laravel 如何使用 switch 在数据表中使用查询创建多重过滤器

Question

我有 5 个过滤器，kampus，fakulti，程序，学期和状态所以每个过滤器总是被过滤状态这意味着状态过滤器将是开关案例的选择，另一个过滤器将是开关案例示例中的条件：

$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不需要满足所有条件，例如，如果我只想过滤 fakulti，我可以不选择 kampus 和 program 和 semester。我真的需要帮助，我需要它是单独的过滤器，但在同一个查询中

请帮助我，我卡住了大约 3 天，我是 laravel 的新手，使用 eloquent 和数据表

Answer 1

你不必用 if else

它是一个查询生成器，您可以在 $student 查询生成器上堆叠 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);

更改了另一个 if else 的开关，因为如果 $request->stat 更接近 Y 或 D1

，您不想以 undefined variable $rs 结束

laravel 如何使用 switch 在数据表中使用查询创建多重过滤器

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