AppRegistryNotReady exception since update from 1.8.7 to 1.9

[stephanm]

Hi,

I have a script which worked in django 1.8
but does no more in django 1.9, I get the exception:
django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet

Unfortunately I didn't find a hint in the release notes

from myapp.models import MyModel1 # here is the exception
...
if __name__ == "__main__":
    
    import django
    django.setup()
    # my code follows

[Baptiste Mispelon]

Hi,

We can't really reproduce your issue without the definition of your models.
Is there a way you could provide them (ideally, a simplified version that still reproduces the issue).

Thanks.

[stephanm]

I tried but I didn't get it :-(

Actually I use the following workaround:

# at the beginning of the file before the first import:
if __name__ == "__main__":
    import django
    django.setup()
# now the imports ...
from myapp.models import MyModel1 # here is the exception
...
if __name__ == "__main__":
    # skipped here ...
    #    import django
    #    django.setup()
    # my code follows

I can live with this so you can close the ticket it if you like,
if I find a way to reproduce it in a simple "example" I will open it again.

[Aymeric Augustin]

This is the expected behavior. You need to setup Django before importing models.

To avoid the extra if __name__ == '__main__' I think we should make django.setup() idempotent.

I'll write to the DevelopersMailingList about this idea.

[Aymeric Augustin]

I filed #27176 to improve the behavior in this area, but I'm not sure that's the problem you were hitting.