Django：创建自定义用户时，ValueError：对未知应用程序的依赖

Question

I'm building a brand-new web project with Python 3.4.3 and Django 1.8 without any migrations made so far. For the project, I'm creating a custom user inheriting from AbstractBaseUser in an app called users . I've also correctly referred AUTH_USER_MODEL to the custom user in settings.py , before creating any migrations, as mentioned in the doc .

However, when I tried to run python manage.py makemigrations users or python manage.py migrate , the console reports ValueError: Dependency on unknown app: users .

I'm pretty sure my code for the custom user model is correct because I followed documentation's example code, and also because, when I commented out AUTH_USER_MODEL , everything else worked fine except that Django created tables for the default User model, which is expected.

In the documentation it is mentioned that:

you must ensure that the model referenced by AUTH_USER_MODEL is created in the first migration of its app (usually called 0001_initial); otherwise, you will have dependency issues.

I'm not very sure what exactly this means. Does it mean that I have to manually create a migration for my users app? If so, how exactly should I do it?

I greatly appreciate any suggestion or redirection to a credible source! Thank you very much in advance!

Answer 1

So after trying various approaches to tackle the problem, I found that the problem lie in an accidental mistake. In the users directory, I've deleted all the files in migrations directory including its __init__.py . If there is no __init__.py file, the ValueError will be thrown. If you manually add the __init__.py file, everything works like a charm.

To those having the same problem, good luck!

Answer 2

For Django 3.2 deleting the migrations directory in the users directory and running

python manage.py makemigrations users
python manage.py migrate

worked for me.