1 files changed, 6 insertions, 2 deletions
diff --git a/railties/lib/rails/generators/named_base.rb b/railties/lib/rails/generators/named_base.rb
index 01a8e2e9b4..243694f38e 100644
--- a/railties/lib/rails/generators/named_base.rb
+++ b/railties/lib/rails/generators/named_base.rb
@@ -18,8 +18,8 @@ module Rails
         parse_attributes! if respond_to?(:attributes)
       end
 
-      # Defines the template that would be used for the migration file.
-      # The arguments include the source template file, the migration filename etc.
+      # Overrides <tt>Thor::Actions#template</tt> so it can tell if
+      # a template is currently being created.
       no_tasks do
         def template(source, *args, &block)
           inside_template do
@@ -183,6 +183,10 @@ module Rails
           !defined?(ActiveRecord::Base) || ActiveRecord::Base.pluralize_table_names
         end
 
+        def mountable_engine?
+          defined?(ENGINE_ROOT) && namespaced?
+        end
+
         # Add a class collisions name to be checked on class initialization. You
         # can supply a hash with a :prefix or :suffix to be tested.
         #