日期排序弹性搜索

Question

This is my field mapping for the date column in question:

          "date": {
            "type": "date",
            "format": "YYYYMMDD"
          }

And here is my query:

"sort": [{ "date" : { "order" : "desc" } }]

It's bringing back results and in the results there is a sorting element in the results array like the following:

         "sort": [
          1548028800000
        ]

But its very clearly not sorting the sorting the dates properly. is there anything that I am doing wrong?

----- ANSWER -------

Changed the mapping to the following and it worked.

  "date": {
    "type": "date",
    "format": "yyyyMMdd"
  }

Answer 1

I think it is normal behavior. Sort values that are returned are all in milliseconds-since-the-epoch as the documentation says:

https://www.elastic.co/guide/en/elasticsearch/reference/current/date.html