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-rw-r--r--railties/lib/rails/engine.rb15
1 files changed, 15 insertions, 0 deletions
diff --git a/railties/lib/rails/engine.rb b/railties/lib/rails/engine.rb
index 8387f277c9..fd91185a47 100644
--- a/railties/lib/rails/engine.rb
+++ b/railties/lib/rails/engine.rb
@@ -257,6 +257,21 @@ module Rails
#
# This code will use my_engine.user_path(@user) to generate proper route.
#
+ # == Migrations & seed data
+ #
+ # Engines can have their own migrations. Default path for migrations is exactly the same
+ # as in application: db/migrate
+ #
+ # To use engine's migrations in application you can use rake task, which copies them to
+ # application's dir:
+ #
+ # rake railties:copy_migrations
+ #
+ # If your engine has migrations, you may also want to prepare data for the database in
+ # seeds.rb file. You can load that data using load_seed method, e.g.
+ #
+ # MyEngine::Engine.load_seed
+ #
class Engine < Railtie
autoload :Configurable, "rails/engine/configurable"
autoload :Configuration, "rails/engine/configuration"