Ruby on Rails，如何为另一个类设置一组唯一的属性

Question

sorry for the unintelligible title but I didn't know how to explain the problem :D My project consists in building a rail transport site, so I have to write some routes, stops, trains and so on.. I want to know how I can click on the route and see just its own stops. Now I can see only all stops in general. I know I'm very confusing, but I hope you can help..thanks

Answer 1

You have two models Route and Stop , you need to define associations between these classes to solve your problem

class Route < ActiveRecord::Base
  has_many :stops
end

class Stop < ActiveRecord::Base
  belongs_to :route
end

So stops table will have a route_id column, to fetch all the stops that belong to a route, you can do this

route = Route.where(id: params[:route_id]).first
stops = route.stops

Hope this helps!