Rails：如何使模型从父模型“继承”属性？

Question

I have a model "Thing" and a model "Category", which have_many of each other through another model "ThingCategories". I want each Category to have a certain set of attributes, and when a Thing is created belonging to that Category, I want the Thing to gain those attributes. For example, if there's a Category called "film" with the attribute :director, and one called "book" with the attribute :author, and I create a Thing called "Harry Potter" which belongs to both categories, then Harry Potter should have both a :director and :author attribute. All I want is both attributes listed on the completed things/show view.

So far I've created an "Attribute" model and two connecting models "ThingAttribute" and "CategoryAttribute", but I'm not sure where to go from here. Am I on the right track?

I'm using rails 4.0.10.

Answer 1

How I'd do this..

I'd create the attributes as parts of a module. So I have a book_helper.rb and movie_helper.rb

I'd then import the correct file during the initialise function. It would be object specific.. When doing this I'd consider name-spacing the methods so you don't get a clash.

I'm not sure if this is the right way, but it would be how I'd go about it (unless someone told me a better way)