根据字段值对Elasticsearch结果进行排序

Question

Assuming I have 3 documents (users), and they have knowledge of multiple programming languages - with scores associated, as described below, how can I search for multiple fields (multi-match for example), and if some search-keywords hits a language, sort by its score?

    // user1 
    {
        "name": "John Bayes",
        "prog_langs": [
            {
                "name": "python",
                "score": 10
            },
            {
                "name": "java",
                "score": 500
            }
        ]
    }        



    // user2 
    {
        "name": "John Russel",
        "prog_langs": [
            {
                "name": "python",
                "score": 100
            },
            {
                "name": "PHP",
                "score": 200
            }
        ]
    }        



    // user3
    {
        "name": "Terry Guy",
        "prog_langs": [
            {
                "name": "C++",
                "score": 600
            },
            {
                "name": "Javascript",
                "score": 200
            }
        ]
    }

For example: searching "John python" Should return user1 and user2, but user2 showing up first

---

**I've been trying to use sort and functions, but I think they always use lowest/highest/average values of score.

Thanks!

---

[Edit] **In the meantime I got it working in a testing way to see if without full-text/multi-matched works, and I found out I had to make "prog_langs" nested, so I changed the mapping and it works as expected.

Now I'm only missing the part where a full-text search with multi-match merges with current query.

Thanks again!

Answer 1

I managed to fix the query and now it's working as expected.

Before posting my solution, just have to leave a few things to keep in mind:

• I made a new mapping, and added some nested objects, so my original query had to suffer some changes (prog_langs are now of type nested )
• I wanted at least two fields to match, being mandatory which should match at least once

---

    {
        "query": {
            "bool": {
                "must": [
                    {
                        "query": {
                            "match": {
                                "name": {
                                    "query": "john python",
                                    "boost": 5
                                }
                            }
                        }
                    },
                    {
                        "bool": {
                            "should": [
                                {
                                    "nested": {
                                        "path": "prog_langs",
                                        "query": {
                                            "match": {
                                                "prog_langs.name": {
                                                    "query": "john python",
                                                    "boost": 5
                                                }
                                            }
                                        }
                                    }
                                }
                            ]
                        }
                    }
                ],
                "should": [
                    {
                        "function_score": {
                            "query": {
                                "match": {
                                    "prog_langs.name": "john python"
                                }
                            },
                            "functions": [
                                {
                                    "script_score": {
                                        "script": "_score * (1 + doc['prog_langs.score'].value)"
                                    }
                                }
                            ]
                        }
                    }
                ]
            }
        },
        "highlight": {
            "fields": {
                "name": {},
                "prog_langs.name": {}
            }
        }
    }