update

app/Http/Controllers/Admin/CourseController.php

@@ -136,6 +136,10 @@ class CourseController extends BaseController
                             }
                             $query->whereBetween($key, [$from, $to]);
                         }
+                        if ($op == 'in') {
+                            $array = explode(',', $value);
+                            $query->whereIn($key, $array);
+                        }
                     }
                 }
             });