Getting User object from username in django

Question

I am trying the following code in a django celery task ``` @app.task def search(q, userstring): uid = User.objects.get(username=userstring) messages.info(uid, 'Initiating search in background.') [...] ``` My view is calling it as follows: ``` search.delay(self.request.user.get_username(), form.instance.query) ``` I am getting the following error: ``` >[2014-06-05 12:04:04,352: ERROR/MainProcess] Task listthings.tasks.search[5aaa77b4-c7be-4d6a-9127-626e63d0dfbe] raised unexpected: DoesNotExist('User matching query does not >exist.',) Traceback (most recent call last): File "/webapps/wcw/local/lib/python2.7/site-packages/celery/app/trace.py", line 240, in trace_task R = retval = fun(*args, **kwargs) File "/webapps/wcw/local/lib/python2.7/site-packages/celery/app/trace.py", line 437, in __protected_call__ return self.run(*args, **kwargs) __File "/webapps/wcw/webcamwatch/listcams/tasks.py", line 44, in search uid = User.objects.get(username=userstring)__ File "/webapps/wcw/local/lib/pytho…

Accepted Answer

There's nothing wrong with the way you're querying for the user. The problem with your code is that you have passed the variables in the wrong order: the task is expecting `(q, userstring)` but you are passing `(username, query)`.

However I wonder why you are querying on username at all when you could simply pass the primary key of the User instance:

```
def search(q, user_id):
    uid = User.objects.get(pk=user_id)
```

and call it:

```
search.delay(form.instance.query, self.request.user.pk)
```

Getting User object from username in django

Solution

Problem