弹性搜索通过另一个文档查找文档 [英] Elasticsearch find documents by another document

问题描述

我想在弹性搜索中搜索与id docId的给定文档完全相同的字段的文档。例如用户使用docId调用api，我想过滤文档，以便返回的所有文档都会在docId中执行某些参数。

I want to search documents in elasticsearch which have exactly same fields as the given document of id docId. For e.g. user calls the api with a docId, I want to filter docs such that all the docs returned fulfills some parameters in docId.

例如我可以像这样查询Elasticsearch：

For example can I query Elasticsearch like this:

POST similarTerms/_search
{
    "fields": [
       "_id", "title"
    ]   ,
    "filter": {
    "query": {"match": {
       "title": doc[docId].title
    }}
    }, 
    "size": 30

}

我知道我可以用docId获取文档，然后我可以准备上述查询，但是避免网络跳跃，甚至几毫秒的时间改进是我的应用程序非常关心的。

I know I can fetch the document with docId and then I can prepare the above query, but can I avoid the network hop somehow as even milliseconds of time improvement is of great concern for my app.

谢谢

推荐答案

这是一个更像这样api的文本书。来自文档的报价：

This is a text-book scenario for "more like this" api. Quote from the docs:

更像这样（mlt）API允许获取一个像一个
指定的文档的文档。这是一个例子：

The more like this (mlt) API allows to get documents that are "like" a specified document. Here is an example:

$ curl -XGET
'http：// localhost：9200 / twitter / tweet / 1 / _mlt ？mlt_fields = tag，content& min_doc_freq = 1'

API简单地导致执行一个具有moreLikeThis
查询http参数将参数匹配到more_like_this
查询）。这意味着请求的正文可以可选地包括
搜索API中的所有请求体选项（aggs，from / to等等）
。在内部，更像这样的API相当于对more_like_this_field查询执行
布尔查询，每个
指定一个查询mlt_fields。

The API simply results in executing a search request with moreLikeThis query (http parameters match the parameters to the more_like_this query). This means that the body of the request can optionally include all the request body options in the search API (aggs, from/to and so on). Internally, the more like this API is equivalent to performing a boolean query of more_like_this_field queries, with one query per specified mlt_fields.

如果您计划使用一个文档进行测试（如我所做）仅用于测试，请确保您还设置 min_term_freq = 0 和 min_doc_freq = 0 ： GET / my_index / locations / 1 / _mlt？min_term_freq = 0& min_doc_freq = 0

If you plan testing this (like I did) with one document only for test, make sure you also set min_term_freq=0 and min_doc_freq=0: GET /my_index/locations/1/_mlt?min_term_freq=0&min_doc_freq=0

这篇关于弹性搜索通过另一个文档查找文档的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！