How to handle schemas polymorphism in Phoenix?

[kokolegorille]

Are You sure You want to use polymorphism? It looks like Single Table Inheritance,

A PetOwner can have multiples animals, animals belongs to PetOwner. Animals can be cats, dogs, whatever.

Animals would have… id, pet_owner_id, type etc.

dogs is a subset of animals, as cats…

Also, it seems to be Phoenix 1.2, new version use Schema instead of Model?

There is a post about STI it here.

Abstract model / Polymorphism?

Although I don’t get exactly, I think what you want to do is Table Inheriting. The most easiest way to go is Single Table Inheritance, where you need posts table which has all the columns VideoPost and ImagePost will have. Imitating from your example: Migration will look like create table(posts) do add :concrete_table_type, :string # , null: false <- if Post not directly used add :common_field1, :string add :common_field2, :string add :foo, :string # cannot be null: false add :bar,…