Django ORM: Filter by extra attribute

Question

I want to filter some database objects by a concatenated string.

The normal SQL query would be:

SELECT concat(firstName, \' \', name) FROM person WHE         


        

Answer 1

It's not a bug. filter() only inspects model definitions, so it doesn't recognize fullName as a declared field (because it's not - it's an extra argument in a query).

You can add the fullName to WHERE using extra():

Person.objects.extra(where=["fullName LIKE %s"], params=["Alexei%"])