如何使用NEST弹性搜索来批量插入Json? [英] How to bulk insert Json using NEST elasticsearch?

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问题描述

我试图使用Nest将多个记录插入到我的数据库中。使用IndexMany类进行插入确实有效,但是我也需要通过json字符串插入对象。



我看过github,并找到了一些例子来使用RAWclient。下面的代码示例我插入我的json。

 > var twitter = _jsonData; 
> var result = client.Raw.BulkPost(
> new {twitter}
>,qs => qs
> //.Replication(ReplicationOptions.Async)
&ReReresh(true));

一些附加信息:



jsondata:

  tweet tweet1 = new tweet {id =104,name =test104,lastname =test107}; // ect .... 
列表< tweet>数据; //添加多个tweet对象
string json = Newtonsoft.Json.JsonConvert.SerializeObject(data);

var twitter:



pre> {
twitter:[{'name':'test104','lastname':'test107','id':'104'}, { '名称': 'test105', '名字': 'test108', 'ID': '105'},{ '名称': 'test106', '名字': 'test109', 'ID': '106' }]
}

结果我从数据库中收到:

  {error:意外结束输入:OBJECT的预期关闭标记(来源:[B @ 10893e4; line:1,column:0])\\\
at [Source:[B @ 10893e4; line:2,column:3]}

有谁知道问题可能是什么?或者我在我的json /代码中丢失了什么?

解决方案

你的json对于弹性搜索批量操作是不正确的。请参阅文档



在批量请求中,每个数据对象都应该有一个命令,因为单个批量请求可以包含插入,更新或删除,而不仅仅是插入。
所以你的json应该看起来像

  {index:{_index:twitter,_type :tweets}} \\\

{'name':'test104','lastname':'test107','id':'104'} \\\

{index :{_index:twitter,_type:tweets}} \\\

{'name':'test105','lastname':'test108','id' } \\\

{index:{_index:twitter,_type:tweets}} \\\

{'name':'test106','lastname' :'test109','id':'106'} \\\

为了减少重复的开销命令可以将一些参数移动到请求uri。那么json可以更短:

  {index:{}} \\\

{'name' :'test104','lastname':'test107','id':'104'} \\\



  var result = client.Raw.BulkPost(new {twitter} ,twitter,tweets); 


I'am trying to insert multiple records into my database using Nest. Inserting using IndexMany class does work however I also need to insert objects by json string.

I did look on github, and found some examples how to use the RAWclient. Below a code example I insert my json.

    > var twitter = _jsonData;          
    > var result = client.Raw.BulkPost(
    >               new { twitter }
    >               , qs => qs
    >                   //.Replication(ReplicationOptions.Async)
    >                   .Refresh(true)          );

some additional info:

jsondata:

tweet tweet1 = new tweet { id = "104", name = "test104", lastname = "test107" }; //ect....
List<tweet> data; //multiple tweet objects are added
string json = Newtonsoft.Json.JsonConvert.SerializeObject(data);

var twitter:

{
      "twitter": "[{'name':'test104','lastname':'test107','id':'104'},{'name':'test105','lastname':'test108','id':'105'},{'name':'test106','lastname':'test109','id':'106'}]"
}

result i receive from the database:

{"error":"Unexpected end-of-input: expected close marker for OBJECT (from [Source: [B@10893e4; line: 1, column: 0])\n at [Source: [B@10893e4; line: 2, column: 3]"}

Does anyone know what the issue might be? or what I'am missing in my json/code snipped?

解决方案

Your json is not correct for elasticsearch bulk operation. See the documentation.

In a bulk request every data object should be preceded by a command because a single bulk request can contain inserts, updates or deletes, not just inserts. So your json should look like

  { "index" : { "_index" : "twitter", "_type" : "tweets" } }\n
  {'name':'test104','lastname':'test107','id':'104'}\n
  { "index" : { "_index" : "twitter", "_type" : "tweets" } }\n
  {'name':'test105','lastname':'test108','id':'105'}\n
  { "index" : { "_index" : "twitter", "_type" : "tweets" } }\n
  {'name':'test106','lastname':'test109','id':'106'}\n

To reduce overhead from repetitive commands you can move some arguments to the request uri. Then the json can be shorter:

  { "index" : { } }\n
  {'name':'test104','lastname':'test107','id':'104'}\n

In IRawElasticClient that means moving them to BulkPost arguments.

  var result = client.Raw.BulkPost(new { twitter }, "twitter", "tweets");

这篇关于如何使用NEST弹性搜索来批量插入Json?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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