Solr父子查询

Question

I am trying to query solr documents based on criteria both in parent and a child.

Documentation: BlockJoinQueryParsers instructs to use a query like:

q= +title:join +{!parent which="content_type:parentDocument"}comments:SolrCloud

where title is a parent's field and comments is child's. A query like this works fine. However, I can not add any other condition on the child. No matter what statement I try to put after the '}', it fails with SyntaxError. For example

q= +title:join +{!parent which="content_type:parentDocument"}(comments:SolrCloud AND id:4)

fails with SyntaxError.

I think I can use a workaround by utilizing fq parameter, but I wonder if it is possible to achieve in one query.

PS I am using Solr 6.6, and upgrading to version 7 can be considered.

Answer 1

You need to use local parameters , basically your query is equal to

q= +title:join +{!parent which="content_type:parentDocument" v='comments:SolrCloud'}

which could be rewritten even further:

q= +title:join +{!parent which="content_type:parentDocument" v=$qq}&qq=+comments:SolrCloud +whatever:ClauseYouWant