Solr - 具有许多子约束的块连接父查询 [英] Solr - Block join Parent query with many Children constraints

问题描述

该问题适用于以下嵌套文档:

The question is applied for the following nested documents:

<doc>
  <field name="id">1</field>
  <field name="title">Solr has block join support</field>
  <field name="content_type">parentDocument</field>
  <doc>
    <field name="id">11</field>  
    <field name="type">comment</field>  
    <field name="comments">SolrCloud supports it too!</field>
  </doc>
  <doc>
    <field name="id">12</field>  
    <field name="type">publisher</field>  
    <field name="address">England</field>
    ....
  </doc>
</doc>
....

我的问题是，如何编写允许对多个嵌套子文档进行约束的 Block Join Parent Query?我确实尝试了以下方法，但没有奏效:

My question is, how to write the Block Join Parent Query which allows to have constraints on multiple nested children documents? I did try the following, but it did not work:

{!parent which="content_type:accommodation"}
(
  (+type:comment +comments:SolrCloud) AND
  (+type:publisher +address:England)
) 

0 作为结果返回！

推荐答案

对于您的用例，您可以只使用多个块连接过滤器:

For your use case you can just multiple block join filters:

q=*:*&
fq={!parent which="content_type:accommodation"}(+type:comment +comments:SolrCloud)&
fq={!parent which="content_type:accommodation"}(+type:publisher +address:England)

第一个过滤器语句会找出哪些父文档有满足条件(+type:comment +comments:SolrCloud)的子文档.

the first filter clouse will find which parent documents have a child which satisfies condition (+type:comment +comments:SolrCloud).

第二个过滤器子句将对满足第一个过滤器的父文档子集进行操作.它会在这个子集中找到满足条件(+type:publisher +address:England)的父文档.

The second filter clouse will operate over subset of parent documents that satisfy the first filter. And it will find in this subset the parent documents that satisfy condition (+type:publisher +address:England).

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