Re: After changing User.username to PhoneNumberField I can't migrate

Thank you, Laura, for your input.

I found the problem related to the `django-guardian` pacakge which seems to create an anonymous user when I issue `manage.py migrate` which has a username of "AnonymousUser" and that, of course, doesn't pass the validation error of `PhoneNumberField` which has to be a valid phone number.

the full problem is described here if you're curious to take a look:

https://stackoverflow.com/questions/58731242/altering-the-username-of-the-user-model-to-use-phonenumberfield-instead-of-charf/58731243#58731243

Thanks again.

On Wednesday, 6 November 2019 14:46:04 UTC+2, Laura Pérez wrote:

I was having a similar error yesterday, after adding another field to my model I ran the migrations and was giving me an error as if I was overwriting another field. 

After a time searching for an answer for me ,the solution was (and I know this is not a good practice) delete all the migration files and run the migrations again. 

Then again, If someone knows a better solution... 

Em qua, 6 de nov de 2019 às 09:37, Ahmed Shahwan <dev.ahm...@gmail.com> escreveu:

Hello everybody,

I work on a project started from the cookiecutter-django, and I altered the username of the User model to use `PhoneNumberField` from django-phonenumber-field package instead of the ordinary `models.CharField` and made the necessary changes, then I issued `manage.py makemigrations` which worked fine.

But when I run `manage.py migrate` I get this error:

Traceback (most recent call last):

  File "./manage.py", line 30, in <module>

    execute_from_command_line(sys.argv)

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line

    utility.execute()

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/core/management/__init__.py", line 375, in execute

    self.fetch_command(subcommand).run_from_argv(self.argv)

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/core/management/base.py", line 323, in run_from_argv

    self.execute(*args, **cmd_options)

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/core/management/base.py", line 364, in execute

    output = self.handle(*args, **options)

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/core/management/base.py", line 83, in wrapped

    res = handle_func(*args, **kwargs)

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/core/management/commands/migrate.py", line 257, in handle

    self.verbosity, self.interactive, connection.alias, apps=post_migrate_apps, plan=plan,

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/core/management/sql.py", line 51, in emit_post_migrate_signal

    **kwargs

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/dispatch/dispatcher.py", line 175, in send

    for receiver in self._live_receivers(sender)

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/dispatch/dispatcher.py", line 175, in <listcomp>

    for receiver in self._live_receivers(sender)

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/guardian/management/__init__.py", line 33, in create_anonymous_user

    User.objects.get(**lookup)

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/db/models/manager.py", line 82, in manager_method

    return getattr(self.get_queryset(), name)(*args, **kwargs)

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/db/models/query.py", line 399, in get

    clone = self.filter(*args, **kwargs)

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/db/models/query.py", line 892, in filter

    return self._filter_or_exclude(False, *args, **kwargs)

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/db/models/query.py", line 910, in _filter_or_exclude

    clone.query.add_q(Q(*args, **kwargs))

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/db/models/sql/query.py", line 1290, in add_q

    clause, _ = self._add_q(q_object, self.used_aliases)

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/db/models/sql/query.py", line 1318, in _add_q

    split_subq=split_subq, simple_col=simple_col,

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/db/models/sql/query.py", line 1251, in build_filter

    condition = self.build_lookup(lookups, col, value)

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/db/models/sql/query.py", line 1116, in build_lookup

    lookup = lookup_class(lhs, rhs)

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/db/models/lookups.py", line 20, in __init__

    self.rhs = self.get_prep_lookup()

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/django/db/models/lookups.py", line 70, in get_prep_lookup

    return self.lhs.output_field.get_prep_value(self.rhs)

  File "/home/ahsh/.local/share/virtualenvs/communities_dj_backend/lib/python3.7/site-packages/phonenumber_field/modelfields.py", line 83, in get_prep_value

    raise ValueError(""%s" is not a valid phone number." % value.raw_input)

ValueError: "AnonymousUser" is not a valid phone number.

I googled for a while and don't get what's going on. Any ideas?

Thanks.

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