I’m importing a (so-called) “legacy” db, and was having some issues with creating associations because the primary key wasn’t named id. To fix this, simply use set_primary_key on the class, and then use foreign_key to create associations between classes as usual.
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class LegacyDatabaseTable < ActiveRecord::Base
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set_primary_key :this_is_not_named_id
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# …
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end
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