i have a mini blog app, and a 'timeline' . there i want to be displayed all the posts from all the friends of a user, plus the posts of that user himself. For that, i have to make some kind of a 'join' between the results of two queries (queries on the same table) , so that the final result will b开发者_如何学Goe the combination of the user - possessor of the account, and all his friends. My query looks like this:
blog = New.objects.filter(created_by = following,created_by = request.user)
By that ',' I wanted to make a 'join' - I found something like this on a doc- but this method is not correct - I'm getting an error.
How else could be done this 'join' ?
You can use Django Q
(query parameter) objects to create complex queries with logical operators (&
, |
, and ~
). You can also use __
(double underscore) to join in query parameters.
# is this what you want?
blog = New.objects.filter( Q(created_by__followed_by = request.user)
|Q(created_by = request.user) )
For more details see http://docs.djangoproject.com/en/dev/topics/db/queries/#complex-lookups-with-q-objects.
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