Simulating a foreign key constraint inActiveRecord script download - Simulating a foreign key constraint inActiveRecord Simulating a foreign key constraint in

Simulating a foreign key constraint in ActiveRecord - Say for example we have products and a business rule that every product must have a category. Say for example we have products and a business rule that every product must have a category.Before ActiveRecord we would have done this with a NOT NULL foreign key constraint at the database level.

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