弹性搜索排序

Question

I have a table for some activities like

[
{
  "id": 123,
  "name": "Ram",
  "status": 1,
  "activity": "Poster Design"
},
{
  "id": 123,
  "name": "Ram",
  "status": 1,
  "activity": "Poster Design"
},
{
  "id": 124,
  "name": "Leo",
  "categories": [
    "A",
    "B",
    "C"
  ],
  "status": 1,
  "activity": "Brochure"
},
{
  "id": 134,
  "name": "Levin",
  "categories": [
    "A",
    "B",
    "C"
  ],
  "status": 1,
  "activity": "3D Printing"
}

]

I want to get this data from elastic search 5.5 by sorting on field activity, but I need all the data corresponding to name = "Ram" first and then remaining in a single query.

Answer 1

You can use function score query to boost the result based on match for the filter(this case ram in name).

Following query should work for you

POST sort_index/_search
{
    "query": {
        "function_score": {
            "query": {
                "match_all": {}
            },
            "boost": "5",
            "functions": [{
                "filter": {
                    "match": {
                        "name": "ram"
                    }
                },
                "random_score": {},
                "weight": 1000
            }],
            "score_mode": "max"
        }
    },
    "sort": [{
        "activity.keyword": {
            "order": "desc"
        }
    }]
}

Answer 2

I would suggest using a bool query combined with the should clause. U will also need to use the sort clause on your field.