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Prefetching the user object when getting the token in TokenAuthentication.

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Since the user object is fetched 4 lines after getting Token from the database, this removes a DB query for each token-authenticated request.
This commit is contained in:
Ofir Ovadia 2015-02-04 16:08:41 +02:00
parent 46181341d5
commit 58e7bbc8ec
2 changed files with 7 additions and 1 deletions
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2
rest_framework/authentication.py
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@ -167,7 +167,7 @@ class TokenAuthentication(BaseAuthentication):
def authenticate_credentials(self, key):
try:
token = self.model.objects.get(key=key)
token = self.model.objects.select_related('user').get(key=key)
except self.model.DoesNotExist:
raise exceptions.AuthenticationFailed('Invalid token')

6
tests/test_authentication.py
View File

@ -202,6 +202,12 @@ class TokenAuthTests(TestCase):
response = self.csrf_client.post('/token/', {'example': 'example'}, format='json', HTTP_AUTHORIZATION=auth)
self.assertEqual(response.status_code, status.HTTP_200_OK)
def test_post_json_makes_one_db_query(self):
"""Ensure that authenticating a user using a token performs only one DB query"""
auth = "Token " + self.key
func_to_test = lambda: self.csrf_client.post('/token/', {'example': 'example'}, format='json', HTTP_AUTHORIZATION=auth)
self.assertNumQueries(1, func_to_test)
def test_post_form_failing_token_auth(self):
"""Ensure POSTing form over token auth without correct credentials fails"""
response = self.csrf_client.post('/token/', {'example': 'example'})