2 files changed, 10 insertions, 0 deletions
diff --git a/activerecord/lib/rails/generators/active_record/model/model_generator.rb b/activerecord/lib/rails/generators/active_record/model/model_generator.rb
index 3e72fbeca8..539c2517ee 100644
--- a/activerecord/lib/rails/generators/active_record/model/model_generator.rb
+++ b/activerecord/lib/rails/generators/active_record/model/model_generator.rb
@@ -20,6 +20,11 @@ module ActiveRecord
         template 'model.rb', File.join('app/models', class_path, "#{file_name}.rb")
       end
 
+      def create_module_file
+        return if class_path.empty?
+        template 'module.rb', File.join('app/models', "#{class_path.join('/')}.rb")
+      end
+
       hook_for :test_framework
 
       protected
diff --git a/activerecord/lib/rails/generators/active_record/model/templates/module.rb b/activerecord/lib/rails/generators/active_record/model/templates/module.rb
new file mode 100644
index 0000000000..bb4220f038
--- /dev/null
+++ b/activerecord/lib/rails/generators/active_record/model/templates/module.rb
@@ -0,0 +1,5 @@
+module <%= class_path.map(&:camelize).join('::') %>
+  def self.table_name_prefix
+    '<%= class_path.join('_') %>_'
+  end
+end