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““Why would you do this?” you may ask. Well quite simply I am in a team building a new data management system to sit on top of a legacy system with its legacy database. All the new code is new, shiny and streamlined and the old code is… well… crap but we have to keep both systems running concurrently so we have various tables in the legacy database we need to access from the new system. As it happens we need to access the legacy users table in a ‘has_many through’ from the new ‘orders’ table.

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