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2006 May 27
7
How should I select rows from a join-model based on more than one association?
A concrete example:
We''re building a system to organize the information about workshops
being held in various conventions. A convention has more than one
workshop, and each workshop can be held in more than one convention.
Also each workshop has a host, who is specific to a workshop being
held in a specific convention.
For example, Matz may host an "Introduction to Ruby"