Rails Generators Actions CreateMigration class CreateMigration Ruby on Rails 4.0.13 Since v4.0.13 Last seen in v4.2.9 Available in: v4.0.13 v4.1.16 v4.2.9 Compare with: … v4.1.16 v4.2.9 No documentation comment. Inherits from Thor::Actions::CreateFile Methods (defined here) # existing_migration # exists? # identical? # migration_dir # migration_file_name # on_conflict_behavior # relative_existing_migration # revoke! # say_status