Laravel - 按特定标准从数据库获取用户数据

Question

我有一个用户表，用于存储我的用户和应用程序表的名称，用于存储用户生成的所有应用程序...用户进行传输应用程序，应用程序打印在管理员页面上，以便管理员可以知道哪个用户提出了申请。

如何检索应用用户的名称？如何让所有申请面包车的用户？

一位用户有很多管理员，如下所示：

用户模型：

public function admin(){
  return $this->hasMany('Martin\Models\admin');
}

管理模型：

public function application()
{
    return hasMany('Martin\Models\Application');
}

应用程序表架构：

Schema::create('applications', function (Blueprint $table)
{
    $table->increments('id');
    $table->string('user_id')->nullable();
    $table->string('destination');
    $table->date('departure_date');
    $table->integer('Number_of_days_hired');
    $table->timestamp('departure_time')->nullable();
    $table->boolean('approved')->default(0);
    $table->timestamps();
});

Answer 1

$applications = Application::all();  //get all applications. Application is your Eloquent model of the Applications table

$userIds = $applications->pluck('user_id'); // get ids from all the users that applied

$names = User::whereIn($userIds)->pluck('name'); // name is equal to the name of the column in database which stores name of the User (you didn't specify that in your question)

foreach($names as $name) {
    // do something with name
}

<强>更新

有两种方法可以找到申请特定内容的用户：

<强> 1。刀片文件：

@foreach($users as $user)
    @if($user->applied_for_van) // put your criteria for van application here
        <td>{{$user->name}}</td>
    @endif
@endforeach

2.1获取所有用户的文件：

$users_who_applied_for_van = [];

foreach($users as $user) {
    if($user->applied_for_van) {
        $users_who_applied_for_van[] = $user; // this equal to array_push. add user to the array basically
    }
}

2.2刀片文件：

    @foreach($users_who_applied_for_van as $user)
        <td>{{$user->name}}</td>
    @endforeach