Php 如何根据id获取类别名称？

我需要正确分配一些类别和主题的名称。如何根据id获取名称

我有

career\u solutions

表，表中有

topic\u category\u id

（这是career solutions的category id）。我需要从表

categories

中的

id

/

category

列中获取类别名称

现在，我只从

career\u solutions

和

{{{$user->topic\u category\u id}

这是我的控制器：

 $user = CareerSolution::where ( 'subject', 'LIKE', '%' . $q . '%' )
        ->join('role_users' , 'role_users.user_id', '=', 'career_solutions.user_id')
        ->join('roles' , 'roles.id', '=', 'role_users.role_id')
        ->join('users', 'users.id', '=', 'career_solutions.user_id')
        ->orWhere ( 'career_solutions.user_id', 'LIKE', '%' . $q . '%' )
        ->orWhere ( 'career_solutions.id', '=', 'events.subject')
        ->orWhere('career_solutions.topic_category_id' ,'=', $category->id)
        ->orWhere ( 'career_solutions.user_id', '=', 'users.username')
        ->select('career_solutions.id as id','subject','users.id as user_id','username', 'profile_picture', 'role_id', 'optional', 'topic_category_id')
         ->get ();

---

也连接category表并从该表中获取categoryname

$user = CareerSolution::where ( 'subject', 'LIKE', '%' . $q . '%' )
        ->join('role_users' , 'role_users.user_id', '=', 'career_solutions.user_id')
        ->join('roles' , 'roles.id', '=', 'role_users.role_id')
        ->join('users', 'users.id', '=', 'career_solutions.user_id')
        ->join('categories', 'categories.id', '=', 'career_solutions.topic_category_id')
        ->orWhere ( 'career_solutions.user_id', 'LIKE', '%' . $q . '%' )
        ->orWhere ( 'career_solutions.id', '=', 'events.subject')
        ->orWhere('career_solutions.topic_category_id' ,'=', $category->id)
        ->orWhere ( 'career_solutions.user_id', '=', 'users.username')
        ->select('career_solutions.id as id','subject','users.id as user_id','username', 'profile_picture', 'role_id', 'optional', 'topic_category_id','categories.name')
         ->get ();

并调用

{{$user->name}