vendor/rails/railties/lib/rails_generator/generators/components/migration/migration_generator.rb

   1 class MigrationGenerator < Rails::Generator::NamedBase
   2   def manifest
   3     record do |m|
   4       m.migration_template 'migration.rb', 'db/migrate', :assigns => get_local_assigns
   5     end
   6   end
   7
   8
   9   private
  10     def get_local_assigns
  11       returning(assigns = {}) do
  12         if class_name.underscore =~ /^(add|remove)_.*_(?:to|from)_(.*)/
  13           assigns[:migration_action] = $1
  14           assigns[:table_name]       = $2.pluralize
  15         else
  16           assigns[:attributes] = []
  17         end
  18       end
  19     end
  20 end