migrations:

    $ python manage.py migrate

    Applying dynamic_preferences.0001_initial...Traceback (most recent call last):
      File "/usr/local/lib/python3.5/site-packages/django/apps/config.py", line 163, in get_model
        return self.models[model_name.lower()]
    KeyError: 'userpreferencemodel'
    
    During handling of the above exception, another exception occurred:
    
    Traceback (most recent call last):
      File "manage.py", line 22, in <module>
        execute_from_command_line(sys.argv)
      File "/usr/local/lib/python3.5/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line
        utility.execute()
      File "/usr/local/lib/python3.5/site-packages/django/core/management/__init__.py", line 359, in execute
        self.fetch_command(subcommand).run_from_argv(self.argv)
      File "/usr/local/lib/python3.5/site-packages/django/core/management/base.py", line 294, in run_from_argv
        self.execute(*args, **cmd_options)
      File "/usr/local/lib/python3.5/site-packages/django/core/management/base.py", line 345, in execute
        output = self.handle(*args, **options)
      File "/usr/local/lib/python3.5/site-packages/django/core/management/commands/migrate.py", line 204, in handle
        fake_initial=fake_initial,
      File "/usr/local/lib/python3.5/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 "/usr/local/lib/python3.5/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 "/usr/local/lib/python3.5/site-packages/django/db/migrations/executor.py", line 244, in apply_migration
        state = migration.apply(state, schema_editor)
      File "/usr/local/lib/python3.5/site-packages/django/db/migrations/migration.py", line 129, in apply
        operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
      File "/usr/local/lib/python3.5/site-packages/django/db/migrations/operations/models.py", line 95, in database_forwards
        if self.allow_migrate_model(schema_editor.connection.alias, model):
      File "/usr/local/lib/python3.5/site-packages/django/db/migrations/operations/base.py", line 115, in allow_migrate_model
        return router.allow_migrate_model(connection_alias, model)
      File "/usr/local/lib/python3.5/site-packages/django/db/utils.py", line 311, in allow_migrate_model
        model=model,
      File "/usr/local/lib/python3.5/site-packages/django/db/utils.py", line 300, in allow_migrate
        allow = method(db, app_label, **hints)
      File "/usr/local/lib/python3.5/site-packages/rest_models/router.py", line 105, in allow_migrate
        model = apps.get_model(app_label, model_name)
      File "/usr/local/lib/python3.5/site-packages/django/apps/registry.py", line 195, in get_model
        return self.get_app_config(app_label).get_model(model_name.lower())
      File "/usr/local/lib/python3.5/site-packages/django/apps/config.py", line 166, in get_model
        "App '%s' doesn't have a '%s' model." % (self.label, model_name))
    LookupError: App 'dynamic_preferences' doesn't have a 'userpreferencemodel' model.

Doing showmigrations I see:

    $ python manage.py showmigrations

    ...
     [X] 0007_alter_validators_add_error_messages
     [X] 0008_alter_user_username_max_length
    captcha
     [X] 0001_initial
    contenttypes
     [X] 0001_initial
     [X] 0002_remove_content_type_name
    database
     [X] 0001_initial
    dynamic_preferences
     [ ] 0001_initial
     [ ] 0002_auto_20150712_0332
     [ ] 0003_auto_20151223_1407
     [ ] 0004_move_user_model
    dynamic_preferences_users
     [ ] 0001_initial
    ...

What could be the problem?
@gonvaled gonvaled changed the title Problems in migrations for dynamic_preferences LookupError: App 'dynamic_preferences' doesn't have a 'userpreferencemodel' model. Apr 23, 2018
@gonvaled
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In development, removing all migrations for dynamic_preferences and recreating them works:

  ...
  Applying dynamic_preferences.0001_initial... OK
  Applying dynamic_preferences_users.0001_initial... OK
  ...

But this is not an acceptable workaround because I can not run this in production, where I can not remove the migrations of third-party applications.

@marcofvera
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marcofvera commented Jun 13, 2018 •
edited
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I'm having a similar issue with a blank database but in my case it seems something related to global_preference_form_builder() function.

I can't do anything in my django environment. Any command I enter I receive this error (including python manage.py migrate):

Traceback (most recent call last):
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py", line 328, in execute
    return Database.Cursor.execute(self, query, params)
sqlite3.OperationalError: no such table: dynamic_preferences_globalpreferencemodel

@agateblue
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Hi @gonvaled and @marcofvera.

I'm sorry for remaining silent for such a long time. I have little times these days.

I think the issue you're facing is caused by #140. I'll take a few hours today to start a new project, reproduce the issue and find a possible workaround.

@agateblue agateblue mentioned this issue Jun 14, 2018
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@agateblue
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@marcofvera I cannot reproduce your issue, so I'd like to know more about your project. Is there any minimum code that reproduces the issue you could share ? Or at least a full stack trace ?

agateblue pushed a commit that referenced this issue Jun 15, 2018
@EliotBerriot
Fixed #140 and possibly #141: cleaned migration mess
284d0b2
agateblue pushed a commit that referenced this issue Jun 15, 2018
@EliotBerriot
Fixed #140 and possibly #141: cleaned migration mess
adcc1b6
agateblue pushed a commit that referenced this issue Jun 16, 2018
@EliotBerriot
Fixed #140 and possibly #141: cleaned migration mess
dd00656
agateblue pushed a commit that referenced this issue Jun 17, 2018
@EliotBerriot
Cleanup migrations (#142)
d0afd8f 
See #141 and #140, migration cleanup and django2/python3.6 compat
@marcofvera
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@EliotBerriot I'm sorry for the delay.. I just saw your comment now. I've tried to use the version 1.6 but still not working on my environment. Here is the full stack trace:

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
    utility.execute()
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/core/management/__init__.py", line 356, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/core/management/base.py", line 283, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/core/management/base.py", line 327, in execute
    self.check()
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/core/management/base.py", line 359, in check
    include_deployment_checks=include_deployment_checks,
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/core/management/base.py", line 346, in _run_checks
    return checks.run_checks(**kwargs)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/core/checks/registry.py", line 81, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/core/checks/urls.py", line 16, in check_url_config
    return check_resolver(resolver)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/core/checks/urls.py", line 26, in check_resolver
    return check_method()
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/urls/resolvers.py", line 254, in check
    for pattern in self.url_patterns:
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/utils/functional.py", line 35, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/urls/resolvers.py", line 405, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/utils/functional.py", line 35, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/urls/resolvers.py", line 398, in urlconf_module
    return import_module(self.urlconf_name)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/Users/marco/git/funnydation/funnydation/funnydation/urls.py", line 7, in <module>
    from funnydation.views import HomeView, LoginView, LogoutView, PreferencesView
  File "/Users/marco/git/funnydation/funnydation/funnydation/views.py", line 42, in <module>
    class PreferencesView(FormMixin, TemplateView):
  File "/Users/marco/git/funnydation/funnydation/funnydation/views.py", line 43, in PreferencesView
    form_class = global_preference_form_builder(section='general')
  File "/Users/marco/funnydation/lib/python3.6/site-packages/dynamic_preferences/forms.py", line 126, in global_preference_form_builder
    return preference_form_builder(GlobalPreferenceForm, preferences, **kwargs)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/dynamic_preferences/forms.py", line 109, in preference_form_builder
    section=preference.section.name, name=preference.name)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/dynamic_preferences/managers.py", line 146, in get_db_pref
    pref = self.queryset.get(section=section, name=name)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/db/models/query.py", line 374, in get
    num = len(clone)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/db/models/query.py", line 232, in __len__
    self._fetch_all()
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/db/models/query.py", line 1118, in _fetch_all
    self._result_cache = list(self._iterable_class(self))
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/db/models/query.py", line 53, in __iter__
    results = compiler.execute_sql(chunked_fetch=self.chunked_fetch)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 899, in execute_sql
    raise original_exception
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 889, in execute_sql
    cursor.execute(sql, params)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/db/backends/utils.py", line 79, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/db/utils.py", line 94, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/utils/six.py", line 685, in reraise
    raise value.with_traceback(tb)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
  File "/Users/marco/funnydation/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py", line 328, in execute
    return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: no such table: dynamic_preferences_globalpreferencemodel

Here is part of the code where I'm using the global_preference_form_builder() function:

class PreferencesView(FormMixin, TemplateView):
    form_class = global_preference_form_builder(section='general')
    success_url = reverse_lazy('preferences')
    template_name = 'preferences.html'

@agateblue
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@marcofvera this happens because you are creating the form at module level, which requires database access.

Return the form class from the get_form_class method instead :)

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@gonvaled @agateblue @marcofvera