重新索引Elasticsearch，忽略不在映射中的字段 [英] Re-Index Elasticsearch, ignore fields not in mapping

问题描述

尝试在Elasticsearch中测试重新索引API，并遇到以下问题:现有数据包含新索引的严格映射中不存在的字段.有没有办法告诉Elasticsearch简单地忽略这些字段并继续进行下去?

Trying to test out re-index API in elasticsearch and running into issues where existing data contains fields not present in the new index's strict mapping. Is there a way to tell elasticsearch to simply ignore those fields and carry on?

为澄清起见，通过忽略，我的意思是在重新索引过程中不要包括这些字段.

To clarify, by ignore I meant not to include those fields during the re-index process.

推荐答案

如果在运行 reindex 之前可以访问索引设置，则可以执行以下操作:

If you have access to the index settings before running reindex you can just do:

PUT test/_mapping
{
    "dynamic": "false"
}

然后在重新索引完成后将其更改回 strict .

then change it back to strict once reindexing is done.

根据您的评论更新

POST _reindex
{
  "source": {
    "index": "src"
  },
  "dest": {
    "index": "dst"
  },
  "script": {
    "lang": "painless",
    "source": """
    ctx['_source'].remove('email');
    ctx['_source'].remove('username');
    ctx['_source'].remove('name');
    // removing from nested:
    for(item in ctx['_source'].Groups){
        item.remove('GroupName');
        item.remove('IsActive');
    }
    """
  }
}

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