spring-data - Spring Boot & MongoDB 如何删除 '_class' 列？

Question

当将数据插入 MongoDB Spring Data 时添加自定义“_class”列，在使用 Spring Boot & MongoDB 时有没有办法消除“class”列？

还是我需要创建自定义类型映射器？

任何提示或建议？

Answer 1

该问题的最新答案，使用嵌入式 mongo db 进行测试用例:
我引自 http://mwakram.blogspot.fr/2017/01/remove-class-from-mongo-documents.html

Spring Data MongoDB adds _class in the mongo documents to handle polymorphic behavior of java inheritance. If you want to remove _class just drop following Config class in your code.

package com.waseem.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.mongodb.MongoDbFactory;
import org.springframework.data.mongodb.core.convert.DbRefResolver;
import org.springframework.data.mongodb.core.convert.DefaultDbRefResolver;
import org.springframework.data.mongodb.core.convert.DefaultMongoTypeMapper;
import org.springframework.data.mongodb.core.convert.MappingMongoConverter;
import org.springframework.data.mongodb.core.mapping.MongoMappingContext;

@Configuration
public class MongoConfig {

 @Autowired MongoDbFactory mongoDbFactory;
 @Autowired MongoMappingContext mongoMappingContext;

 @Bean
 public MappingMongoConverter mappingMongoConverter() {

  DbRefResolver dbRefResolver = new DefaultDbRefResolver(mongoDbFactory);
  MappingMongoConverter converter = new MappingMongoConverter(dbRefResolver, mongoMappingContext);
  converter.setTypeMapper(new DefaultMongoTypeMapper(null));

  return converter;
 }
}