Elasticsearch - 使用java api删除嵌套对象不工作 [英] Elasticsearch - Deleting nested object using java api not working

问题描述

我有一个包含嵌套对象的弹性搜索文档，我想通过java更新api来删除它们。这里是包含脚本的代码：

  UpdateRequest updateRequest = new UpdateRequest（INDEX，thread，String.valueOf（threadId） ）; 
 updateRequest.script（for（int i = 0; i {ctx._source.messages.remove（i）; i--;}}，ScriptService.ScriptType.INLINE）; 
 client.update（updateRequest）.actionGet（）; 
  

这是我的文档的映射：

  {
thread_and_messages：{
mappings：{
thread：{
properties：{
message：{
type：nested，
include_in_parent：true，
properties：{
message_id：{
type：string
}，
message_nick：{
type：string
}，
message_text b $ btype：string
} 
} 
}，
thread_id：{
type：long
 } 
} 
} 
} 
} 
} 
  

我没有收到任何错误消息，但是当我在索引上运行查询以查找该嵌套文档时尚未被删除。有人可以让我知道我做错了什么？

解决方案

由于 message_id 是一个字符串您的脚本需要解释它，并像这样修改（请参阅 message_id 字段）。有一个第二个错字，因为您的映射声明一个 message_id 字段，但您在脚本中将其命名为 _message_id ：<对于（int i = 0; i ^ ^ ^
| | |
没有下划线添加转义双引号


最后还要确保你有动态脚本启用在您的ES配置

更新

您可以尝试groovy-er从列表中删除元素，即循环和如果不再有，只需使用groovy权限：

 ctx._source.messages.removeAll {it.message_id == \+ messageId +\}
  

通常，这将通过删除所有元素来修改消息其 message_id 字段匹配 messageId 值。

I have an elasticsearch documents which contain nested objects within them, I want to be able to remove them via the java update api. Here is the code containing the script:

UpdateRequest updateRequest = new UpdateRequest(INDEX, "thread", String.valueOf(threadId));
    updateRequest.script("for (int i = 0; i < ctx._source.messages.size(); i++){if(ctx._source.messages[i]._message_id == " + messageId + ")" +
            "{ctx._source.messages.remove(i);i--;}}", ScriptService.ScriptType.INLINE);
    client.update(updateRequest).actionGet();

This is the mapping of my document:

{
  "thread_and_messages": {
    "mappings": {
      "thread": {
        "properties": {
          "messages": {
            "type": "nested",
            "include_in_parent": true,
            "properties": {
              "message_id": {
                "type": "string"
              },
              "message_nick": {
                "type": "string"
              },
              "message_text": {
                "type": "string"
              }
            }
          },
          "thread_id": {
            "type": "long"
          }
        }
      }
    }
  }
}

I'm not receiving any error messages, but when I run a query on the index to find that nested document it hasn't been removed. Could someone let me know what I am doing wrong?

解决方案

Since message_id is a string your script needs to account for it and be modified like this (see the escaped double quotes around the message_id field). There is a second typo, in that your mapping declares a message_id field but you name it _message_id in your script:

"for (int i = 0; i < ctx._source.messages.size(); i++){if(ctx._source.messages[i].message_id == \"" + messageId + "\")"
                                                                                  ^             ^                  ^
                                                                                  |             |                  |
                                                                   no underscore here        add escaped double quotes

Finally also make sure that you have dynamic scripting enabled in your ES config

UPDATE

You can try a "groovy-er" way of removing elements from lists, i.e. no more for loop and if, just use the groovy power:

"ctx._source.messages.removeAll{ it.message_id == \"" + messageId + "\"}"

Normally, that will modify the messages array by removing all elements whose message_id field matches the messageId value.

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