Django select related in raw request

Question

How to make \"manual\" select_related imitation to avoid undesirable DB hits?

we have:

class Country:
    name = CharField()
class City:
    country          


        

Answer 1

I'm not sure if you can do this. As an alternative, you can select individual fields from the country table and access them on each instance.

cities = City.objects.raw("select city.*, name as country_name from city inner join country on city.country_id = country.id where name = 'london'")

city = cities[0]
# this will not hit the database again
city.country_name