选择与elasticsearch不同(select distinct from elasticsearch)

 我有一组文件，属于少数作者： 
 
[
  { id: 1, author_id: 'mark', content: [...] },
  { id: 2, author_id: 'pierre', content: [...] },
  { id: 3, author_id: 'pierre', content: [...] },
  { id: 4, author_id: 'mark', content: [...] },
  { id: 5, author_id: 'william', content: [...] },
  ...
]
 
 我想根据作者的id检索和分页最佳匹配文档的不同选择： 
 
[
  { id: 1, author_id: 'mark', content: [...], _score: 100 },
  { id: 3, author_id: 'pierre', content: [...], _score: 90 },
  { id: 5, author_id: 'william', content: [...], _score: 80 },
  ...
]
 
 这是我目前正在做的事情（伪代码）： 
 
unique_docs = res.results.to_a.uniq{ |doc| doc.author_id }
 
 分页问题是正确的：如何选择20个“不同”的文件？ 
 
 有些人指的是术语方面 ，但我实际上并没有做标签云： 
 
 
 
 使用CouchDB和elasticsearch进行不同的选择 
 
 
 http://elasticsearch-users.115913.n3.nabble.com/Getting-Distinct-Values-td3830953.html 
 
 
 谢谢， 
 平硐 

I have a collection of documents which belongs to few authors:
 
[
  { id: 1, author_id: 'mark', content: [...] },
  { id: 2, author_id: 'pierre', content: [...] },
  { id: 3, author_id: 'pierre', content: [...] },
  { id: 4, author_id: 'mark', content: [...] },
  { id: 5, author_id: 'william', content: [...] },
  ...
]
 
I'd like to retrieve and paginate a distinct selection of best matching document based upon the author's id:
 
[
  { id: 1, author_id: 'mark', content: [...], _score: 100 },
  { id: 3, author_id: 'pierre', content: [...], _score: 90 },
  { id: 5, author_id: 'william', content: [...], _score: 80 },
  ...
]
 
Here's what I'm currently doing (pseudo-code):
 
unique_docs = res.results.to_a.uniq{ |doc| doc.author_id }
 
Problem is right on pagination: How to select 20 "distinct" documents? 
 
Some people are pointing term facets, but I'm not actually doing a tag cloud:
 
 
 
Distinct selection with CouchDB and elasticsearch
 
 
http://elasticsearch-users.115913.n3.nabble.com/Getting-Distinct-Values-td3830953.html
 
 
Thanks,
 Adit

原文：https://stackoverflow.com/questions/17949400