title: Active Admin - Dropdown menu with same resources
body: <p>I have a picture model and I want to know if it is possible for me to create a drop down menu where both resources are pictures with different names.</p>
  
  <p>My picture model has an attribute 'gender', which can either be male or female.</p>
  
  <p>I want to create the following structure</p>
  
  <pre><code>Picture
    -&gt;Male
    -&gt;Female
  </code></pre>
  
  <p>male.rb</p>
  
  <pre><code>ActiveAdmin.register Picture do
    menu parent: 'Pictures', :label =&gt; "Male"
  </code></pre>
  
  <p>female.rb</p>
  
  <pre><code>ActiveAdmin.register Picture do
    menu parent: 'Pictures', :label =&gt; "  female"
  </code></pre>
  
  <p>I changed the resource retrieval code also.</p>
  
  <pre><code>controller do
  def scoped_collection
    end_of_association_chain.where(gender: 'M')
  end
  end
  </code></pre>
  
  <p>This is the menu structure that I get</p>
  
  <pre><code>Picture
    -&gt;Male
  </code></pre>