title: simple_form_for not hitting correct controller action
body: <p>I have the following path that I want my form to hit:</p>
  
  <pre><code>namespace :admin
    resources :jobs do
      member do
        patch 'update_attributes', to: 'jobs#update_attributes', as: 'update_attributes'
  </code></pre>
  
  <p>When I run rake routes this gives:</p>
  
  <pre><code>update_attributes_admin_job PATCH /admin/jobs/:id/update_attributes(.:format)          admin/jobs#update_attributes
  </code></pre>
  
  <p>And my simple form:</p>
  
  <pre><code>= simple_form_for job, url: update_attributes_admin_job_path(job) do |g|
    .panel.panel-default
      .panel-heading
        Job Summary:
        .pull-right
          = g.submit
      .panel-body
        #job_edit_contacts_component
          .clearfix
            %center
              = g.association :admin, as: :select, collection: Admin.all, label: 'Lead Admin'
            %table.table.table-striped.table-hover
              %thead
               %tr
                  %th Select
                  %th Attribute
                %tbody
                  - status_attributes.each do |attribute|
                    %tr
                      %td 
                        = check_box_tag "attributes[]", attribute, job.send(attribute)
                      %td
                        = attribute.to_s.humanize
  </code></pre>
  
  <p>When I click on submit, the server reads:</p>
  
  <pre><code>Started PATCH "/admin/jobs/5846" for ::1 at 2017-11-02 11:06:13 +0000
  Processing by Admin::JobsController#update as HTML
  </code></pre>
  
  <p>I've tried simply doing</p>
  
  <pre><code>= simple_form_for update_attributes_admin_job_path(job) do |g|
  </code></pre>
  
  <p>However this still submits to the wrong route.</p>
  
  <p>What am I doing wrong?</p>