CODEWITHSUNDEEP
pythondjangodjango-modelsdjango-queryset
Brenden
Brenden

Reputation: 8774

Django query foreign object that occurs more than once

I am having a hard time putting this question into words, so I apologize. Here's the situation.

I have a table of user's Foursquare Checkins. Each checkin has a foreign key to a location. I'd like to say "Show me all user checkins, sorted by how many times they checked into each location, with the checkin count as part of the query count" I also dont want the location repeated in the list.

So imagine this is the user checkin list:

A
A
B
A
A
B
B
C

I'd want the return to be

A (4)
B (3)
C (1)

Is this something I should do with the query, or just query them all and do this in Python afterwards?

Brenden

Upvotes: 1

Views: 548

Answers (1)

lprsd
lprsd

Reputation: 87215

You just annotate the Checkin model and order it in reverse

from django.db.models import Count
Checkins.objects.filter(user=my_user).annotate(chkn_count=Count('location')).order_by('-chkn_count')

Upvotes: 1

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