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PORails Engines: Namespaced Polymorphic URLs
 

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    <p>I have a Rails engine, <code>MyEngine</code>, that doesn't have an isolated namespace. I'm trying to use the polymorphic helpers to generate links to resources, as per the <a href="http://apidock.com/rails/ActionDispatch/Routing/PolymorphicRoutes" rel="nofollow">docs</a>.</p> <p>An engine route:</p> <pre><code># config/routes.rb ... namespace :admin do resources :my_resource end ... </code></pre> <p>Example output of <code>rake app:routes</code> (remember, this is an Engine):</p> <pre><code> admin_my_resources GET /admin/my_resources(.:format) my_engine/admin/my_resources#index POST /admin/my_resources(.:format) my_engine/admin/my_resources#create new_admin_my_resource GET /admin/my_resources/new(.:format) my_engine/admin/my_resources#new edit_admin_my_resource GET /admin/my_resources/:id/edit(.:format) my_engine/admin/my_resources#edit admin_my_resource PUT /admin/my_resources/:id(.:format) my_engine/admin/my_resources#update DELETE /admin/my_resources/:id(.:format) my_engine/admin/my_resources#destroy </code></pre> <p>If <code>my_resource</code> is an instance of a <code>MyResource</code> model with ID <code>12345</code>, I'd expect:</p> <pre><code>polymorphic_url([my_engine, :admin, my_resource]) </code></pre> <p>to render:</p> <pre><code>/my_engine/admin/my_resource/12345 </code></pre> <p>but I was wrong. Instead, I get an exception:</p> <pre><code>undefined method `admin_my_engine_my_resource_path'... </code></pre> <p>So, <code>polymorphic_url</code> is trying to use <code>admin_my_engine_my_resource_path</code> where it really should be using something more like <code>my_engine.admin_my_resource_path(my_resource)</code></p> <p>Rails seems to be adding <code>:admin</code> the wrong way around... or am I doing it wrong?</p>
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