CODEWITHSUNDEEP
pythondatabasedjango
city
city

Reputation: 261

How to specify what database django should use when aauthenticating a user?

I figured out how to get the User created in a secondary database but I can't figure out what I should use in order to get the database to use the secondary database instead of the default database when looking if a User exists and then can be authenticated.

Say I have:

user = authenticate(username=username, password=password)

how do i tell django to use a database named secondary instead of using the default database?

Also, I assume that these follow along the same methods but how would i use login() or logout() by using the secondary database as well.

Upvotes: 0

Views: 438

Answers (1)

Skylar Saveland
Skylar Saveland

Reputation: 11464

authenticate only takes credentials and is a shortcut to calling authenticate on your backends until you get a user:

https://github.com/django/django/blob/master/django/contrib/auth/init.py#L39

Assuming you are using the default backend ( https://github.com/django/django/blob/master/django/contrib/auth/backends.py#L4 ), there is no way to use this backend and select the non-default database, I think.

from django.contrib.auth.backends import ModelBackend

class NonDefaultModelBackend(ModelBackend):
    """
    Authenticates against django.contrib.auth.models.User.
    Using SOMEOTHER db rather than the default
    """
    supports_inactive_user = True

    def authenticate(self, username=None, password=None):
        try:
            user = User.objects.using("SOMEOTHER").get(username=username)
            if user.check_password(password):
                return user
        except User.DoesNotExist:
            return None

    def get_user(self, user_id):
        try:
            return User.objects.using("SOMEOTHER").get(pk=user_id)
        except User.DoesNotExist:
            return None

I think this will give you the same behavior as the default backend but with the non-default db. Then you can add your backend to the settings or replace the default backend outright.

AUTHENTICATION_BACKENDS = (
    'path.to.mybackends.NonDefaultModelBackend', 
    'django.contrib.auth.backends.ModelBackend',)

or so.

Upvotes: 1

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