有条件地在 Laravel 中将 where 子句添加到 leftJoin

Question

我有一些表在我的数据库中引用用户表。 所以我想在不同的表中获取指定一周内发生的活动记录。

它表明当我尝试使用where子句时，星期是undefined的，如下所示。

$week = 6;

$users = User::leftJoin(DB::raw('(SELECT user_id, week_number as week, SUM(amount) as performance_amount FROM performances GROUP BY week_number) AS p'), function ($join) {
      $join->on('p.user_id', '=', 'users.id')->where('p.week', $week);
    })
      ->leftJoin(DB::raw('(SELECT user_id, week_number as week, SUM(amount) as agent_amount FROM agents GROUP BY week_number) AS ag'), function ($join) {
        $join->on('ag.user_id', '=', 'users.id')->where('ag.week', $week);
      })
      ->leftJoin(DB::raw('(SELECT user_id, week_number as week, SUM(amount) as accumulative_amount FROM accumulatives GROUP BY week_number) AS ac'), function ($join) {
        $join->on('ac.user_id', '=', 'users.id')->where('ac.week', $week);
      })
    ->get();

当我硬编码周值时，它返回预期值，但记录周值的 rest 返回null ，如下所示。

Answer 1

对于所有地方，例如：

function ($join) {

你应该确保变量是可见的，如下所示：

function ($join) use ($week) {

您应该阅读https://www.php.net/manual/en/functions.anonymous.php了解更多详情