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Merge pull request #8765 from mmb/join_table_usage

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Add join table migration generator to usage help. [ci skip]
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Carlos Antonio da Silva 2013-01-05 04:03:01 -08:00
commit a8637c8f28
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13
railties/lib/rails/generators/rails/migration/USAGE
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@ -20,3 +20,16 @@ Example:
add_column :posts, :title, :string add_column :posts, :title, :string
add_column :posts, :body, :text add_column :posts, :body, :text
add_column :posts, :published, :boolean add_column :posts, :published, :boolean
Migration names containing JoinTable will generate join tables for use with
has_and_belongs_to_many associations.
Example:
`rails g migration CreateMediaJoinTable artists musics:uniq`
will create the migration
create_join_table :artists, :musics do |t|
# t.index [:artist_id, :music_id]
t.index [:music_id, :artist_id], unique: true
end