django most efficient way to count same field values in a query

Question

Lets say if I have a model that has lots of fields, but I only care about a charfield. Lets say that charfield can be anything so I don\'t know the possible values, but I kn

Answer 1

You want something similar to "count ... group by". You can do this with the aggregation features of django's ORM:

from django.db.models import Count

fieldname = 'myCharField'
MyModel.objects.values(fieldname)
    .order_by(fieldname)
    .annotate(the_count=Count(fieldname))

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