Yii2验证规则：如何检查日期时间和地点不与其他条目相冲突？

Question

这是我的表event

如你所见

交易1

time_begin: 2016-03-10 07:00:00    
time_end:   2016-03-10 08:00:00  
place:      1

如果用户进行了交易2，然后选择

time_begin: 2016-03-10 07:15:00     
time_end:   2016-03-10 07:45:00 
place:      1

如何在另一个交易中使用检查日期时间和地点的自定义验证规则？

所以我试过这个：

// models.php

public function rules()
{
    return [
        [['title', 'description', 'time_begin', 'time_end', 'place'], 'required'],
        [['description', 'status'], 'string'],
        [['time_begin', 'time_end'], 'safe'],
        [['title'], 'string', 'max' => 150],
        [['place'], 'string', 'max' => 50],
        [['remark'], 'string', 'max' => 145],
        [['time_end'], 'compare','compareAttribute'=>'time_begin','operator'=>'>','message'=>''],
        [['place', 'time_begin'], 'unique', 'targetAttribute' => ['place', 'time_begin'],'message'=>'time and place is busy place select new one.'],
        [['place'], 'checkDate','skipOnEmpty' => false],
    ];
}


public function checkDate($attribute, $params)
{
    $a = Event::find()->where(['>=', 'time_begin', ($this->time_begin)])->count();
    $b = Event::find()->where(['<=', 'time_end', ($this->time_end)])->count();
    $c = Event::find()->where(['=', 'place', ($this->place)])->count();
    $d = ($this->time_begin);
    $e = ($this->time_end);
    $f = ($this->place);
    if (($d > $a) && ($f = $c))
    {
         $this->addError($attribute, 'This place and time is busy, selcet new place or change time.');
    }
}

它不会起作用，因为if (($d > $a) && ($f = $c))是错误的。

但我不知道怎么写条件来检查那件事。

Answer 1

这有用吗：

public function checkDate($attribute, $params)
{
    $thereIsAnOverlapping = Event::find()->where(
        ['AND',
            ['place' => $this->place],
            ['<=', 'time_begin', $this->time_end],
            ['>=', 'time_end', $this->time_begin]
        ])->exists();

    if ($thereIsAnOverlapping) {
         $this->addError($attribute, 'This place and time is busy, selcet new place or change time.');
    }
}

检查是否有另一个事件具有相同的房间并且时间重叠（完全或部分）。

有了这个，我想你可以省略['place', 'time_begin']的规则。