Foreign Key Migrations in Rails 2.0

January 15, 2008

 
No Gravatar

Before Rails 2.0, adding a foreign key column to your migration was easy:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

class CreateOfferGroupListings < ActiveRecord::Migration
  def self.up
    create_table :offer_group_listings do |t|
	  t.integer :offer_id
	  t.integer :offer_group_id
      t.integer :weight, :default => 0
      t.timestamps
    end
  end
 
 
  def self.down
    drop_table :offer_group_listings
  end
end

With 2.0, it’s even EASIER!

1
2
3
4
5
6
7
8
9
10
11
12

class CreateOfferGroupListings < ActiveRecord::Migration
  def self.up
    create_table :offer_group_listings do |t|
      t.references :offer, :offer_group
      t.integer :weight, :default => 0
      t.timestamps
    end
  end
  def self.down
    drop_table :offer_group_listings
  end
end
blog comments powered by Disqus