_fill_optional for OneToOneFields?

[ChillarAnand]

Currently _fill_optional fills only fields for the current model it is creating leaving empty fields in related models. Is it possible to fill those values also without leaving them empty?

[vandersonmota]

Hmm.. i see. Sorry about the delay btw.

Although i can see the value in doing it, you're the first person raising the concern. I'm willing to add this if more people thinks this is needed. cc @berinhard