Question

假设我有一个像波纹管一样的功能（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$setTerm设置为false，则不应执行(->where('term',$term))。

如何在查询构建期间在Laravel中执行有条件的事情？

由于

Answer 1

您可以将功能更改为：

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

请尝试一下，这应该有效：

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;

}

Laravel SQL查询条件

2 个答案: