python - Get number of occurrences of certain attribute in a related table in an aggregation in django -

i'm creating extensible analytics app django, idea have table events wish track , table connects events, date , user.

here main model:

class events_tracked(models.model):     data_point = models.foreignkey('data_points', related_name='data_point')     event_date = models.datetimefield(default=datetime.datetime.now())     user = models.foreignkey('users', related_name= 'user_tracked') 

my problem create django query can group events tracked month, , return number of tracked events (rows) data_point__id id specify.

preety sure do:

events_tracked.objects.values('event_date__month').annotate(count('data_point')).filter(data_point__id=1) 

but limited count of single data point, need query can return count row each of data points want track.

edit: important query need build each month, number of users had events tracked, data_point id in list of id's.