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
