Django queryset annotate field to be a list/queryset

Question

I\'m trying to use django annotation to create queryset field which is a list of values of some related model attribute.

queryset = ...
qs = queryset.annotat         


        

Answer 1

If you are using postgresql and django >= 1.9, you could use postgres specific aggregating functions e.g. ArrayAgg:

Returns a list of values, including nulls, concatenated into an array.

In case, you need to concatenate these values using a delimiter, you could also use StringAgg.