Elastic - Sorting value with priority

问题

So, i have 1 field, we can call it timeInt. the type value is integer. The value is counted from 0. And i want to sort it with priority condition. 0 / 1 will be placed on the top then the bigger value is placed after value 0 / 1. Ex:

0 1 100 99 98 etc...

I don't know how can i achieve that, i already search on google, and still stucked, i just try query sort like this:

sort:[{timeInt:{'order':'asc'}}]

but it just ascending sort

let newQuery = {
      index: `${config.get('/indexElastic').needAction}`,
      type: 'notification',
      body: {
        from: from, size: size,
        query: match_all: {},
        sort:[{timeInt:{'order':'asc'}}]
      }
    };

Expected result:

0 1 100 99 98 etc...

Current result:

0 1 2 3 4 etc...

回答1:

You can apply boost to the values 0 and 1 in a should and then modify your sort query by including _score field as shown below.

Also looking at your expected result, the sorting order for timeInt would be desc and not asc.

POST <your_index_name>/_search
{
  "query": {
    "bool": {
      "should": [
        {
          "match_all": {}
        },
        {
          "match": {
            "timeInt": {
              "query": 0,
              "boost": 3
            }
          }
        },
        {
          "match": {
            "timeInt": {
              "query": 1,
              "boost": 2
            }
          }
        }
      ]
    }
  },
  "sort": [
    { "_score": "desc"},
    {
      "timeInt": {
        "order": "desc"
      }
    }
  ]
}

Below is how your results would appear:

{
  "took" : 3,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 5,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "myintindex",
        "_type" : "_doc",
        "_id" : "2",
        "_score" : 4.0,
        "_source" : {
          "timeInt" : 0
        },
        "sort" : [
          4.0,
          0
        ]
      },
      {
        "_index" : "myintindex",
        "_type" : "_doc",
        "_id" : "1",
        "_score" : 3.0,
        "_source" : {
          "timeInt" : 1
        },
        "sort" : [
          3.0,
          1
        ]
      },
      {
        "_index" : "myintindex",
        "_type" : "_doc",
        "_id" : "3",
        "_score" : 1.0,
        "_source" : {
          "timeInt" : 99
        },
        "sort" : [
          1.0,
          99
        ]
      },
      {
        "_index" : "myintindex",
        "_type" : "_doc",
        "_id" : "4",
        "_score" : 1.0,
        "_source" : {
          "timeInt" : 98
        },
        "sort" : [
          1.0,
          98
        ]
      },
      {
        "_index" : "myintindex",
        "_type" : "_doc",
        "_id" : "5",
        "_score" : 1.0,
        "_source" : {
          "timeInt" : 97
        },
        "sort" : [
          1.0,
          97
        ]
      }
    ]
  }
}

Note: All the other documents have the _score of 1, because of the match_all query.

Let me know if this helps!

来源：https://stackoverflow.com/questions/57518283/elastic-sorting-value-with-priority