From 211d88b71b3df2ae161b23579a79f8e937132388 Mon Sep 17 00:00:00 2001
From: Aleksey Magusev <lexmag@gmail.com>
Date: Wed, 11 Jul 2012 01:38:21 +0400
Subject: Add join table migration generator

For instance, running

    rails g migration CreateMediaJoinTable artists musics:uniq

will create a migration with

    create_join_table :artists, :musics do |t|
      # t.index [:artist_id, :music_id]
      t.index [:music_id, :artist_id], unique: true
    end
---
 railties/lib/rails/generators/generated_attribute.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'railties/lib/rails/generators/generated_attribute.rb')

diff --git a/railties/lib/rails/generators/generated_attribute.rb b/railties/lib/rails/generators/generated_attribute.rb
index d480fc12b5..35cd40d25e 100644
--- a/railties/lib/rails/generators/generated_attribute.rb
+++ b/railties/lib/rails/generators/generated_attribute.rb
@@ -8,6 +8,7 @@ module Rails
 
       attr_accessor :name, :type
       attr_reader   :attr_options
+      attr_writer   :index_name
 
       class << self
         def parse(column_definition)
@@ -94,7 +95,7 @@ module Rails
       end
 
       def index_name
-        if reference?
+        @index_name ||= if reference?
           polymorphic? ? %w(id type).map { |t| "#{name}_#{t}" } : "#{name}_id"
         else
           name
-- 
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