From 8d826189bb2db1c177d8605eb9218daa973acb6a Mon Sep 17 00:00:00 2001
From: Taylor Otwell <taylor@laravel.com>
Date: Wed, 2 Aug 2017 16:01:25 -0500
Subject: [PATCH] check for real primary key

---
 src/Illuminate/Database/Eloquent/Relations/Pivot.php | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/Illuminate/Database/Eloquent/Relations/Pivot.php b/src/Illuminate/Database/Eloquent/Relations/Pivot.php
index 3179bdc0f958..e80aa911d567 100755
--- a/src/Illuminate/Database/Eloquent/Relations/Pivot.php
+++ b/src/Illuminate/Database/Eloquent/Relations/Pivot.php
@@ -95,6 +95,10 @@ public static function fromRawAttributes(Model $parent, $attributes, $table, $ex
      */
     protected function setKeysForSaveQuery(Builder $query)
     {
+        if (isset($this->attributes[$this->getKeyName()])) {
+            return parent::setKeysForSaveQuery($query);
+        }
+
         $query->where($this->foreignKey, $this->getAttribute($this->foreignKey));
 
         return $query->where($this->relatedKey, $this->getAttribute($this->relatedKey));
@@ -107,6 +111,10 @@ protected function setKeysForSaveQuery(Builder $query)
      */
     public function delete()
     {
+        if (isset($this->attributes[$this->getKeyName()])) {
+            return parent::delete();
+        }
+
         return $this->getDeleteQuery()->delete();
     }