如何将自定义DisplayTemplate与非文本字段一起使用，以便它不会覆盖现有值？

I've been following this guide on creating custom display attributes (specifically extra html attributes) to apply to the properties in my ViewModel. I have overridden both String and Boolean in the EditorTemplates folder. The editor template checks to see if a value has been set/the display attribute has been used - and adds the additional html attributes. on creating cust