I think the end of the traceback is pretty telling: ValueError: Lookup failed for model referenced by field quedar.LearningGroup.members: quedar.User
You have a LearningGroup model with an attribute called members which is still referencing the original User model that was removed. -James On Mar 22, 2015 11:45 AM, "Markus Holtermann" <i...@markusholtermann.eu> wrote: > Hi, > > from the information you provided I can only guess you are migrating away > from a custom user model to the "normal" Django user model. This won't work > (out of the box). And even the way to migrate from the Django user model to > a custom user model is more of a workaround than a solution. Please see > https://docs.djangoproject.com/en/dev/topics/auth/customizing/#substituting-a-custom-user-model > for details. > > /Markus > > On March 22, 2015 7:16:57 PM GMT+01:00, somenxav...@gmail.com wrote: > >Hi, > > > >makemigrations works but migrate does not: > > > >[xan@mercuri gargamella]$ python manage.py makemigrations > >Migrations for 'quedar': > > 0003_auto_20150322_1813.py: > > - Create model Persona > > - Delete model User > > - Add field user to persona > > - Alter field members on dialectgroup > > - Alter field members on languagelevelgroup > > - Alter field members on learninggroup > > - Alter field members on learningpeople > > - Alter field members on teachinggroup > >[xan@mercuri gargamella]$ python manage.py migrate > >Operations to perform: > > Apply all migrations: admin, auth, sessions, contenttypes, quedar > >Running migrations: > >Applying quedar.0003_auto_20150322_1813...Traceback (most recent call > >last > >): > >File "/usr/lib/python3.4/site-packages/django/apps/config.py", line > >163, > >in get_model > > return self.models[model_name.lower()] > >KeyError: 'user' > > > >During handling of the above exception, another exception occurred: > > > >Traceback (most recent call last): > >File "/usr/lib/python3.4/site-packages/django/db/migrations/state.py", > >line 84, in render > > model = self.apps.get_model(lookup_model[0], lookup_model[1]) > >File "/usr/lib/python3.4/site-packages/django/apps/registry.py", line > >202, > >in get_model > > return self.get_app_config(app_label).get_model(model_name.lower()) > >File "/usr/lib/python3.4/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 'quedar' doesn't have a 'user' model. > > > >During handling of the above exception, another exception occurred: > > > >Traceback (most recent call last): > > File "manage.py", line 10, in <module> > > execute_from_command_line(sys.argv) > > File > >"/usr/lib/python3.4/site-packages/django/core/management/__init__.py", > >line > >385, in execute_from_command_line > > utility.execute() > > File > >"/usr/lib/python3.4/site-packages/django/core/management/__init__.py", > >line > >377, in execute > > self.fetch_command(subcommand).run_from_argv(self.argv) > >File "/usr/lib/python3.4/site-packages/django/core/management/base.py", > > > >line 288, in run_from_argv > > self.execute(*args, **options.__dict__) > >File "/usr/lib/python3.4/site-packages/django/core/management/base.py", > > > >line 338, in execute > > output = self.handle(*args, **options) > > File > > >"/usr/lib/python3.4/site-packages/django/core/management/commands/migrate.py", > > > >line 161, in handle > > executor.migrate(targets, plan, fake=options.get("fake", False)) > >File > >"/usr/lib/python3.4/site-packages/django/db/migrations/executor.py", > >line 68, in migrate > > self.apply_migration(migration, fake=fake) > >File > >"/usr/lib/python3.4/site-packages/django/db/migrations/executor.py", > >line 102, in apply_migration > > migration.apply(project_state, schema_editor) > > File > >"/usr/lib/python3.4/site-packages/django/db/migrations/migration.py", > >line > >108, in apply > > operation.database_forwards(self.app_label, schema_editor, > >project_state, new_state) > > File > > >"/usr/lib/python3.4/site-packages/django/db/migrations/operations/fields.py", > > > >line 29, in database_forwards > > to_model = to_state.render().get_model(app_label, self.model_name) > >File "/usr/lib/python3.4/site-packages/django/db/migrations/state.py", > >line 94, in render > >raise ValueError(msg.format(field=operations[0][1], > >model=lookup_model)) > >ValueError: Lookup failed for model referenced by field > >quedar.LearningGroup.members: quedar.User > >[xan@mercuri gargamella]$ > > > > > > > >Any hints? > > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to django-users+unsubscr...@googlegroups.com. > To post to this group, send email to django-users@googlegroups.com. > Visit this group at http://groups.google.com/group/django-users. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-users/97C9627D-9E65-4943-8BD7-6069E3288383%40markusholtermann.eu > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Django users" group. 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