FieldNamingStrategy 与 Spring 数据 Elasticsearch

Question

我正在配置一个 elasticsearch spring 应用程序，并按照文档创建了这个 RestHighLevelClient：

@Configuration
public class RestClientConfig extends AbstractElasticsearchConfiguration {

    @Override
    @Bean
    public RestHighLevelClient elasticsearchClient() {

        final ClientConfiguration clientConfiguration = ClientConfiguration.builder()  
            .connectedTo("localhost:9200")
            .build();

        return RestClients.create(clientConfiguration).rest();                         
    }
}

现在我希望我的所有文档都具有 snake_case 作为命名策略，并且在文档中这是我发现的：

Without further configuration, Spring Data Elasticsearch will use the property name of an object as field name in Elasticsearch. This can be changed for individual field by using the @Field annotation on that property.

It is also possible to define a FieldNamingStrategy in the configuration of the client (Elasticsearch Clients). If for example a SnakeCaseFieldNamingStrategy is configured, the property sampleProperty of the object would be mapped to sample_property in Elasticsearch. A FieldNamingStrategy applies to all entities; it can be overwritten by setting a specific name with @Field on a property.

问题是，如何一次配置客户端？

Answer 1

只需覆盖配置中的 fieldNamingStrategy() 方法 class:

@Configuration
public class RestClientConfig extends AbstractElasticsearchConfiguration {

    @Override
    @Bean
    public RestHighLevelClient elasticsearchClient() {

        final ClientConfiguration clientConfiguration = ClientConfiguration.builder()  
            .connectedTo("localhost:9200")
            .build();

        return RestClients.create(clientConfiguration).rest();                         
    }

    @Override
    protected FieldNamingStrategy fieldNamingStrategy() {
        return new SnakeCaseFieldNamingStrategy();
    }

}

FieldNamingStrategy 与 Spring 数据 Elasticsearch

FieldNamingStrategy with Spring Data Elasticsearch

field-names

elasticsearch

spring-data-elasticsearch

resthighlevelclient