Hello,

I have a database function that returns the necessary data for constructing 
a bunch of related objects in one go. One of the objects has a OneToOne 
relationship with my main model instance, and it doesn't exists for every 
object of the main model. Since the main model has a reverse relationship 
with that class, I am looking for a good way to emulate the select_related 
behaviour for it. My problem is that, even if I set the relationships in the 
instances that have it, the rest will not be set, and Django will hit the 
database, trying to figure out if such relationships exist (I already know 
they don't). So I am looking for the method which 'select_related' uses to 
tell Django that certain objects don't have reverse relationships.

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