def load_generic_related qs args Do in number of content types quries

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
def load_generic_related(qs, *args):
"""
Do in 1 + M(number of content types) quries the loading
of related object which linked via GenericForeignKey
"""
items = qs.select_related('content_type')
model_map = {}
item_map = {}
for item in items:
model_map.setdefault(item.content_type, {})\
.setdefault(item.object_id, []).append(item.id)
item_map[item.id] = item
for ctype, ids in model_map.items():
cobjects = ctype.model_class().objects.select_related(*args)\
.filter(id__in=ids.keys())
for obj in cobjects:
for id in ids[obj.id]:
item_map[id].content_object = obj
return items