Hello Ned.
Make sure you check the guide first
https://solr.apache.org/guide/solr/latest/query-guide/searching-nested-documents.html#parent-query-parser
Note that Solr syntax is cumbersome.
Basically you need to combine two queries parent and joined parents.
q=+{!edismax qf='title^5 summary' v=$pq} {!parent which='parent:true'
score=max v='+docType:author country:Au^=10'}&pq=great
After every attempt check debugQuery=true output to make sure the query is
pared as expected.
It make sense to start with JSON Query DSL.
Good luck.
On Tue, Jul 4, 2023 at 5:44 PM nedyalko.zhe...@freelance.de.INVALID
<nedyalko.zhe...@freelance.de.invalid> wrote:
>
> Hello everyone,
>
> we are using Solr for about 2 years and now we want to extend our queries
> to improve the relevance. In our case we have parent and child documents
> and in some cases child documents could help us to improve the way we are
> sorting the results. The problem is we didn't find at the moment an easy
> way to boost parent documents based on their child documents and we think
> we are doing something wrong, as this is a common use case. This could be
> an example of parent and child document:
>
> - Parent document
> {
> "_parent_": true,
> "_root_": "book/1"
> "id": "book/1",
> "docType": "book",
> "title": "Great expectations"
> "summary": "... some text ..."
> }
>
> - Child document
> {
> "_parent_": false,
> "_root_": "book/1"
> "id": "author/1",
> "docType": "author",
> "name": "Charles Dickens"
> "country": "England"
> "rating": 4.6
> }
>
> This could be a query:
> q=great
> &defType=edismax
> &qf=title^5 summary
> &fq=docType:book
> &fl=*,score
>
> Now, how to extend this query if we want to add the rating field from
> author document to the related book document score? Furthermore, what if we
> want to boost books written by Australian authors adding two times their
> rating value? In both cases, how to get only parent documents in the result?
>
> Thank you in advance.
> Ned
>
--
Sincerely yours
Mikhail Khludnev
