CouchDB 不更新即将发生和过去的事件的视图

发布于 2024-12-07 12:05:55 字数 419 浏览 0 评论 0原文

我在 couchdb 上有以下视图，它只会返回日期大于当前日期的文档，例如：

function (doc) {

    var eventDay = new Date(new Date(doc.start).toDateString()),
        currentDay = new Date(new Date().toDateString());

    if (eventDay > currentDay) {
       emit();
    }
}

因此在这种情况下，视图将始终仅显示未来（即将到来的）事件。我也有相同的倒置视图，仅显示过去的事件。但问题是，显然第二天视图不会更新。所以我必须通过添加一些换行符来手动更新视图，所以我想这会导致“刷新”。

关于如何使这项工作有效的任何想法？

多谢

原文

I have the following view on couchdb that will only return docs with a date greater than the current date like:

function (doc) {

    var eventDay = new Date(new Date(doc.start).toDateString()),
        currentDay = new Date(new Date().toDateString());

    if (eventDay > currentDay) {
       emit();
    }
}

So in this case the view will always show future(upcoming) events only. I also have the same inverted view to show only past events. But the problem is that apparently the view is not being updated on the next day. So I have to update the view manually by adding few line breaks and so I guess this causes a ‘refresh’.

Any ideas on how I could make this work?

Thanks a lot

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浅暮の光 2024-12-14 12:05:55

不要忘记每个条目的地图代码是在文档创建/更改时执行的，因此您将不会获得您所认为的“currentDay”的一致值。

相反，您必须构建一个允许您在查询期间添加此信息的视图。这是一个示例：

funciton(doc){

    //Extract from date object.
    var year = ..;
    var month = ..;
    var day = ..;
    //..

    emit([year,month,day], null);
}

这将创建一个复杂的索引，按（年、月、日）排序。您现在可以使用 startkey/endkey 查询部分范围，例如未来的所有日期。有关详细信息，请参阅查看 API：http://wiki.apache.org/couchdb/HTTP_view_API

Don't forget that the map code per entry is executed on document creation/change, thus you will not have consistent values for what you regard as "currentDay".

Instead, you must build a view that allows you to add this information during the query. Here is an example:

funciton(doc){

    //Extract from date object.
    var year = ..;
    var month = ..;
    var day = ..;
    //..

    emit([year,month,day], null);
}

This will create an complex index, ordered by (year,month,day). You can now query for partial ranges, for instance all dates in the future, by using startkey/endkey. Please see the View API for details: http://wiki.apache.org/couchdb/HTTP_view_API

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