ValueError in Django when running the “python mana

问题:

I needed to add more fields to Django's User model, so I created a custom model class (named Accounts in an app named accounts) that extends Django's AbstractUser class.

After that, I updated my settings.py file, defining the AUTH_USER_MODEL property:

AUTH_USER_MODEL = 'accounts.Accounts'

I then created a migration file for the custom model using the python manage.py makemigrations command.

After that, I ran the python manage.py migrate command and I got this error message:

ValueError: The field admin.LogEntry.user was declared with a lazy reference to 'accounts.accounts', but app 'accounts' isn't installed.

What's the cause of the error and how can I fix it?

UPDATE: Now, if i run the python manage.py makemigrations command, I get this error message:

ValueError: The field admin.LogEntry.user was declared with a lazy reference to 'accounts.accounts', but app 'accounts' doesn't provide model 'accounts'.

回答1:

You just delete your previous 0001_initial.py in the migrations folder and try doing the makemigration and migrate again

回答2:

It's just because you have already an instance of default user model I think. Start a new project and migrate your models again and it should work.

回答3:

You didn't add accounts to your INSTALLED_APPS. From the comment, I can see accounts.apps.AccountsConfig in your list of apps. Instead of it, just add accounts to your INSTALLED_APPS

回答4:

I too had a similar problem when I changed the name of one of my apps, I had to delete migrations files at two locations, all migrations for the specific app migration folder, then migrations at "Your-project-env/lib/python3.5/site-packages/django/contrib/admin/migrations".

回答5:

I have the similar problem. It is the admin app has the cache and migrations history. I solve it by deleting all the cache and migrations history record(pycache file, and 0001.intial etc., keep init.py only) in YouProject\lib\site-packages\django\contrib\admin\migrations