在Laravel中通过ID获取所有用户的电子邮件

Question

我想向第二个表中具有激活选项但不确定如何激活的用户发送电子邮件。

逻辑

1. 从mailings表中获取所有用户ID
2. 检查其latest_blog列是否设置为on
3. 发送电子邮件给那些用户

代码

$latest_blog = Mailing::where('latest_blog', 'on')->pluck('user_id');
$users = User::whereIn('id', [$latest_blog])->get();
foreach($users as $user){
  Mail::to($user->email)->send(new BlogUpdates($user, $post));
}

dd($latest_blog);返回

Collection {#1705 ▼
  #items: array:5 [▼
    0 => 41
    1 => 51
    2 => 42
    3 => 60
    4 => 61
  ]
}

dd($users);仅返回1个用户，而所有用户的latest_blog列均设置为on。因此基本上应该返回5个用户，而不是1个。

Collection {#1758 ▼
  #items: array:1 [▼
    0 => User {#1756 ▶}
  ]
}

有什么主意吗？

更新

Mailing model

protected $fillable = [
  'user_id', 'interests', 'security', 'latest_projects', 'latest_blog'
];

public function user()
{
  return $this->belongsTo(User::class);
}

User model

protected $fillable = [
  'name', 'username', 'email', 'password', 'points', 'google2fa_secret'
];

public function mails()
{
  return $this->hasOne(Mailing::class);
}

Mailing Schema

Schema::create('mailings', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('user_id')->unsigned()->nullable()->unique();
            $table->string('interests')->default('on');
            $table->string('security')->default('on');
            $table->string('latest_projects')->default('on');
            $table->string('latest_blog')->default('on');
            $table->timestamps();
        });
        Schema::table('mailings', function (Blueprint $table) {
         $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
});

Answer 1

您所做的一切都是正确的，但是您在whereIn子句中添加了额外的数组。由于pluck已返回数组，因此无需在whereIn子句中再次添加[]，

您的代码应为

$latest_blog = Mailing::where('latest_blog', 'on')->pluck('user_id');
$users = User::whereIn('id', $latest_blog)->get();
foreach($users as $user){
   Mail::to($user->email)->send(new BlogUpdates($user, $post));
}

希望您能理解

Answer 2

这将起作用：

$latest_blog = Mailing::where('latest_blog', 'on')->get()->pluck('user_id');
// dd($latest_blog);
$users = User::whereIn('id', $latest_blog->toArray())->get();
foreach($users as $user){
  Mail::to($user->email)->send(new BlogUpdates($user, $post));
}