how to pass checkbox id and save it to database in laravel?

i have admin_report table to store report option created by admin and report table to store data after user report any post. admin_report_id(checkbox option) is foreign key in report table.how to store the multiple value of selected checkbox in database as foreign key?

here is the error: its not passing the id of checkbox

SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (fyp.report, CONSTRAINT report_admin_report_id_foreign FOREIGN KEY (admin_report_id) REFERENCES admin_report (id) ON DELETE CASCADE ON UPDATE CASCADE) (SQL: insert into report (report, postqs_id, admin_report_id, user_id, updated_at, created_at) values (ss, 18, 18, 5, 2018-01-12 11:34:30, 2018-01-12 11:34:30))

controller:

        public function store(Request $request,Postqs $postqs,$id,Report  $report, Admin_report $admin_report)
    {

    foreach ($report as $key => $report) {
        $data = $request->all();

       $data = $request->all();
       $user = auth()->user();
       $user->report()->create([
        'report' => $data['report'],'postqs_id' => $id,'admin_report_id'=>$id


        ]);
    }

blade:

  @foreach ($admin_report as $key => $report)
<label class="container2">

  <input type="checkbox" name="report[]"> 
  

 </select>
<span class="checkmark"></span>
 </label>
  @endforeach 

relationship :

       public function report(){
        return $this->hasMany('App\Report');
       }


    public function postqs(){
      return $this->hasMany('App\Postqs','postqs_id','id');
    }