php怎样在Mongodb中查询一个每年都重复的日程呢?
需求是查询一段日期内的日程,有的日程是每年(月、日)重复的,怎样在一次find中取到期间内的日程呢?
重复的意思是,添加的今年5月1日的日程,我查询明年4到5月日程的时候,还是可以查到他
希望能够给个思路
回复内容:
需求是查询一段日期内的日程,有的日程是每年(月、日)重复的,怎样在一次find中取到期间内的日程呢?
重复的意思是,添加的今年5月1日的日程,我查询明年4到5月日程的时候,还是可以查到他
希望能够给个思路
如果有这种需求,那就应该在存数据的时候多存一些字段用来表达“月”和“日”的信息,这和 php 没关系,只是 mongodb 数据结构的设计问题。
比如加一个字段:
{ "repeat_date": { "month": 5, "day": 1 } }
查询的时候就可以写:
// 找到所有月份为 5 的 db.foo.find({"repeat_date.month": 5})
这个 repeat_date
字段仅在每年重复的日程上添加,对于不重复的日程不需要添加。
如果需要同时查出某个时间段中所有日程,包括每年重复的日程,可以这样查询:
// 假设每个日程都有一个类型为 `ISODate` 的 `date` 字段表示日程发生在哪一天 db.schedule.find({ $or: [ { date: { $gte: new Date("2014-03-01 00:00:00"), $lt: new Date("2014-05-01 00:00:00") }, }, { "repeat_date.month": { $gte: 3, $lt: 5 } } ] })

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