ElasticSearch排名-得分

Question

We are developing an app with java and using elasticsearch java api. We indexed metadatas and want to use ranking/scoring at indexing time or searching time.

And also, I dunno if it is possible to rank/score a result which is choosed/approved by the users when they click a result. It is like to set that result is a popular result and increase its popularity.

How to implement them? Thanks for your suggestions.

Answer 1

elasticsearch is allow us to change/modify the elasticsearch score using the _score .

I hope your requirement is to maintain custom ranking in documents rather than the elasticsearch scoring.

if so you need to design the document like that. Add a filed name like userRank in all the documents and increment the value if a user click the document in the result. using function_score you can add the userRank field value to the calculated _score .

Answer 2

There's a large and complex field called learning to rank that studies how to turn quality information about documents/queries and turn them into relevance ranking rules.

For Elasticsearch specifically, there is this plugin that could help. (disclaimer I'm the creator).