return elasticsearch 更新后如何获取文档？

Question

我试图在更新后更新几个文档字段和 return 完整文档。我使用 elastic4s 1.3.4, elasticsearch 1.4.3（作为服务器）。

这是一个代码：

import scala.concurrent.ExecutionContext.Implicits.global
object ElasticsearchTester extends App {
  private val settings: Settings = ImmutableSettings.settingsBuilder().put("cluster.name", "clustername").build()
  private val client: ElasticClient = ElasticClient.remote(settings, ("localhost", 9300))

  val initial = """
    |{
    |   "name":"jojn",
    |   "surname":"olol"
    |}
  """.stripMargin

  val updateString = """
    |{
    |   "surname":"123",
    |   "global": {
    |     "new":"fiedl"
    |   }
    |}
  """.stripMargin

  import com.sksamuel.elastic4s.ElasticDsl._
  val future = client.execute {
    create index "my_index"
  }.flatMap { r=>
    client.execute {
      index into "my_index/user" doc StringDocumentSource(initial)
    }.flatMap { re=>
      println("Ololo indexed is: " + initial)
      println("Ololo indexed id: " + re.getId)
      client.execute {
        update id re.getId in "my_index/user" doc StringDocumentSource(updateString) docAsUpsert true params  ("fields" -> "_source")
      }.map{res=>
        println("Ololo result is: " + res.getGetResult.sourceAsString())

      }
    }
  }

  Await.result (future, 20.seconds)
  println("Ololo ok")
}

为什么我在行 res.getGetResult.sourceAsString() 中得到 NullPointerException？似乎更新响应不包含更新操作后的文档。是否可以从更新响应中 return 记录 _source？

Answer 1

Elastic4s 似乎没有 api in UpdateDefinition（现在是 23.07.2015）来设置字段。然而它的构建器支持这个操作，下面的代码就像肮脏的黑客，但它按预期工作，只需将字段直接设置为 _builder:

val updateRequest = update id re.getId in "my_index/user" doc StringDocumentSource(updateString) docAsUpsert true
updateRequest._builder.setFields("_source")
client.execute {
    updateRequest
    }.map { res=>
        println("Ololo result is: " + res.getGetResult.sourceAsString())
    }
}

打印

Ololo indexed id: AU66n1yiYVxOgU2h4AoG
Ololo result is: {"name":"jojn","surname":"123","global":{"new":"fiedl"}}
Ololo ok

备注

Elasticsearch support 在更新请求后返回字段。

已更新

Elastic4s 在 this 提交后通过 UpdateDsl.includeSource 或 UpdateDsl.setFields 方法支持此功能。

return elasticsearch 更新后如何获取文档？

How return document from elasticsearch after update?

scala

elasticsearch

elastic4s