diff options
| -rw-r--r-- | railties/lib/rails/generators/rails/migration/USAGE | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/railties/lib/rails/generators/rails/migration/USAGE b/railties/lib/rails/generators/rails/migration/USAGE index f340ed97f2..baf3d9894f 100644 --- a/railties/lib/rails/generators/rails/migration/USAGE +++ b/railties/lib/rails/generators/rails/migration/USAGE @@ -20,3 +20,16 @@ Example: add_column :posts, :title, :string add_column :posts, :body, :text 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 |