title: leftJoin method in Eloquent ORM?
body: <p>I'm beginner in Laravel and I'm using 5.5 version.</p>
  
  <p>Is there a method leftJoin in Eloquent ORM?</p>
  
  <p>I know there is one on DB facade (query builder), but if I want to use Eloquent only is there a leftJoin method?</p>
  
  <p>Let's suppose, as an example, I have a model CarBrand and another one CarModel. 
  CarBrand have a relationship type hasMany with CarModel, and CarModel belongsTo CarBrand.</p>
  
  <p>Suppose I want to find CarBrand's id's without CarModel correspondence.  </p>
  
  <p>I found on this site, several responses like this:</p>
  
  <pre><code>CarBrand::leftJoin('CarModelTableName',
      'CarBrandTableName.id','=','CarModelTableName.carBrandId')-&gt;
      whereNull('CarModelTableName.carBrandId')-&gt;first();
  </code></pre>
  
  <p>I have checked and it does function as a left join :)</p>
  
  <p>But in this case is <em>::leftJoin</em> an Eloquent method or silently it goes to DB facade?  </p>
  
  <p>I can't find any for leftJoin in Laravel 5 official docs other than DB facade.
  Any links would be appreciated.</p>
  
  <p>Hope I was clear, </p>
  
  <p>Thank you for your attention. </p>