Question

我创建了一个StudentTableSeeder来为学生表添加种子，同时为每个学生播种时，我想生成一个学生的图书馆和费用证明，无论何时由StudentTableSeeder创建一个学生。我收到此错误“ FatalThrowableError：函数LibraryClearanceTableSeeder :: run（）的参数太少，传递了0个且恰好期望有1个”

这是StudentTableSeeder代码

use App\Models\Student;
use Illuminate\Database\Seeder;


class StudentsTableSeeder extends Seeder
{

     protected $students = [
        [
            'id'                    =>  1,
            'firstname'             =>  'Emmanuel',
            'middlename'            =>  'kwame',
            'lastname'              =>  'Agyapong',
            'index_no'              =>  'ANU16280111',
            'nationality'           =>  0,
            'regular_or_weekend'    =>  1,
            'image'                 =>  null,
            'course_id'             =>  1,
        ],
  ];


   public function run()
{
     foreach ($this->students as $index => $student)
      {
        $result = Student::create($student);
        if (!$result) {
            $this->command->info("Insert failed at record $index.");
            return;
        }
        $this->call(LibraryClearanceTableSeeder::class)->run($students['student_id']);
    }
    $this->command->info('Inserted '.count($this->students). ' records');
   }
 }

这是我的LibraryClearanceTableSeeder

use App\Models\Library;
use Illuminate\Database\Seeder;
use Illuminate\Support\Facades\DB;

class LibraryClearanceTableSeeder extends Seeder
 {

  public function run($studentid)
  {
    DB::table('libraries')->create([
        'student_id' => $studentid,
        'borrowed'  => 0,
    ]);
  }
}

Answer 1

在播种器中使用静态功能

这是StudentTableSeeder代码

use App\Models\Student;
use Illuminate\Database\Seeder;


class StudentsTableSeeder extends Seeder
{

     protected $students = [
        [
            'id'                    =>  1,
            'firstname'             =>  'Emmanuel',
            'middlename'            =>  'kwame',
            'lastname'              =>  'Agyapong',
            'index_no'              =>  'ANU16280111',
            'nationality'           =>  0,
            'regular_or_weekend'    =>  1,
            'image'                 =>  null,
            'course_id'             =>  1,
        ],
  ];


   public function run()
{
     foreach ($this->students as $index => $student)
      {
        $result = Student::create($student);
        if (!$result) {
            $this->command->info("Insert failed at record $index.");
            return;
        }
        LibraryClearanceTableSeeder::setLib($student['id']);
    }
    $this->command->info('Inserted '.count($this->students). ' records');
   }
 }

这是LibraryClearanceTableSeeder

use App\Models\Library;
use Illuminate\Database\Seeder;
use Illuminate\Support\Facades\DB;

class LibraryClearanceTableSeeder extends Seeder
 {

  public function run()
  {

  }

  public static function setLib($studentid)
  {
    DB::table('libraries')->create([
        'student_id' => $studentid,
        'borrowed'  => 0,
    ]);
  }
}

Answer 2

我正在获取badmethodcallexception，所以我在LibraryClearanceTableSeeder中将create（）更改为insert（），并且有效。

 public static function setLib($studentid)
 {
   DB::table('libraries')->insert([
    'student_id' => $studentid,
    'borrowed'  => 0,
  ]);
}

函数LibraryClearanceTableSeeder的参数太少

2 个答案: