聚合MoreLikeThis导致RavenDB [英] Aggregating MoreLikeThis Results in RavenDB

问题描述

我一直在尝试MoreLikeThis捆绑软件，以按照与关键文档相比在"backyardigans"字段中匹配项的数量来带回一组文档.这一切都按预期进行.

I have been trying out the MoreLikeThis Bundle to bring back a set of documents ordered by the number of matches in a field called 'backyardigans' compared to a key document. This all works as expected.

但是我想做的是按3个单独字段加在一起的匹配数进行排序.

But what I would like to do is order by the number of matches of 3 separate fields added together.

示例记录为:

var data = new Data{ 
     backyardigans = "Pablo Tasha Uniqua Tyrone Austin",
     engines = "Thomas Percy Henry Toby",
     pigs = "Daddy Peppa George Mummy Granny"
}; 

如果另一个文档与1个backyardigan 2引擎和1头猪匹配，它将得到4分.

If another document matched 1 backyardigan 2 engines and 1 pig it would get a score of 4

如果另一个文档匹配了2个后院，4个引擎和0头猪，则得分为6

If another document matched 2 backyardigans 4 engines and 0 pigs it would get a score of 6

这些汇总分数将成为我们对结果进行排序的字段，以便它们返回6,4，依此类推.

These aggregated scores would be the field we would order the results by so they would come back 6,4 and so on.

是否可以使用MoreLikeThis捆绑包来实现这一目标?

Is there a way to achieve this with the MoreLikeThis bundle please?

推荐答案

这是不可能的，为此我们仅使用单个场频.

This isn't possible, we use only a single field frequency for this.

这很重要，因为我们需要按字段比较分数，并且如果不考虑每个字段的值，就不可能在全球范围内比较分数.

This is important because we need to compare the score on a field basis, and it isn't really possible to compare it on a global basis without taking into account the per fields values.

请注意，这也是底层Lucene实现的局限性，因此我们对此无能为力.

Note that this is also a limitation in the underlying Lucene implementation, so there isn't much we can do about it.

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