title: Laravel Nova Self-referential Relationship
body: <p>In Laravel, if I want to create a self-referential relationship I can do the following:</p>
  
  <pre><code>class Post extends Eloquent
  {
      public function parent()
      {
          return $this-&gt;belongsTo('Post', 'parent_id');
      }
  
      public function children()
      {
          return $this-&gt;hasMany('Post', 'parent_id');
      }
  }
  </code></pre>
  
  <p>How can I make a Laravel Nova resource display this connection?</p>
  
  <pre><code>public function fields(Request $request)
  {
      return [
          Text::make('Autor', 'author'),
          Select::make('Type', 'type')-&gt;options([
              'News' =&gt; 'news',
              'Update' =&gt; 'update',
          ]),
          BelongsToMany::make('Post') // does not work
      ];
  }
  </code></pre>