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Active Record Associations — Ruby on Rails Guides
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![4. Active Record Relationships - Rails: Up and Running, 2nd Edition [Book]](https://www.oreilly.com/api/v2/epubs/9780596522001/files/httpatomoreillycomsourceoreillyimages212997.png "4. Active Record Relationships - Rails: Up and Running, 2nd Edition [Book]")
4. Active Record Relationships - Rails: Up and Running, 2nd Edition [Book]
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