extracted method

app/models/concerns/default_values.rb

@@ -0,0 +1,8 @@
+module DefaultValues
+  def set_default_values_if_present(options = {})
+    options.each do |attribute, value|
+      send(:"#{attribute}=", send(:"#{attribute}") || value) if has_attribute?(attribute)
+    end
+  end
+  private :set_default_values_if_present
+end