如何使用url参数访问root_path（在主机应用程序中，从Rails引擎）？

Question

Setup

engine's routes.rb :

MyEngine::Engine.routes.draw do
  get '/:guid', :to => 'foo_bar#index'
end

mounted in host app via mount MyEngine::Engine, :at => '/some_route'

Issue

Somewhere in a helper in the host app:

generated_link = my_engine.root_path(some_guid_i_got)

results in

undefined method `root_path' for #<ActionDispatch::Routing::RoutesProxy:0x00007ff443d405a0>

I tried adding include MyEngine::Engine.routes.url_helpers , but that broke a bunch of other routes that aren't even related to the engine. Engine is working other than this url-helper, but I don't want to hard-code the url in.

What's the proper way of generating the url for /some_route/a-guid-here ?

Thanks in advance

Answer 1

The error is letting you know what's wrong. undefined method root_path is letting you know that it can't find the root_path defined and that is a required path to have in your routes file.