From b1299d1846dce6a914927e6d3172d0f34c980e00 Mon Sep 17 00:00:00 2001
From: Taylor Otwell <taylorotwell@gmail.com>
Date: Mon, 29 Aug 2016 08:36:46 -0500
Subject: [PATCH] revert broken pr

---
 src/Illuminate/Database/Eloquent/Builder.php | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/src/Illuminate/Database/Eloquent/Builder.php b/src/Illuminate/Database/Eloquent/Builder.php
index 586ced5db12a..a18c35d5ff2f 100755
--- a/src/Illuminate/Database/Eloquent/Builder.php
+++ b/src/Illuminate/Database/Eloquent/Builder.php
@@ -388,18 +388,13 @@ public function chunk($count, callable $callback)
      *
      * @param  int  $count
      * @param  callable  $callback
-     * @param  string  $column
      * @param  string  $alias
      * @return bool
      */
-    public function chunkById($count, callable $callback, $column = null, $alias = null)
+    public function chunkById($count, callable $callback, $column = 'id')
     {
         $lastId = null;
 
-        $column = is_null($column) ? $this->getModel()->getKeyName() : null;
-
-        $alias = is_null($alias) ? $column : $alias;
-
         $results = $this->forPageAfterId($count, 0, $column)->get();
 
         while (! $results->isEmpty()) {
@@ -407,7 +402,7 @@ public function chunkById($count, callable $callback, $column = null, $alias = n
                 return false;
             }
 
-            $lastId = $results->last()->{$alias};
+            $lastId = $results->last()->{$column};
 
             $results = $this->forPageAfterId($count, $lastId, $column)->get();
         }