From 684208b10460b49fa34354cc42f33b9b7135814f Mon Sep 17 00:00:00 2001
From: Taylor Otwell <taylorotwell@gmail.com>
Date: Thu, 28 May 2020 22:10:45 -0500
Subject: [PATCH] fix bug with update existing pivot and polymorphic many to
 many

---
 .../Database/Eloquent/Relations/MorphToMany.php     | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/Illuminate/Database/Eloquent/Relations/MorphToMany.php b/src/Illuminate/Database/Eloquent/Relations/MorphToMany.php
index 79a052af1a61..3bb7ab83b487 100644
--- a/src/Illuminate/Database/Eloquent/Relations/MorphToMany.php
+++ b/src/Illuminate/Database/Eloquent/Relations/MorphToMany.php
@@ -115,6 +115,19 @@ public function getRelationExistenceQuery(Builder $query, Builder $parentQuery,
         );
     }
 
+    /**
+     * Get the pivot models that are currently attached.
+     *
+     * @return \Illuminate\Support\Collection
+     */
+    protected function getCurrentlyAttachedPivots()
+    {
+        return parent::getCurrentlyAttachedPivots()->map(function ($record) {
+              return $record->setMorphType($this->morphType)
+                            ->setMorphClass($this->morphClass);
+        });
+    }
+
     /**
      * Create a new query builder for the pivot table.
      *