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auth: delay access to model #265

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auth: delay access to model #265

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11 changes: 8 additions & 3 deletions knox/auth.py
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,6 @@ def compare_digest(a, b):
)

from knox.crypto import hash_token
from knox.models import AuthToken
from knox.settings import CONSTANTS, knox_settings
from knox.signals import token_expired

Expand All @@ -31,7 +30,13 @@ class TokenAuthentication(BaseAuthentication):
- `request.user` will be a django `User` instance
- `request.auth` will be an `AuthToken` instance
'''
model = AuthToken
model = None

def get_model(self):
if self.model is not None:
return self.model
from knox.models import AuthToken
return AuthToken

def authenticate(self, request):
auth = get_authorization_header(request).split()
Expand Down Expand Up @@ -62,7 +67,7 @@ def authenticate_credentials(self, token):
'''
msg = _('Invalid token.')
token = token.decode("utf-8")
for auth_token in AuthToken.objects.filter(
for auth_token in self.get_model().objects.filter(
token_key=token[:CONSTANTS.TOKEN_KEY_LENGTH]):
if self._cleanup_token(auth_token):
continue
Expand Down