Don't you just need a field called "parent_type" (or whatever) in the "Comments" table? You'd then be able to query all the comments, all the comments associated with one of the four tables, and (in conjuction with "parent_id") all the comments associated with a specific item in one of the four tables.

In reply to Re^3: Pseudo-Polymorphism by ikegami
in thread Pseudo-Polymorphism by Spidy

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