ElasticSearch

A ElasticSearch client for Julia

Installation

This package is not currently registered in the General，so you must use github repository address to install

julia> ]
pkg> add https://github.com/lotcher/ElasticSearch.jl.git

Usage

Before using all methods, you need to create an ES instance, like this

using ElasticSearch
es = ES()  # ES("http://:@localhost:9200")

# You can use this method: ES(; host, port, user, password, protocol) to construct the client you need
# Or directly pass in the complete URL like ES("https://elastic:elastic@localhost:9300")

search

You can use the search method to pass in JSON, Dict or built-in query objects

search(es, 'index', "{}")  # be equal to GET /index/_search  body="{}"

# You can also pass in other methods
# search(es, 'index', Dict())
# search(es, 'index', Query([]))

However, when you use complex query statements, it is recommended to use Query, as shown below

search(es=es, index="news") do
	[
        FromBlock(0),
        SizeBlock(10),
        [
            RangeBody("correlation", Dict("gte"=>0.5)),
            RangeBody("emotion", Dict("gte"=>0.5)),
            MultiMatchBody(["contents","title"], "test")
        ] |> MustQueryBlock,
        HighlightBlock(["contents","title"]),
        SourceBlock(["img_urls","id","time","title","url"])
    ] |> Query
end

It is equivalent to constructing the following query statements.

GET news/_Search
{
  "size": 10,
  "from": 0,
  "query": {
    "bool": {
      "must": [
        {
          "range": {
            "correlation": {
              "gte": 0.5
            }
          }
        },
        {
          "range": {
            "emotion": {
              "gte": 0.5
            }
          }
        },
        {
          "multi_match": {
            "fields": [
              "contents",
              "title"
            ],
            "query": "test"
          }
        }
      ]
    }
  },
  "highlight": {
    "fields": {
      "contents": {},
      "title": {}
    }
  },
  "_source": [
    "img_urls",
    "id",
    "time",
    "title",
    "url"
  ]
}

Similarly, you can also construct any ES DSL statements with built-in objects