连接查询的合并在laravel

Question

三个表我想根据department_string_id加盟项目表与部门表和用户加入表project_owner_id项目表与条件project.project_owner_id = users.aceid

desired query (working fine) 
select p.*,d.department_head_aceid from project as p inner join department as d on p.department_string_id=d.department_string_id inner join users as u on p.project_owner_id=u.aceid where u.id='4' 

用户表aceid

Laravel查询

$approver_id_roles=DB::table('project') 
     ->join('department', 'project.department_string_id', '=', 'department.department_string_id')->join('users','project.project_owner_id','=','users.aceid') 
     ->where('project.project_owner_id','=','users.aceid') 
     ->select('department.department_head_aceid')->get(); 

抓住以下错误

TokenMismatc hException在VerifyCsrfToken.php线68：

我做了什么错在这里

Answer 1

为了避免我们希望在表单中添加令牌CSRF攻击。 Laravel token

<input type="hidden" name="_token" value="{{ csrf_token() }}">