title: Laravel Relationship availability after save()
body: <p>I'm building a simple timetracking App using Laravel 5 where I have two Laravel models, one called "User" and one called "Week"</p>
  
  <p>The relationships are pretty simple:<br>
  Week.php:</p>
  
  <pre><code>public function user()
  {
      return $this-&gt;belongsTo('App\User');
  }
  </code></pre>
  
  <p>User.php:</p>
  
  <pre><code>function weeks()
  {
      return $this-&gt;hasMany('App\Week');
  }
  </code></pre>
  
  <p>Now, the User.php file also has a simple helper / novelty function called "getCurrentWeek()" that, as the name suggests, returns the current week</p>
  
  <pre><code>function getCurrentWeek()
  {
      $possibleWeek = $this-&gt;weeks-&gt;sortByDesc('starts')-&gt;all();
      if(count($possibleWeek) != 0)
      {
          return $possibleWeek[0];
      }
      else
      {
          return null;
      }
  }
  </code></pre>
  
  <p>My problem is: If I create the very first week for a user and attach / relate it to the user like so:</p>
  
  <pre><code>$week = new Week;
  
  //Omitted: Setting so attributes here ...
  
  $week-&gt;user_id = $user-&gt;id;
  $weeks-&gt;save()
  $user-&gt;weeks()-&gt;save($week);
  </code></pre>
  
  <p>And then call the <code>$user-&gt;getCurrentWeek();</code> method, that method returns <code>null</code>, although a new week has been created, is related to the user and has been saved to the database. In my mind, the expected behaviour would be for <code>getCurrentWeek()</code> to return the newly created week.<br>
  What am I misunderstanding about Eloquent here / doing just plain wrong?</p>