Question

我想显示回答调查的前10位用户

我尝试过

public function topuser()
{
    $bestuser = Answer::whereRaw('id = (select max(count(`id`)) from Answer)')->get();

    return view('dashboard.top')->with('bestuser', $bestuser);
}

但这给我一个错误。

答案模型：

class Answer extends Model
{
    protected $fillable = ['answer'];
    protected $table = 'answer';

    public function survey() {
      return $this->belongsTo(Survey::class);
    }

    public function question() {
      return $this->belongsTo(Question::class);
    }
}

回答迁移文件：

public function up()
{
    Schema::create('Answer', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id');
        $table->integer('question_id');
        $table->integer('survey_id');
        $table->string('answer');
        $table->timestamps();
    });
}

请问如何解决？

Answer 1

如果您正在寻找高级用户（帖子数量最多的用户），从 User 模型角度来看可能会更容易。因此，从 User 模型上的 Answer 关系中提取计数，如下所示：

$bestuser = User::withCount('answers as answer_count')
                 ->orderBy('answer_count', 'desc')
                 ->take(10)
                 ->get();

或者，如果您只想要一个简单的列表：

$bestuser = User::withCount('answers as answer_count')
                 ->orderBy('answer_count', 'desc')
                 ->take(10)
                 ->pluck('answer_count', 'name');

Answer 2

你可以这样做

public function topuser()
{
    $bestuser = Answer::OrderBy('created_at', 'DESC')->take(10)->get();

    return view('dashboard.top')->with('bestuser', $bestuser);
}

Laravel：从答案的调查表中获取前10名用户

2 个答案: