Hello Maninder, Thanks for your answer, it's finally working now after adding a dependency to the initial migration file. See Bruckner's answer and my other reply for more details.
Best regards, Adrien On Tuesday, January 21, 2020 at 9:19:24 AM UTC+1, maninder singh Kumar wrote: > > In your database there is a table called django_migrations. Delete all > references in it to any other migration than the initial one. > > > [image: --] > > Maninder Kumar > [image: http://]about.me/maninder.s.kumar > <http://about.me/maninder.s.kumar?promo=email_sig> > > > > > On Tue, Jan 21, 2020 at 1:37 AM Adrien Agnel <[email protected] > <javascript:>> wrote: > >> Hi everyone, >> >> This is my first post in this group so do not hesitate to ask for some >> more specific details if this is not enough. Django version is 2.2.9, >> Python 3.6. >> >> >> I'm facing an error when trying to migrate back the initial migration of >> a freshly installed new application 'billing'. >> The error message is the following one : >> >>> *ValueError: The field form.Form.ticket_description was declared with a >>> lazy reference to 'tickets.ticketdescription', but app 'tickets' doesn't >>> provide model 'ticketdescription'.* >> >> >> *However the model 'ticketdescription' has been dropped several month ago >> and is no longer present in my project*. Thus the part " app 'tickets' >> doesn't provide model 'ticketdescription' " is perfectly right, but I don't >> get why it is not managed by the migration of app 'tickets' which dropped >> the model 'ticketdescription'. >> The model 'ticketdescription' remains as a pending model of state apps in >> the migration executor, I would expect it to be removed. >> >> Until now, I could migrate backward other apps without any issue but >> after adding the app 'billing', which is not directly related to app >> 'tickets', it is not possible anymore. >> >> >> >> I don't know where to look at to fix this issue ? Could you help me >> debugging please ? This looks like a bug but I'm not sure ! >> >> Best regards, >> Adrien >> >> >> >> >> Here is the full error trace : >> >> Traceback (most recent call last): >>> File "manage.py", line 23, in <module> >>> execute_from_command_line(sys.argv) >>> File >>> "[...]/lib/python3.6/site-packages/django/core/management/__init__.py", >>> line 381, in execute_from_command_line >>> utility.execute() >>> File >>> "[...]/lib/python3.6/site-packages/django/core/management/__init__.py", >>> line 375, in execute >>> self.fetch_command(subcommand).run_from_argv(self.argv) >>> File >>> "[...]/lib/python3.6/site-packages/django/core/management/base.py", line >>> 323, in run_from_argv >>> self.execute(*args, **cmd_options) >>> File >>> "[...]/lib/python3.6/site-packages/django/core/management/base.py", line >>> 364, in execute >>> output = self.handle(*args, **options) >>> File >>> "[...]/lib/python3.6/site-packages/django/core/management/base.py", line >>> 83, in wrapped >>> res = handle_func(*args, **kwargs) >>> File >>> "[...]/lib/python3.6/site-packages/django/core/management/commands/migrate.py", >>> >>> line 234, in handle >>> fake_initial=fake_initial, >>> File >>> "[...]/lib/python3.6/site-packages/django/db/migrations/executor.py", line >>> 121, in migrate >>> state = self._migrate_all_backwards(plan, full_plan, fake=fake) >>> File >>> "[...]/lib/python3.6/site-packages/django/db/migrations/executor.py", line >>> 173, in _migrate_all_backwards >>> for migration, _ in full_plan: >>> File "[...]/lib/python3.6/site-packages/django/utils/functional.py", >>> line 80, in __get__ >>> res = instance.__dict__[self.name] = self.func(instance) >>> File >>> "[...]/lib/python3.6/site-packages/django/db/migrations/state.py", line >>> 210, in apps >>> return StateApps(self.real_apps, self.models) >>> File >>> "[...]/lib/python3.6/site-packages/django/db/migrations/state.py", line >>> 280, in __init__ >>> raise ValueError("\n".join(error.msg for error in errors)) >>> ValueError: The field form.Form.ticket_description was declared with a >>> lazy reference to 'tickets.ticketdescription', but app 'tickets' doesn't >>> provide model 'ticketdescription'. >> >> -- >> 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 [email protected] <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/django-users/4f876052-71e5-4d25-9382-59d3c30d19f8%40googlegroups.com >> >> <https://groups.google.com/d/msgid/django-users/4f876052-71e5-4d25-9382-59d3c30d19f8%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/dbac916c-d50f-477e-a4ee-2e42d9a49115%40googlegroups.com.
