How to Update ElasticSearch index mapping and add multi-fields into it?

Question

I have created the index with following setting and mapping:

PUT test

    {
        "settings": {
            "number_of_shards": 2,
            "number_of_replicas": 1
        },
        "mappings": {
            "documents": {
                "properties": {
                    "title": {
                        "type": "text",
                        "fields": {
                            "raw": {
                                "type": "keyword"
                            }
                        }
                    },
                    "url": {
                        "type": "text",
                        "fields": {
                            "raw": {
                                "type": "keyword"
                            }
                        }
                    },
                    "tags": {
                        "type": "keyword"
                    }
                }
            }
        }
    }

In above mapping, I have declared tags as type keyword for the exact match.and added 10 documents into it for example:

PUT test/documents/1
{
  "title":"John",
  "url":"/john",
  "tags":["name question","how"]
}

but I want to add multi-fields support for tags to support partial tags matching so I have updated index mapping as follows:

PUT test/documents/_mapping
{
    "properties": {
        "title": {
            "type": "text",
            "fields": {
                "raw": {
                    "type": "keyword"
                }
            }
        },
        "url": {
            "type": "text",
            "fields": {
                "raw": {
                    "type": "keyword"
                }
            }
        },
        "tags": {
            "type": "keyword",
            "fields": {
                "raw": {
                    "type": "text"
                }
            }
        }
    }
}

is this right way to updae index mapping? Can now my tags support partial matching? Please help me into this

dadoonet · Accepted Answer · 2018-07-23 08:56:44Z

4

Yes. That's the way to update that field. Although I'd not use raw as the name for the subfield. It's not the common to have raw as text type. I'd name it something like fulltext for example.

Anyway, even if you update the mapping you have to reindex all the documents.

Update by Query will do that:

curl -X POST "localhost:9200/test/_update_by_query?conflicts=proceed"

By the way (and not related to your question) I'd use _doc as the type name so you will be even more ready for the removal of types in the future.

answered Jul 23, 2018 at 8:56

dadoonet

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