Currently, after calling values() and the query executes, the output is a 
single level dictionary, including foreign keys. I propose adding an extra 
parameter for values, or at least values_list, where if it's set to true, a 
nested dictionary will be returned when there's a foreign key.

Example:

Person model with the following fields: first_name, last_name and hometown 
(foreign key)
Hometown model with the following fields: name

A single record from Person.objects.values() will looks like this

{"id": 1
 "first_name": "first name",
 "last_name": "last name",
 "hometown__id": 1,
 "hometown__name": "town name",
}


I propose adding a nested optional parameter to values, where a single 
record from Person.objects.values(nested=True) will look like

{"id": 1
 "first_name": "first name",
 "last_name": "last name",
 "hometown": {
      "id": 1,
      "name": "town name"
  }
}


This feature is needed given that most APIs these days are nested, while 
it's simple to implement, I think it's much better to have it a built-in 
django feature.

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