未定义变量：工厂 Laravel 8 Livewire

Question

我是 Laravel/Livewire/Jetstream 的新手，我正在尝试按照此 [教程] (https://lightit.io/blog/laravel-livewire-shopping-cart-demo/) 创建一个购物车项目。我在虚拟框中使用 Laravel 8/ OS Ubuntu。当我尝试运行此命令 php artisan migrate:fresh --seed

时出现异常错误 Undefined variable: factory

错误内容

Seeding: Database\Seeders\ProductSeeder

   ErrorException 

  Undefined variable: factory

  at database/factories/ProductFactory.php:7
      3▕ /** @var \Illuminate\Database\Eloquent\Factory $factory */
      4▕ use App\Models\Product;
      5▕ use Faker\Generator as Faker;
      6▕ 
  ➜   7▕ $factory->define(Product::class, function (Faker $faker) {
      8▕     return [
      9▕         'name' => $faker->word,
     10▕         'description' => $faker->text(180),
     11▕         'price' => $faker->numberBetween(50, 100)

  1   database/factories/ProductFactory.php:7
      Illuminate\Foundation\Bootstrap\HandleExceptions::handleError()

      +2 vendor frames 
  4   [internal]:0
      Composer\Autoload\ClassLoader::loadClass()

composer.json 文件

 "autoload": {
    "psr-4": {
        "App\": "app/",
        "Database\Factories\": "database/factories/",
        "Database\Seeders\": "database/seeders/"
    }

database/migrations/xxxx_xx_xx_xxxxxx_create_products_table.php

<?php

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

class CreateProductsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('products', function (Blueprint $table) {
            $table->id();

            $table->string('name');
            $table->string('description');
            $table->float('price');
            
            $table->timestamps();
        });
    }

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

database/factories/ProductFactory.php

    <?php

/** @var \Illuminate\Database\Eloquent\Factory $factory */
use App\Models\Product;
use Faker\Generator as Faker;

$factory->define(Product::class, function (Faker $faker) {
    return [
        'name' => $faker->word,
        'description' => $faker->text(180),
        'price' => $faker->numberBetween(50, 100)
    ];
});

database/seeders/ProductSeeder.php

    <?php
namespace Database\Seeders;

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

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

database/seeders/DatabaseSeeder.php

    <?php

use Database\Seeders\ProductSeeder;
use Illuminate\Database\Seeder;


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

你能帮我理解我做错了什么吗？

谢谢

Answer 1

您的 ProductFactory::class 似乎遵循 Laravel 7 惯例。 Laravel 8 模型工厂功能已完全重写以支持类并且与 Laravel 7.x 样式工厂不兼容。

您可以执行以下操作：

<?php

namespace Database\Factories;

use App\Models\Product;
use Illuminate\Database\Eloquent\Factories\Factory;
use Illuminate\Support\Str;

class ProductFactory extends Factory
{
    /**
     * The name of the factory's corresponding model.
     *
     * @var string
     */
    protected $model = Product::class;

    /**
     * Define the model's default state.
     *
     * @return array
     */
    public function definition()
    {
        return [
            'name' => $this->faker->name,
            'description' => $this->faker->realText(180),
            'price' => $this->faker->numberBetween(50, 100)
        ];
    }
}

此外，您还需要更新 Product Model：

use Illuminate\Database\Eloquent\Factories\HasFactory;

class Product extends Model
{
    use HasFactory;

未定义变量：工厂 Laravel 8 Livewire

Undefined variable: factory Laravel 8 Livewire

php

database

virtualbox

shopping-cart

laravel-livewire