Add custom field to Django Rest Framework generation token - oauth-2.0

Question

With Django Rest Framework i try to add a custom field (clan) when i want to generate token, it should be a required field and an existing clan.
Like :
curl -X POST -d "grant_type=password&username=username&password=password&client_id=client_id&client_secret=client_secret&clan=ABCDEF" http://localhost:8000/o/token/
My User model :
class User(AbstractUser):
"""
User model.
"""
clans = models.ManyToManyField(Clan, related_name='Users')
My rest framework settings:
REST_FRAMEWORK = {
'DEFAULT_PAGINATION_CLASS': 'apps.core.api.pagination.StandardPagination',
'DEFAULT_PERMISSION_CLASSES': (
'rest_framework.permissions.IsAdminUser',
),
'DEFAULT_FILTER_BACKENDS': (
'django_filters.rest_framework.DjangoFilterBackend',
),
'DEFAULT_AUTHENTICATION_CLASSES': (
'oauth2_provider.contrib.rest_framework.OAuth2Authentication',
),
'DEFAULT_PERMISSION_CLASSES': (
'rest_framework.permissions.IsAuthenticated',
),
'EXCEPTION_HANDLER': 'apps.core.exceptions.api.custom_exception_handler',
}
Then i want a classic response:
{
"access_token": "azerty123456789",
"expires_in": 36000,
"token_type": "Bearer",
"scope": "read write groups",
"refresh_token": "azerty123456789"
}

Answer 1

Finally i found the solution :
You need to override the class TokenView from oauth2_provider.views.base then override the post method.
class MyCustomToken(TokenView):
"""
....
"""
#method_decorator(sensitive_post_parameters("password"))
def post(self, request, *args, **kwargs):
"""
...
"""
# Check if the clan parameter is given in parameter.
clan_parameter = request.POST.get('clan', False)
if not clan_parameter:
return JsonResponse(
{'clan': 'Parameter is required.'},
status = 401
)
url, headers, body, status = self.create_token_response(request)
if status == 200:
access_token = json.loads(body).get("access_token")
if access_token is not None:
token = get_access_token_model().objects.get(
token=access_token)
app_authorized.send(
sender=self, request=request,
token=token)
response = HttpResponse(content=body, status=status)
for k, v in headers.items():
response[k] = v
return response