mysql - is null 在 laravel 查询的末尾连接

Question

我正在 Laravel 中打印下面的 Sql 查询

$CheckIfAssigned = Projects::select(DB::Raw('count(projects.id) as projects'))
                ->leftJoin('project_team as pt', 'projects.id', '=', 'pt.project_id')
                ->where(DB::Raw('(projects.id = '.$projectId.') AND ( project_manager_id = '.$LoggedInUserId.' OR pt.employee_id = '.$LoggedInUserId.')'))->toSql();

我得到的结果是:

select count(projects.id) as projects from `projects` left join
 `project_team` as `pt` on `projects`.`id` = `pt`.`project_id` 
where (projects.id = 13) AND ( project_manager_id = 9 OR pt.employee_id = 9) is null

为什么我没写，最后的Sql Query里还是有is null？

Answer 1

where 函数需要第二个参数，而您没有提供，第二个参数的默认值为 null，这就是为什么 is null 附加到您的查询。您可以改用 whereRaw 函数来解决您的问题。