使用 php artisan migrate refresh 时，laravel 5.8“调用未定义的方法 car:SetContainer()”

Question

我正在玩 laravel，正在尝试制作一个名为汽车的模型，一个名为汽车的工厂，并用 3 种不同的汽车制造随机播种。我已经到了尝试为表播种的地步，但我不断收到 SetContainer() 错误

    Seeding: car

   Symfony\Component\Debug\Exception\FatalThrowableError  : Call to undefined method car::setContainer()

  at /home/bob/myproject/vendor/laravel/framework/src/Illuminate/Database/Seeder.php:70
    66|     {
    67|         if (isset($this->container)) {
    68|             $instance = $this->container->make($class);
    69| 
  > 70|             $instance->setContainer($this->container);
    71|         } else {
    72|             $instance = new $class;
    73|         }
    74| 

  Exception trace:

  1   Illuminate\Database\Seeder::resolve("car")
       /home/bob/myproject/vendor/laravel/framework/src/Illuminate/Database/Seeder.php:42

  2   Illuminate\Database\Seeder::call("car")
      /home/bob/myproject/database/seeds/DatabaseSeeder.php:15

  Please use the argument -v to see more details.

我会在下面给你我的文件

这里是：DatabaseSeeder.php

<?php

use Illuminate\Database\Seeder;

class DatabaseSeeder extends Seeder
{
    /**
     * Seed the application's database.
     *
     * @return void
     */
    public function run()
    {
        $this->call(UsersTableSeeder::class);
        $this->call(car::class);
    }
}

这里是：app/car.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class car extends Model
{
    protected $fillable = ['make','model','year'];
}

这里是：factories/car.php

<?php

/* @var $factory \Illuminate\Database\Eloquent\Factory */

use App\car;
use Faker\Generator as Faker;

$factory->define(App\car::class, function (Faker $faker) {
    return [
        'make' => $faker->randomElement(['ford', 'honda','toyota']),
    ];
});

这里是：seeds/car.php

<?php

use Illuminate\Database\Seeder;

class car extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        factory(App\car::class, 50)->create()->each(function ($car) {
            $car->car()->save(factory(App\car::class)->make());
        });
    }
}

这里是迁移/2019_07_27_car.php

<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class car extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('car', function (Blueprint $table) {
            $table->string('make');
            $table->string('model');
            $table->string('year');

        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('car');
    }
}

Answer 1

我认为您的问题是您使用的是 Model 而不是 Seeder，您必须像下面的代码一样替换它??

<?php

use Illuminate\Database\Seeder;

class DatabaseSeeder extends Seeder
{
    /**
     * Seed the application's database.
     *
     * @return void
     */
    public function run()
    {
        $this->call(UsersTableSeeder::class);
        $this->call(CarSeeder::class);
    }
}

Answer 2

我的错误是使用 Model 而不是 Seeder

删除这个：

    $this->call([
        PackageAnswer::class,
    ]);

并使用它：

    $this->call([
        PackageAnswerSeeder::class,
    ]);

Answer 3

我在您的代码中看到了一些错误，请对您的文件应用以下修改并试一试。

步骤01：修改migrations/2019_07_27_car.php文件

您没有在 car 表中提供 model 和 year 字段的值，因此上述字段应该可以为空，因此我为这两个字段添加了 nullable() 方法。

<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class car extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('car', function (Blueprint $table) {
            $table->string('make');
            $table->string('model')->nullable();
            $table->string('year')->nullable();

        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('car');
    }
}

STEP 02 修改app/car.php file

您没有提供$table->timestamps() 用于汽车迁移文件，您应该将 public $timestamps = false 字段添加到您的汽车型号。

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class car extends Model
{
    protected $fillable = ['make','model','year'];
    public $timestamps = false;
}

STEP 03 修改factories/car.php

我觉得你只是想为汽车表创建 50 个条目，因此汽车播种器文件可以像下面这样简单地运行工厂类。

<?php

use Illuminate\Database\Seeder;

class car extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
         factory(App\car::class, 50)->create();
    }
}

STEP 04 运行 artisan 命令

以上修改后运行 artisan 命令。 $ php artisan migrate:fresh --seed