Laravel, Call to undefined function Database\Seeders\factory()

问题

I get the title error when I run command:

php artisan db:seed

My screenshot:

I have no idea where this problem comes from. I was searching for code examples and solution but I haven't found anything :(

ArticlesTableSeeder.php

<?php

namespace Database\Seeders;

use Illuminate\Database\Seeder;
// use Laracasts\TestDummy\Factory as TestDummy;

class ArticlesTableSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        factory(App\Models\Article::class, 30)->create();
    }
}

ArticleFactory.php

<?php

namespace Database\Factories;

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

class ModelFactory extends Factory
{
    /**
     * The name of the factory's corresponding model.
     *
     * @var string
     */
    protected $model = App\Models\Article::class;

    /**
     * Define the model's default state.
     *
     * @return array
     */
    public function definition()
    {
        return [
            'title' => $faker->text(50),
            'body' => $faker->text(200)
        ];
    }
}

DatabaseSeeder.php

<?php

namespace Database\Seeders;

use Illuminate\Database\Seeder;

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

Thank you in advance for your help!

回答1:

In laravel 8 the default route namespace was removed.

Try to change:

ArticlesTableSeeder.php:

 factory(App\Models\Article::class, 30)->create();

to:

\App\Models\Article::factory()->count(30)->create(); 

ArticleFactory.php:

protected $model = App\Models\Article::class;

to:

protected $model = \App\Models\Article::class;

and you will probably have to change:

 'title' => $faker->text(50),
            'body' => $faker->text(200)

to:

 'title' => $this->faker->text(50),
        'body' => $this->faker->text(200)

回答2:

Try to change

factory(App\Models\Article::class, 30)->create();

to

App\Models\Article::factory()->count(30)->create();

回答3:

If you are using version 8 of laravel, look at the upgrade guide. "Laravel's model factories feature has been totally rewritten to support classes and is not compatible with Laravel 7.x style factories. However, to ease the upgrade process, a new laravel/legacy-factories package has been created to continue using your existing factories with Laravel 8.x. You may install this package via Composer:

composer require laravel/legacy-factories"

https://laravel.com/docs/8.x/upgrade#seeder-factory-namespaces

回答4:

ArticlesTableSeeder.php

<?php

namespace Database\Seeders;

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

class ArticlesTableSeeder extends Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        Article::factory()->times(30)->create();
    }
}

ArticleFactory.php

<?php

namespace Database\Factories;

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

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

    /**
     * Define the model's default state.
     *
     * @return array
     */
    public function definition()
    {
        return [
            'title' => $this->faker->text(50),
            'body'  => $this->faker->text(200)
        ];
    }
}

回答5:

All suggestions that were mentioned here are correct. However, you must run composer require laravel/legacy-factories in order for the code to run if you're using Laravel 8. In case you get an error that says Class 'Database\Factories\ArticleFactory' not found then make sure you have class ArticleFactory extends Factory and not ModalFactory. And make sure you're using HasFactory in the Article Model like here.

<?php

namespace App\Models;

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

class Article extends Model
{
    use HasFactory;
}

来源：https://stackoverflow.com/questions/63816395/laravel-call-to-undefined-function-database-seeders-factory