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Editorial Team
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Asked: 2026-05-17T16:48:53+00:00

I’m trying to write my first rails 3 gem – everything works well, except

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I’m trying to write my first rails 3 gem – everything works well, except for routes – I can’t seem to get them working. It’s possible this is a very simple error – as mentioned, it’s my first experience with engines. The gem itself is very, very basic – literally just one scaffold

My gem’s config/routes file:

class ActionController::Routing::RouteSet
  resources :frogs
end

…And when I try to start the server, I get the following error:

/home/john/.rvm/gems/ruby-1.9.2-p0/gems/cancandevise-0.1.0/config/routes.rb:3:in
<class:RouteSet>': undefined method
resources’ for
ActionDispatch::Routing::RouteSet:Class
(NoMethodError)

Any suggestions much appreciated. At the present moment, the gem is nothing more than a very basic rails-generated ‘frog’ scaffold

Cheers,
– JB

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1 Answer

  1. Editorial Team

    @marcgg, I believe that’s the syntax for a regular rails app, but I think he’s talking about an engine.

    @unclaimedbaggage, your engine/gem routes file should look like this:

    Rails.application.routes.draw do |map|
  resources :frogs
end

    I made an example engine that touches on all the common setup issues I encountered when creating my first gem, you might find it helpful to reference:

    http://keithschacht.com/creating-a-rails-3-engine-plugin-gem/

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