CODEWITHSUNDEEP
elasticsearchnest
vvotekeb
vvotekeb

Reputation: 21

Auto mapping in ElasticSearch NEST client using underscore

ElasticSearch recommends to use underscores for field names. I'm using Nest client and I have the following type:

public class Employee
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
}

Nest client offers a feature called auto mapping that can automatically infer the correct mappings from the properties of the POCO. If use this feature I will get:

"employee": {
    "properties": {
        "firstName": {
            "fields": {
                "keyword": {
                    "type": "keyword",
                    "ignore_above": 256
                }
            },
            "type": "text"
        },
        "lastName": {
            "fields": {
                "keyword": {
                    "type": "keyword",
                    "ignore_above": 256
                }
            },
            "type": "text"
        },
    }
}

But fields does not conform naming convention. There is another feature for defining own mappings using attributes. But I don't want to specify it manually for each field. So is there a possibility to configure client to use underscores for combining words by default?

Upvotes: 0

Views: 527

Answers (1)

Russ Cam
Russ Cam

Reputation: 125488

You can change the default field name inference of using camel casing to instead use snake casing through DefaultFieldNameInferrer(Func<string, string>) on ConnectionSettings

Upvotes: 1

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