RESTfully Nesting Resource Routes with Single Identifiers

Question

In my Rails app I have a fairly standard has_many relationship between two entities. A Foo has zero or more Bars; a Bar belongs to exactly

Answer 1

Personally, if each Bar is dependent on a Foo, option #2 makes more sense. For example, if Foo is a blog and Bar is a post, it is far more logical to access a particular post at example.bloghosting.com/blog/1/post/2 than example.bloghosting.com/post/21.

Do do this with the latest version of Rails:

class Food < ActiveRecord::Base
    has_many :bars
end

class Bar < ActiveRecord::Base
    belongs_to :foo
end

Then, in the Rails router (/config/routes.rb):

map.resources :foos do |foo|
    foo.resource :bars
end

For more information, see Rails Routing from the Outside In and the Rails API Documentation.