Question

我编写了以下逻辑来识别可用插槽，以便在我使用yii框架开发的系统中启动会议请求。

// checks for availabilty of teacher
public function isTeacherAvailable($subjectId, $startAt, $endAt) {
    $success = true;
    $meetings = Meeting::model()->findAll("subjectId=:subjectId AND endAt>=:endAt AND type=:type", array(':subjectId' => $subjectId, ':endAt' => date('Y-m-d H:i:s'), ':type' => '0')); // get all the meetings for subject that is not ended and active.
    foreach ($meetings as $meeting) {
        if (($startAt >= $meeting->startAt) && ($startAt <= $meeting->endAt)) {
            $success = false; // trying to create inside a existing slot.
            break;
        } else if (($endAt >= $meeting->startAt) && ($endAt <= $meeting->endAt)) {
            $success = false; // trying to create inside a existing slot.
            break;
        }
    }
    return $success;
}

这是输入的示例。 StartAt：2014-02-10 08:45:00 endAt：2014-02-10 08:49:00 ..你可以跳过subjectId

有了这个我能够阻止在已经为给定的StartAt和endAt安排会议时创建会议请求。

我遇到的一个问题是，当我插入这样的东西时它会失败。

StartAt：2014-02-10 08:40:00 endAt：2014-02-10 08:55:00 （新请求在现有广告位之外）

所以我们的想法是在会议安排从上午8点到上午9点。它不应该允许从早上7点到10点创建一个会议，就像它停在上午7:30到8.30 上午和上午8:30到9:00 。

让我知道我做错了什么。

Answer 1

我认为错误是在两个条件下进行的唯一评估：

    if CONDITION1 then FALSE else if CONDITION2 then FALSE

这两个条件应在OR中测试：

    if CONDITION1 or CONDITION2 then FALSE

Answer 2

试试这个

// checks for availabilty of teacher
public function isTeacherAvailable($subjectId, $startAt, $endAt) {
    $success = true;
    $meetings = Meeting::model()->findAll("subjectId=:subjectId AND endAt>=:endAt AND type=:type", array(':subjectId' => $subjectId, ':endAt' => date('Y-m-d H:i:s'), ':type' => '0')); // get all the meetings for subject that is not ended and active.
    foreach ($meetings as $meeting) {
        if (($startAt >= $meeting->startAt) && ($startAt <= $meeting->endAt)) {
            $success = false; // trying to create inside a existing slot.
            break;
        } else if (($endAt >= $meeting->startAt) && ($endAt <= $meeting->endAt)) {
            $success = false; // trying to create inside a existing slot.
            break;
        } else if (($startAt <= $meeting->startAt && $endAt >= $meeting->startAt) || ($startAt >= $meeting->startAt && $startAt <= $meeting->endAt)) {
            $success = false; // trying to create inside a existing slot.
            break;
        }
    }
    return $success;
}

Answer 3

我按照以下方式编写了函数来实现解决方案。

// checks for availabilty of teacher
public function isTeacherAvailable($subjectId, $startAt, $endAt) {
    $success = true;
    $meetings = Meeting::model()->findAll("subjectId=:subjectId AND endAt>=:endAt AND type=:type", array(':subjectId' => $subjectId, ':endAt' => date('Y-m-d H:i:s'), ':type' => '0')); // get all the meetings for subject that is not ended and active.
    foreach ($meetings as $meeting) {
        if (($startAt >= $meeting->startAt) && ($startAt <= $meeting->endAt)) {
            $success = false; // trying to create inside a existing slot.
            break;
        } else if (($endAt >= $meeting->startAt) && ($endAt <= $meeting->endAt)) {
            $success = false; // trying to create inside a existing slot.
            break;
        } else if (date('Y-m-d', strtotime($startAt)) == date('Y-m-d', strtotime($meeting->startAt)) && date('Y-m-d', strtotime($endAt)) == date('Y-m-d', strtotime($meeting->endAt))) { //if same date
            if ($startAt <= $meeting->startAt && $endAt >= $meeting->endAt) {
                $success = false; // trying to create outside a existing slot when there is one in middle on same day.
                break;
            }
        }
    }
    return $success;
}

使用PHP时，检查开始和结束时间之间的可用时间

3 个答案: