python-3.xtype-conversiondjango-querysetdjango-annotatedjango-2.x

Get the value of name key from the list of dictionaries return by the annotate and then sort by name?


My Code

def get_areas(self, obj):
        text = []
        if obj.areas and not obj.areas == []:
            print(json.loads(obj.area_count))
            print(type(obj.area_count))
            return json.loads(obj.area_count)
        return "-"

get_areas.short_description = "Areas"
get_areas.admin_order_field= "area_count"

def get_queryset(self, request):
        from django.contrib.postgres.fields.jsonb import KeyTextTransform
        qs = super(UserAdmin, self).get_queryset(request)
        filtered_query = qs.filter(
            is_superuser=False, is_staff=False
        ).annotate(
            wishlist_count=Count('wishlist', distinct=True),
            booking_count=Count('booking', distinct=True),
            review_count=Count('review', distinct=True),
            suggestion_count=Count('suggestion', distinct=True),
            home_city=NullIf('home__city'),
            home_country=NullIf('home__country'),              
            area_count = F('areas'),

        )

What i get is a list as a str type which looks something like:

"[{'id': 98, 'name': 'Khalifa City and Masdar City', 'city': 'Abu Dhabi'},
{'id': 99, 'name': 'Masdar City', 'city': 'Abu Dhabi'}]"
<class 'str'>

What I want is the list of names instead:

['Khalifa City and Masdar City','Madsar City']

So, how to return the result by area_count = F('areas') as list instead of str

Note: The list can contain more than 1 dictionary and I want to return just the names.Any effort would be appreciated


Solution

  • What do you need an annotate by F("areas") for?

    Just remove it and access "areas" as an attr on the object in QS.