通过laravel中的关系使用两个外键进行播种

Question

我有表用户，帖子和评论，一个用户有很多帖子，每个帖子有很多评论（post_id在评论表中），还有一个用户有很多评论，但不完全需要匿名用户（user_id在评论表中），下面的代码为每个帖子播种一些评论，但user_id从不由评论的所有者填写。我希望评论有相关的user_id注入数组外面$factory-

**CommentFactory.php**   

$factory->define(App\Contact::class, function (Faker $faker) {
return [
        // 'user_id' => $faker->randomElement([null, rand(0, 9)]), 
        'name' => $faker->name,
        'email' => $faker->unique()->safeEmail,
        'contact' => $faker->phoneNumber,
        'website' => $faker->domainName,
        'subject' => $faker->sentence(),
        'message' => $faker->paragraph(5),
    ];
});

**UserSeeder.php**

factory(App\User::class, 10)->create()->each(function ($user) {
   $user->posts()->saveMany(factory(App\Post::class, rand(2, 10))->make());
   $user->posts->each(function ($post) use ($user) {    
      // how to inject user_id value from here (comment factory)
      $post->comments()->saveMany(factory(App\Comment::class, rand(2, 10))->make());
   });
});




Answer 1

可以将属性/值数组传递到make方法：

factory(App\Comment::class, rand(2, 10))->make(['user_id'=>$user->id]);

编辑：只需迭代注释并分配一个随机用户id：

factory(App\Comment::class, rand(2, 10))->create()->each(function($comment){
   $comment->update(['user_id'=>\App\User::all()->random()->id]);
}); 

如果您希望有随机匿名评论者：

factory(App\Comment::class, rand(2, 10))->create()->each(function($comment){
   // pick either a random user_id or null;
   $userId=array_random(\App\User::all()->random()->id, null);
   $comment->update(['user_id'=>$userId]);
});