我正在使用 CodeIgniter 框架。我想获得特定日期的所有可用房间。算法如下:
我将给出一个日期来检查房间的可用性。
系统应查看表“hotelbrancheshasreservations”,并应根据分店 ID 和 status = 'active'.
选择预订 id
然后选择所有活动的预订并与预订表连接。
仅在加入后从“预订”表中提取那些在提供的日期未预订且处于活动状态的预订。此表中会有数千个预订,但应该跳过。
然后将有效预订与“预订房间”表连接起来,这将提供房间号。虽然目前已预订,但可以预订其他与当前预订日期不冲突的日期。
最后,当前预订的房间也加入到“hotelrooms”表中,并返回所有可用房间以供新预订。
所以一个房间可以多次预订,但日期不同。
如果我提供像
$startdate = 2016-05-16
和 $enddate = 2016-05-27
这样的日期,我无法在 CodeIgniter 中开发适当的查询来获取所有可用房间。
MySQL Db 中的数据类型是
date
。
我正在 CodeIgniter
中运行以下查询function joinReserv($branchid, $startdate, $enddate, $db)
{
$status = "active";
$this->$db->trans_start();
$this->$db->select('reservationid, startdate, enddate, hotelbrancheshasreservations.status');
$this->$db->from('reservation');
$this->$db->where('( "'. $startdate . '" BETWEEN startdate AND enddate ) OR ( "'. $enddate . '" BETWEEN startdate AND enddate)');
$this->$db->where('(startdate BETWEEN "' . $startdate . '" AND "' . $enddate . '") OR (enddate BETWEEN "' . $startdate . '" AND "' . $enddate . '")');
$this->$db->join('hotelbrancheshasreservations', 'hotelbrancheshasreservations.reservations_reservationsid = reservation.reservationid');
$this->$db->where('(hotelbrancheshasreservations.status = '."'".$status."')");
$this->$db->where('(hotelbrancheshasreservations.hotelbranches_hotelbranchesid ='."'".$branchid."')");
$result = $this->$db->get()->result_array();
$this->$db->trans_complete();
return $result;
}
如果我提供
startdate 2016-05-24
和enddate 2016-05-26
,那么它会选择如下预订:
[{"reservationid":"KHAN2016Q224","startdate":"2016-05-23","enddate":"2016-05-27","status":"pending"}]
应跳过此预订,因为它在表中未激活 “hotelbrancheshasreservations”
它选择那些在提供的日期内但不活跃的预订。我想选择那些在指定日期有效且可用的预订。
您现在的陈述将翻译为
select reservationid, startdate, enddate, hotelbrancheshasreservations.status
from reservation
join hotelbrancheshasreservations
on hotelbrancheshasreservations.reservations_reservationsid
= reservation.reservationid
where ("$startdate" BETWEEN startdate AND enddate)
OR ("$enddate" BETWEEN startdate AND enddate)
AND (startdate BETWEEN "$startdate" AND "$enddate")
OR (enddate BETWEEN "$startdate" AND "$enddate")
AND (hotelbrancheshasreservations.status = '$status')
AND (hotelbrancheshasreservations.hotelbranches_hotelbranchesid = '$branchid');
因此您的
AND (hotelbrancheshasreservations.status = '$status')
将仅适用于您的最后一个日期部分 (enddate BETWEEN "$startdate" AND "$enddate")
。
您可以使用
group_start()
/group_end()
在包含 OR
的两个选择周围添加括号,或者直接添加它们:
$this->$db->select('reservationid, startdate, enddate, hotelbrancheshasreservations.status');
$this->$db->from('reservation');
$this->$db->where('(( "'. $startdate . '" BETWEEN startdate AND enddate )
OR ( "'. $enddate . '" BETWEEN startdate AND enddate))');
$this->$db->where('((startdate BETWEEN "' . $startdate . '" AND "' . $enddate . '")
OR (enddate BETWEEN "' . $startdate . '" AND "' . $enddate . '"))');
$this->$db->join('hotelbrancheshasreservations',
'hotelbrancheshasreservations.reservations_reservationsid = reservation.reservationid');
$this->$db->where('(hotelbrancheshasreservations.status = '."'".$status."')");
$this->$db->where('(hotelbrancheshasreservations.hotelbranches_hotelbranchesid
='."'".$branchid."')");
如果您使用这样的自定义查询而没有安全活动记录可以提供,请确保您的字符串是干净的/转义的。