Question

在我的数据库表中，我有一个名为student add的表，我希望获取具有以下所有条件的特定学生，这些条件存储在filters数组中，并带有其他选项（“like name可以是middlename或lastname”）

$filters = [
                ['type' => 'name', 'value' => 'Abhishek'],
                ['type' => 'roll', 'value' => '0013']
            ];

我正在尝试使用以下代码
获取该数据

 $student = Student::where(function ($query) use ($filters) {

            foreach($filters as $filter) {
                switch($filter['type']){
                    case 'name' :
                        $query->where('firstname', $filter['value'])
                        ->orWhere('middlename', $filter['value'])
                        ->orWhere('lastname', $filter['value']);
                        break;
                    case 'roll' :
                        $query->where('rollnumber', $filter['value']);
                        break;

                }
            }
        })
        ->get();

我在这里使用advance where子句但它运行的第一个参数（如名称）只表示我得到的值其中name = filters ['value'] 为什么它如此

Answer 1

为什么在查询中使用案例？只需用多个where子句写2，然后用if语句选择它：）

Answer 2

对于这个SQL

select * from `students` where ((`firstname` = ? or `middlename` = ? or `lastname` = ?) and `rollnumber` = ?)

    $student = Student::where(function ($query) use ($filters) {

        foreach($filters as $filter) {
            switch($filter['type']){
                case 'name' :
                    $query->where(function ($query) use ($filter) {
                        $query->where('firstname', $filter['value'])
                            ->orWhere('middlename', $filter['value'])
                            ->orWhere('lastname', $filter['value']);
                    });//This will add a parenthesis for all wheres
                    break;
                case 'roll' :
                    $query->where('rollnumber', $filter['value']);
                    break;

            }
        }
    })
        ->get();//Replace get with toSql to see SQL

对于这个SQL

select * from `students` where ((`firstname` = ? or `middlename` = ? or `lastname` = ?) or `rollnumber` = ?)

    $student = Student::where(function ($query) use ($filters) {

        foreach($filters as $filter) {
            switch($filter['type']){
                case 'name' :
                    $query->orWhere(function ($query) use ($filter) {//add or where for or where
                        $query->where('firstname', $filter['value'])
                            ->orWhere('middlename', $filter['value'])
                            ->orWhere('lastname', $filter['value']);
                    });//This will add a parenthesis for all wheres
                    break;
                case 'roll' :
                    $query->orWhere('rollnumber', $filter['value']);//add or where for or where
                    break;

            }
        }
    })
        ->get();//Replace get with toSql to see SQL

Eloquent where子句有多个condtion过滤器

2 个答案: