笛卡尔积

app/Modules/Admin/Services/SpecService.php

@@ -96,7 +96,7 @@ class SpecService extends BaseService
      */
     public function cartesian(array $specIdArr)
     {
-        $specS = Spec::whereIn("id", $specIdArr)->get();
+        $specS = Spec::with("attrs")->whereIn("id", $specIdArr)->get();
 
         $attrS = collect();
         $cartesianProduct = new CartesianProduct();