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I have a parent object, Post, which has the following children.
has_one :link
has_one :picture
has_one :code
These children are mutually exclusive.
Is there a way to use polymorphic associations in reverse so that I don’t have to have link_id, picture_id, and code_id fields in my Post table?
I wrote up a small Gist showing how to do this:
https://gist.github.com/1242485