title: Trying to access current user in rails admin
body: <p>Is there a way to get access to the current_user in rails admin config.model filterable option. I have tried using: </p>
  
  <pre><code>bindings[:view]._current_user
  </code></pre>
  
  <p>but bindings is nil for me</p>
  
  <p>Here's a code snippet of what I've been doing:</p>
  
  <pre><code>field :user do
    filterable do                     #I want to access current user here
      bindings[:view]._current_user   #bindings is nil
    end
  
    pretty_value do
      bindings[:view]._current_user   #bindings is not nil
    end
  end
  </code></pre>