來自原始查詢的laravel查詢生成器

Question

美好的一天！ 我是Laravel的新手。 我嘗試了很多方法，但它仍然給我一個錯誤。 我正在嘗試將此sql查詢轉換為eloquent

 Select     t.employee_code, 
            CASE WHEN t.day = '2017-08-19' THEN t.PRESENT ELSE NULL END AS `2017-08-19`,
            CASE WHEN t.day = '2017-08-20' THEN t.PRESENT ELSE NULL END AS `2017-08-20`,
            CASE WHEN t.day = '2017-08-21' THEN t.PRESENT ELSE NULL END AS `2017-08-21`,
            CASE WHEN t.day = '2017-08-22' THEN t.PRESENT ELSE NULL END AS `2017-08-22`,
            CASE WHEN t.day = '2017-08-23' THEN t.PRESENT ELSE NULL END AS `2017-08-23`,
            CASE WHEN t.day = '2017-08-24' THEN t.PRESENT ELSE NULL END AS `2017-08-24`
FROM (
select e.employee_code, 
    Cast(e_l.time_in As date) As Day,
    Case 
        WHEN e_l.time_in IS NULL THEN 'A' 
        WHEN DAYOFWEEK(e_l.time_in) In(7, 1) Then 'W'
        ELSE 'P' 
    end as PRESENT
from employee As e
left join employees_logs As e_l on e.id = e_l.employee_id)
AS t

我嘗試了這種雄辯的方式

public static function statusReport($data){
$start_date = $data['start_date'];
$end_date = $data['end_date'];
$date_array = self::getDatesFromRange($start_date, $end_date);

$query = DB::raw("(Select t.employee_code,
          CASE WHEN t.day = '$start_date' THEN t.Present ELSE NULL END AS '$start_date')");
$query->addSelect(
        DB::raw("(
            SELECT employee.id as emp_id, 
            CONCAT(employee.firstname, " ",employee.lastname) AS employee_name,
            CAST(employees_log.time_in as date) as date_given,
            CASE    WHEN employee_logs.time_in IS NULL THEN 'A'
                    WHEN leave.status_id = 4 AND leave_request.with_pay = 1  THEN 'L'
                    WHEN leave.status_id = 4 AND leave_request.with_pay = 0  THEN 'LOP'
                    WHEN DAYOFWEEK(employee_logs.time) In(7, 1) THEN 1 AS 'W' 
                    ELSE 'P' END as status
            LEFT JOIN employee_logs On employee.id = employees_logs.employee_id
            JOIN leave On employee.id = leave.emp_id
            JOIN leave_request On leave.id = leave_request.leave_id
            WHERE employee_logs.time_in BETWEEN '$start_date' AND '$end_date') As `t`"));
$data = $query->get();
return $data;       

}

預期的輸出是這個查詢將告訴每天員工的狀態。 例如，如果這一天是周末，它將在輸出上顯示“W”。 如果員工缺席'A'並且如果出現'P'。 我希望有人可以幫助我。 提前致謝

Answer 1

首先看一下addSelect方法：

public function addSelect($column)
{
    $column = is_array($column) ? $column : func_get_args();
    $this->columns = array_merge((array) $this->columns, $column);
    return $this;
}

這只是通過與現有選定列合並來添加列。

有關更多說明，請訪問https://laravel.com/docs/5.4/queries#selects

現在我猜你會在不使用addSelect方法的情況下解決你的問題。

我參考了這個