动态laravel SQL查询构建器

Question

I'm trying to create a dynamic query with laravel whereby if certain conditions are met it will add to my query. Here is what I have attempted so far. Any guidance please?

    $Tasks = Task::leftJoin('task_recipients', 'tasks.task_id', '=', 'task_recipients.recipient_task_id');

    if ($filterAssignedToMe !== NULL) {
        $Tasks->where('task_recipients.recipient_user_id', '=', $user_id);
    }

    if ($filterAssignedByMe !== NULL) {
        $Tasks->where('tasks.created_by', '=', $user_id);
    }

    $Tasks->groupBy('task_id');
    $Tasks->get();

Answer 1

Here you go:

$Tasks = Task::leftJoin('task_recipients', 'tasks.task_id', '=', 'task_recipients.recipient_task_id');

if ($filterAssignedToMe !== NULL) {
    $Tasks = $Tasks->where('task_recipients.recipient_user_id', '=', $user_id);
}

if ($filterAssignedByMe !== NULL) {
    $Tasks = $Tasks->where('tasks.created_by', '=', $user_id);
}

$Tasks = $Tasks->groupBy('task_id');
$Tasks = $Tasks->get();

Does this work?