formatting

Author: taylorotwell

src/Illuminate/Database/Eloquent/Collection.php

@@ -642,7 +642,15 @@ public function toQuery()
         $model = $this->first();
 
         if (! $model) {
-            throw new LogicException('can not get Eloquent QueryBuilder from an empty Collection.');
+            throw new LogicException('Unable to create query for empty collection.');
+        }
+
+        $class = get_class($model);
+
+        if ($this->filter(function ($model) use ($class) {
+            return ! $model instanceof $class;
+        })->isNotEmpty()) {
+            throw new LogicException('Unable to create query for collection with mixed types.');
         }
 
         return $model->newModelQuery()->whereKey($this->modelKeys());