Laravel條件SQL查詢

Question

假設我有一個類似波紋管的功能（在Laravel 4.2中）：

public static function getResult($class_id,$section_id,$session,$term,$setTerm = ture)
{
     $result = self::with('Student','Student.getClass','Student.getSection')
        ->where('class_id',$class_id)
        ->where('section_id',$section_id)
        ->where('exam_year',$session)
        ->where('term',$term)
        ->orderBy('class_roll','ASC')->get();

    return $result;

}

因此，如果$setTerm設置為false，則不應執行(->where('term',$term)) 。

在查詢構建期間如何在Laravel中執行條件操作？

謝謝

Answer 1

您可以將功能更改為：

public static function getResult($class_id,$section_id,$session,$term,$setTerm = true)
{
     $query = self::with('Student','Student.getClass','Student.getSection')
        ->where('class_id',$class_id)
        ->where('section_id',$section_id)
        ->where('exam_year',$session);

    if ($setTerm) {
        $query->where('term',$term);
    }

    return $query->orderBy('class_roll','ASC')->get();    
}

Answer 2

請嘗試一下，這應該可以工作：

public static function getResult($class_id,$section_id,$session,$term,$setTerm = ture)
{
     $result = self::with('Student','Student.getClass','Student.getSection')
        ->where('class_id',$class_id)
        ->where('section_id',$section_id)
        ->where('exam_year',$session);

     if($setTerm){ 
        $result->where('term',$term);
     }

     $result->orderBy('class_roll','ASC')->get();

     return $result;

}