我有上面提到的错误，这里是复制日志

php artisan db:seed

   BadMethodCallException

  Call to undefined method App\Models\Category::factory()

  at vendor/laravel/framework/src/Illuminate/Support/Traits/ForwardsCalls.php:50
     46▕      * @throws \BadMethodCallException
     47▕      */
     48▕     protected static function throwBadMethodCallException($method)
     49▕     {
  ➜  50▕         throw new BadMethodCallException(sprintf(
     51▕             'Call to undefined method %s::%s()',static::class,$method
     52▕         ));
     53▕     }
     54▕ }

  • Bad Method Call: Did you mean App\Models\Category::toArray() ?

      +3 vendor frames
  4   database/seeders/DatabaseSeeder.php:38
      Illuminate\Database\Eloquent\Model::__callStatic()

      +22 vendor frames
  27  artisan:37
      Illuminate\Foundation\Console\Kernel::handle()

这是databaseseeder.php 类，因为错误在那里：

<?php

namespace Database\Seeders;

use App\Models\Category;
use App\Models\Product;
use App\Models\Transaction;
use App\Models\User;
use Illuminate\Database\Seeder;

use Illuminate\Support\Facades\DB;

class DatabaseSeeder extends Seeder
{
    /**
     * Seed the application's database.
     *
     * @return void
     */
    public function run()
    {
        // \App\Models\User::factory(10)->create();

        DB::statement('SET FOREIGN_KEY_CHECKS=0');

        User::truncate();
        Category::truncate();
        Product::truncate();
        Transaction::truncate();
        DB::table('category_product')->truncate();

        $cantidadUsuarios = 200;
        $cantidadCategories = 30;
        $cantidadProductos = 1000;
        $cantidadTransacciones = 1000;

        \App\Models\User::factory()->count($cantidadUsuarios)->create();
        \App\Models\Category::factory()->count($cantidadUsuarios)->create();

        \App\Models\Product::factory()->count($cantidadTransacciones)->create()->each                                                                                           (
            function ($producto) {
                $categorias = Category::all()->random(mt_rand(1,5))->pluck('id');
                $producto->categories()->attach($categorias);
            }
        );

        \App\Models\Transaction::factory()->count($cantidadTransacciones)->create();
    }
}

有错误行：

\App\Models\Category::factory()->count($cantidadUsuarios)->create();

这里我们得到了类别类：

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Category extends Model
{
    public $table = "categories";

    protected $fillable = [
        'name','description',];
}

这里我们得到了类别工厂：

<?php

namespace Database\Factories;

use App\Models\Category;
use Illuminate\Database\Eloquent\Factories\Factory;

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

    /**
     * Define the model's default state.
     *
     * @return array
     */
    public function definition()
    {
        return [
            //
             'name' => $this->faker->word,'description' => $this->faker->paragraph(1),];
    }
}

这里是类别迁移：

<?php

use App\Models\Product;
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateCategoriesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('categories',function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->string('description',1000);
            $table->integer('quantity')->unsigned();
            $table->string('status')->default(Product::PRODUCTO_NO_DISPONIBLE);
            $table->string('image');
            $table->integer('seller_id')->unsigned();
            $table->timestamps();

            $table->foreign('seller_id')->references('id')->on('users');
        });
    }

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

我发布了您需要的所有内容，因为我是新手，我找不到问题。