Question

I have a table that holds multiple tracking id’s in it. What I’m trying to do is group all tracking id’s and get a count for them.

This is what the SQL query would look like:

SELECT tracking_id, COUNT( * ) 
FROM tracking
GROUP BY tracking_id

I think I’ve found the correct method of doing this in django however I’m missing something and am currently getting the error Exception Value: 'dict' object has no attribute 'tracking_id'

Here’s what my view looks like:

def stats(request):

    users = Tracking.objects.values('tracking_id').annotate(dcount=Count('tracking_id'))

    stats = []
    for user in users:
        stats.append((user.tracking_id, user.dcount))

    return render_to_response('tracking/stats.html', { 'stats': stats, })

Any help would be appreciated!

Answer 1

How about (partially inspired by @second’s answer):

users = Tracking.objects.values( 'tracking_id' ).annotate(dcount=Count('tracking_id'))

and then

for user in users:
    stats.append((user[ 'tracking_id' ], user[ 'dcount' ]))    

?