laravel如何使用switch在数据表中使用查询进行多重过滤

Posted 2023-02-16

【中文标题】laravel如何使用switch在数据表中使用查询进行多重过滤

【英文标题】：laravel how to make a multiple filter using query in datatables using switch

【发布时间】：2021-11-13 15:46:36

【问题描述】：

我有 5 个过滤器，kampus，fakulti，program，semester 和 status 所以每个过滤器总是过滤状态 这意味着状态过滤器将是开关盒的选择，而另一个过滤器将是开关盒示例中的条件：

$student = Student::select("*");

    if($student)
      $today = date("Y-m-d");
      switch($request->stat)
        case 'Y':
          
          if($request->kampus != "-" && $request->fakulti != "-" && $request->program != "-" && $request->part != "-" )
            $rs = $student->where('kodkampus',$request->kampus)
            ->where('kodfakulti',$request->fakulti)
            ->where('kodprogram',$request->program)
            ->where('part',$request->semester)
            ->where('vaccine_date', '<=', $today)
            ->where('vaccine2_date', '<=', $today);

           else if ($request->kampus != "-" && $request->fakulti != "-"  && $request->program != "-" )
            
            $rs = $student
            ->where('kodkampus',$request->kampus)
            ->where('kodprogram',$request->program)
            ->where('kodfakulti',$request->fakulti)

            ->where('vaccine_date', '<=', $today)
            ->where('vaccine2_date', '<=', $today);

           else if ($request->kampus != "-" && $request->fakulti != "-")
            $rs = $student->where('kodkampus',$request->kampus)
            ->where('kodfakulti',$request->fakulti)
            ->where('vaccine_date', '<=', $today)
            ->where('vaccine2_date', '<=', $today);
            
           else if ($request->kampus != "-")
            $rs = $student->where('kodkampus',$request->kampus)
            ->where('vaccine_date', '<=', $today)
            ->where('vaccine2_date', '<=', $today);
          

          
          $rs = $rs->get();
          break;
        case 'D1':
          $rs = Student::get();
           break;
      

      return datatables()
      ->of($rs)->make(true);

    else
      abort(404,'no record');
    

所以我需要过滤器可以单独过滤而无需满足所有条件，例如，如果我只想过滤 fakulti，我可以不选择 kampus 和 program 和学期。我非常需要帮助，我需要它是单独的过滤器，但在同一个查询中

please2 帮我困了大约 3 天，我是 laravel 的新手，使用 eloquent 和数据表

【参考方案1】：

if else 不需要这样做

它是一个查询构建器，您可以在 $student 查询构建器上堆叠 wheres

if(!$student)
    return abort(404,'no record');

$today = date("Y-m-d");
if ($request->stat == 'Y')
  if($request->part != "-" )
    $student->where('part',$request->semester)
  
  if ($request->program != "-" )
    $student->where('kodprogram',$request->program)
  
  if ($request->fakulti != "-")
    $student->where('kodfakulti',$request->fakulti);
  
  if ($request->kampus != "-")
    $student->where('kodkampus',$request->kampus)
    ->where('vaccine_date', '<=', $today)
    ->where('vaccine2_date', '<=', $today);
  

  $rs = $student->get();
 else 
  $rs = Student::get();


return datatables()
->of($rs)->make(true);

将开关更改为另一个 if else 因为如果 $request->stat 更整洁 Y 或 D1，您不想以 undefined variable $rs 结束