title: Undefined property: Illuminate\Database\Eloquent\Relations\MorphMany::$title
body: <p>Sorry for bad English at first ) 
  I'm new to laravel5 and trying to use polymorphic relations </p>
  
  <p>here is the code </p>
  
  <pre><code>class Post extends Model
  {
  
  
      public function seo()
      {
          return $this-&gt;MorphMany('App\Seo' , 'seoable');
      }
  
  }
  
  
  class Seo extends Model
  {
      public function seoble()
      {
          return $this-&gt;morphTo();
      }
  }
  </code></pre>
  
  <p>and in the view I try to retrieve post seo data like this </p>
  
  <pre><code>$post-&gt;seo()-&gt;title;
  </code></pre>
  
  <p>here is my DB</p>
  
  <pre><code>Schema::create('seos', function (Blueprint $table) {
          $table-&gt;increments('id');
          $table-&gt;string('title');
          $table-&gt;text('keywords');
          $table-&gt;text('description');
          $table-&gt;string('og_type');
          $table-&gt;string('og_title');
          $table-&gt;text('og_description');
          $table-&gt;integer('seoable_id');
          $table-&gt;string('seoable_type');
          $table-&gt;timestamps();
      });
  </code></pre>
  
  <p>but I got the error</p>
  
  <pre><code>Undefined property: 
  Illuminate\Database\Eloquent\Relations\MorphMany::$title (View: /Applications/MAMP/htdocs/lblog/resources/views/posts/form.blade.php)
  </code></pre>