Django-polymorphic and abstract parent class? -


i have never used django-polymorphic lib in projects, have important questions experience.

1) possible set parent class abstract? in project need easy access children objects, this: 

>>> project.objects.all() >>> [ <xxxproject:    id 1, topic "department party">,  <artproject:      id 2, topic "painting tim", artist "t. turner">,  <researchproject: id 3, topic "swallow aerodynamics", supervisor "dr. winter">]

and important me avoid inner join, thinking write 1 big model possible attributes, , next design proxy models. other solution polymorphic lib, perfect if make parent class abstract. solutions better , why in opinion?

2) how expensive use polymorphic lib in practice? how perceive lib on production projects? potential bottleneck of performance?


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