1 files changed, 29 insertions, 1 deletions
diff --git a/vendor/illuminate/database/Eloquent/Relations/BelongsToMany.php b/vendor/illuminate/database/Eloquent/Relations/BelongsToMany.php
index d502897510..2eebe42113 100755
--- a/vendor/illuminate/database/Eloquent/Relations/BelongsToMany.php
+++ b/vendor/illuminate/database/Eloquent/Relations/BelongsToMany.php
@@ -559,7 +559,9 @@ class BelongsToMany extends Relation
      */
     public function getResults()
     {
-        return $this->get();
+        return ! is_null($this->parent->{$this->parentKey})
+                ? $this->get()
+                : $this->related->newCollection();
     }
 
     /**
@@ -679,6 +681,32 @@ class BelongsToMany extends Relation
     }
 
     /**
+     * Chunk the results of a query by comparing numeric IDs.
+     *
+     * @param  int  $count
+     * @param  callable  $callback
+     * @param  string|null  $column
+     * @param  string|null  $alias
+     * @return bool
+     */
+    public function chunkById($count, callable $callback, $column = null, $alias = null)
+    {
+        $this->query->addSelect($this->shouldSelect());
+
+        $column = $column ?? $this->getRelated()->qualifyColumn(
+            $this->getRelatedKeyName()
+        );
+
+        $alias = $alias ?? $this->getRelatedKeyName();
+
+        return $this->query->chunkById($count, function ($results) use ($callback) {
+            $this->hydratePivotRelation($results->all());
+
+            return $callback($results);
+        }, $column, $alias);
+    }
+
+    /**
      * Execute a callback over each item while chunking.
      *
      * @param  callable  $callback