Question

我有一个包含两个栏目，品牌和商店的数据库。每个品牌都可以欠几家商店，我想通过Fakers使用Laravel为我的数据库播种。

因此，在设置模型中的迁移和关系后

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Brand extends Model
{

    /**
     * Get the shops for the brand.
     */
    public function shops()
    {
        return $this->hasMany('App\Shop','sh_brand_id');
    }
}

和

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Shop extends Model
{
    public function user() {
        return $this->belongsTo('App\Brand','sh_brand_id');
    }
}

我想使用Factory来为数据库设定种子。

<?php

use Faker\Generator as Faker;

$factory->define(App\Shop::class, function (Faker $faker) {

    return [
        'name' => $faker->company,
        'address' => $faker->address,
    ];
});

和

use Faker\Generator as Faker;

    $factory->define(App\Brand::class, function (Faker $faker) {

        return [
            'name' => $faker->company,
            'logo_url' => $faker->imageUrl(640, 480),
            'website' => $faker->url,
            'description' => $faker->text(500),
            'telephone_number' =>'31'. $faker->randomNumber(8),
            'principal_address' => $faker->address,
            'email' => $faker->unique()->safeEmail,
        ];
    });

最后我需要使用那些工厂为数据库播种。网站上有文档和许多示例，但我发现每个解决方案都让我为每个品牌只生成一个商店，我想为每个品牌生成许多商店。

这样做的最佳方式是什么？

Answer 1

直接将其放在您的工厂中。我使用辅助方法getInstanceOf来选择另一个模型的随机实例。

use Faker\Generator as Faker;
use App\Brand;
use App\Shop;

function getInstanceOf($class, $returnIdOnly = true) {
    $instance = $class::inRandomOrder()->first() ?? factory($class)->create();
    return $returnIdOnly ? $instance->id : $instance;
}

$factory->define(Shop::class, function (Faker $faker) {
   return [
       'name' => $faker->company,
       'address' => $faker->address,
       'sh_brand_id' => getInstanceOf(Brand::class)
   ];
});

然后在播种时

factory(App\Brand::class, 10);
factory(App\Shop::class, 50);

Answer 2

我发现这个解决方法对我有用：

<?php

use Illuminate\Database\Seeder;

class DatabaseSeeder extends Seeder {

    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run() {
        factory(App\Brand::class, 50)->create() 
                ->each( 
                    function ($br) {
                        factory(App\Shop::class, 10)->create()
                                ->each(
                                    function($sh) use (&$br) { 
                                        $br->shops()->save($sh)->make();
                                    }
                                );
                    }
                );

    }
}

如何用Faker在Laravel中建立多种关系

2 个答案: