title: Override Rails_Admin dropdown value
body: <p>I have two models: <code>Company</code> and <code>Salesperson</code> that look like this:</p>
  
  <pre><code>class Company &lt; ActiveRecord::Base
    belongs_to :salesperson
  end
  
  class Salesperson &lt; ActiveRecord::Base
    has_many :companies
  end
  </code></pre>
  
  <p>In Rails_Admin, when I am trying to assign a salesperson to a company (Editing a Company), the sales person dropdown is showing values like:</p>
  
  <pre><code>Salesperson #1
  Salesperson #2
  Salesperson #3
  </code></pre>
  
  <p>Instead, I'm trying to get the name to display in the dropdown:</p>
  
  <pre><code>John Doe
  Jane Smith
  Bobby Jones
  </code></pre>
  
  <p>I've tried these solutions, but they didn't work.  </p>
  
  <p><a href="https://stackoverflow.com/questions/21751845/how-to-override-value-that-appears-in-a-dropdown-in-the-rails-admin-gem">How to override value that appears in a dropdown in the rails_admin gem</a></p>
  
  <p><a href="https://stackoverflow.com/questions/26590997/rails-admin-change-belongs-to-drop-down-to-display-options-from-different-field">rails_admin Change belongs_to Drop-down to Display Options from Different Field</a> (this is the exact problem I'm dealing with!)</p>
  
  <p>Maybe it's because they're from older versions of Rails_Admin?  I'm on <code>0.8.1</code>?</p>
  
  <p>Anyone know how to do this?</p>