Refactor

src/Components/HandlesBoundValues.php

@@ -61,9 +61,13 @@ private function findOptionsFromRelation($bind, string $name)
         $relation = $bind->{$name}();
 
         if ($relation instanceof BelongsToMany) {
+            $related = $relation->getRelated();
+
+            $relatedKeyName = $relation->getRelatedKeyName();
+
             return $relation->getBaseQuery()
-                ->get($relation->getQualifiedRelatedKeyName())
-                ->pluck($relation->getRelatedKeyName())
+                ->get($related->qualifyColumn($relatedKeyName))
+                ->pluck($relatedKeyName)
                 ->all();
         }
     }

tests/Feature/SelectRelationTest.php

@@ -36,7 +36,7 @@ public function it_shows_the_slot_if_the_options_are_empty()
 
         $post->comments()->sync([$commentA->getKey(), $commentC->getKey()]);
 
-        $options = Comment::get()->keyBy->id->map->content;
+        $options = Comment::get()->pluck('content', 'id');
 
         Route::get('select-relation', function () use ($post, $options) {
             return view('select-relation')