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diff --git a/guides/source/migrations.md b/guides/source/migrations.md index f2aa72492f..1ce132e02d 100644 --- a/guides/source/migrations.md +++ b/guides/source/migrations.md @@ -202,6 +202,25 @@ end This migration will create a `user_id` column and appropriate index. +There is also a generator which will produce join tables if `JoinTable` is part of the name: + +```bash +rails g migration CreateJoinTableCustomerProduct customer product +``` + +will produce the following migration: + +```ruby +class CreateJoinTableCustomerProduct < ActiveRecord::Migration + def change + create_join_table :customers, :products do |t| + # t.index [:customer_id, :product_id] + # t.index [:product_id, :customer_id] + end + end +end +``` + ### Model Generators The model and scaffold generators will create migrations appropriate for adding |