Rails Custom Foreign Key Migration

Tutorial on Ruby on Rails 3 Model including DB migration, rollback, custom. The foreign key constraint however is not created and needed to be added.

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HoboFields – Migration Generator – Normally you would run the migration generator as a regular Rails generator. If you specify a custom foreign key, the migration generator observes that:

Nov 26, 2007. As far as I know, Rails doesn't use foreign key declarations in your database tables, and therefore has no way of creating and deleting foreign.

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Ruby on Rails is an open source full-stack web application framework written in Ruby. It follows the popular MVC framework model and is known for its "convention over.

Jun 8, 2015. Rails 4.2 shipped with foreign key support. You can create migrations that delegate the responsibility directly to the database if your database.

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Introduction. A relationship, in the context of databases, is a situation that exists between two relational database tables when one table has a foreign key that.

Oct 12, 2010. Rails uses auto-incrementing integers as primary keys by default, but. class MigrateUrlAssociationsToMd5 < ActiveRecord::Migration def self.up. :custom def klass_with_custom return String if type == :varbinary return.