我有一个问题与laravel faker,我正在寻找一个教程插入成千上万的记录使用播种机
这是我的PostSeeder.php:
<?php
namespace Database\Seeders;
use Illuminate\Database\Seeder;
use App\Models\Post;
use App\Models\User;
class PostSeeder extends Seeder
{
/**
* Run the database seeds.
*
* @return void
*/
public function run()
{
Post::factory(10)->create();
}
}
这里我插入了10个帖子,但是我需要测试成千上万条记录,所以我看了一个教程并修改了种子
<?php
namespace Database\Seeders;
use Illuminate\Database\Seeder;
use App\Models\Post;
use App\Models\User;
use Illuminate\Support\Str;
class PostSeeder extends Seeder
{
/**
* Run the database seeds.
*
* @return void
*/
public function run()
{
$users= collect(User::all()->modelKeys());
$data = [];
for ($i = 0; $i < 100000; $i++) {
$data[] = [
'body' => Str::random(50),
'image' => 'https://via.placeholder.com/640x480.png/0077dd?text=inventore',
'user_id' => $users->random(),
'created_at' => now()->toDateTimeString(),
'updated_at' => now()->toDateTimeString(),
];
}
$chunks = array_chunk($data, 10000);
foreach ($chunks as $chunk) {
Post::insert($chunk);
}
}
}
使用这种方法,我可以更快地插入数千条记录,但问题是我没有正确插入body和image字段
我想尝试一些东西与faker,在我的工厂我有这个:
PostFactory.php
<?php
namespace Database\Factories;
use App\Models\Post;
use App\Models\User;
use Illuminate\Database\Eloquent\Factories\Factory;
class PostFactory extends Factory
{
/**
* The name of the factory's corresponding model.
*
* @var string
*/
protected $model = Post::class;
/**
* Define the model's default state.
*
* @return array
*/
public function definition()
{
return [
'body' => $this->faker->text,
'image' => $this->faker->imageUrl(),
'user_id' => function() {
return User::factory()->create()->id;
}
];
}
}
我想在PostSeeder中使用像这样的伪方法,但是我不能,我能做什么呢?谢谢。
编辑:
我试过这个:
public function run(Faker $faker)
{
$users= collect(User::all()->modelKeys());
$data = [];
for ($i = 0; $i < 50000; $i++) {
$data[] = [
'content' => $faker->text,
'image_path' => $faker->imageUrl(),
'user_id' => $users->random(),
'created_at' => now()->toDateTimeString(),
'updated_at' => now()->toDateTimeString(),
];
}
$chunks = array_chunk($data, 5000);
foreach ($chunks as $chunk) {
Post::insert($chunk);
}
}
我收到了这条信息:PDO异常错误::(“SQLSTATE[HY 000]:一般错误:2006 MySQL服务器已经走了”)但是当我尝试使用更少的记录时,它工作正常,所以,我这样更改了播种器:
$users= collect(User::all()->modelKeys());
$posts = Post::factory(10)->create();
$posts = collect($posts->only(['content','image_path']));
...
...
'content' => $posts->random()->content,
'image_path' => $posts->random()->image_path
...
但这不起作用,它得到了这个错误:* 您请求了1个项目,但只有0个项目可用。* 看起来 $posts-〉only(['content','image_path']) 无法正常工作。因此我尝试了以下操作:
Post::factory(10)->create();
$tweets = Tweet::select(['content','image_path'])->get();
...
'content' => $posts->random()->content,
'image_path' => $posts->random()->image_path
...
它同样适用于少数记录,但当我尝试处理数千条记录时,我再次得到这个错误:* PDO异常::(“SQLSTATE[HY 000]:一般错误:2006 MySQL服务器已关闭”)*
我能做什么?谢谢
2条答案
按热度按时间biswetbf1#
由于模型工厂创建内存中的对象,因此会占用大量内存,因此不适用于大型种子。
但是您可以使用
Faker
生成数据:4nkexdtk2#
就我个人而言,我会这样做:
通常快得多,与faker的使用无关