Replace default Elasticsearch score

Question

I have a user profile with some fields like:

username
gender
nationality
age
language
preferred language
preferred age

Each user should be able to search other users based on some filters (username, gender, age, language) and the final result should be sorted by a score based on preferences (preferred language, preferred age)

Consider this example:

User profile:

username = 'randomdude'
gender = 'male'
nationality = 'italian'
age = '21'
language = 'english,italian,spanish'
preferred language = 'english,italian'
preferred age = '20-30'

Randomdude wants to make a research on our ElasticSearch documents and he would set these filters:

gender = 'female'
nationality = 'spanish'

So the final list should contain ONLY SPANISH FEMALES but it should prefer people with ENGLISH or ITALIAN in the language field and age between 20 and 30, without excluding the rest. So he still can see people that talk in spanish and have 40, but almost at the end of the list.

I'm using the Elasticsearch's php wrapper. I tried using a lot of functions and I think I should use the function score query but I can't make it work because the documentation is very confusing for me.

Exactly, function_score is the way to go. Would be nice to share what you tried and where you failed. Actually, the function_score documentation is probably the best piece of docs that we ever had, as some people said on twitter :) twitter.com/alexbilbie/status/382136147893571584 — javanna
– javanna, Commented Nov 27, 2013 at 14:52

Raffaele Izzia · Accepted Answer · 2013-12-07 15:42:23Z

0

I'm going to understand ES :D I solved this issue with a bool query like this but I'm not sure that is the best solution

{
    "query" : {
        "bool" : {
            "must" :[
                {"term" : { "gender" : "female" } },
                {"term" : { "nationality" : "spanish" } },
            ],
            "should" :[
                {"match" : { "language" : { "query" : "english italian","operator" : "or" } } },
            ]
        }
    }
}

answered Dec 7, 2013 at 15:42

Raffaele Izzia

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