How to customize MappingMongoConverter (setMapKeyDotReplacement) in Spring-Boot without breaking the auto-configuration?

问题

How could I customize the MappingMongoConverter within my Spring-Boot-Application (1.3.2.RELEASE) without changing any of the mongo-stuff which is autoconfigured by spring-data?

My current solution is:

@Configuration
public class MongoConfig {

  @Autowired
  private MongoDbFactory mongoFactory;

  @Autowired
  private MongoMappingContext mongoMappingContext;

  @Bean
  public MappingMongoConverter mongoConverter() throws Exception {
    DbRefResolver dbRefResolver = new DefaultDbRefResolver(mongoFactory);
    MappingMongoConverter mongoConverter = new MappingMongoConverter(dbRefResolver, mongoMappingContext);
    //this is my customization
    mongoConverter.setMapKeyDotReplacement("_");
    mongoConverter.afterPropertiesSet();
    return mongoConverter;
  }
}

Is this the right way or do I break some stuff with this?
Or is there even a more simple way to set the mapKeyDotReplacement?

回答1:

That's the right way to do it. The auto-configured MappingMongoConverter is annotated with @ConditionalOnMissingBean(MongoConverter.class), so adding your own MappingMongoConverter bean will cause the auto-configuration to back off in favour of your custom converter.

One minor correction: there's no need for you to call mongoConverter.afterPropertiesSet(). The container will call that for you.

回答2:

I have run into this issue in the latest version of spring boot. Your approach did not work for me or the accepted answer...my boot app seemed to ignore my custom mapping converter.

So what I did in the config class I autowired in the MappingMongoConverter that boot uses and then set the setMapKeyDotReplacement on that.

@Autowired
private MappingMongoConverter mongoConverter;

// Converts . into a mongo friendly char
@PostConstruct
public void setUpMongoEscapeCharacterConversion() {
    mongoConverter.setMapKeyDotReplacement("_");
}

回答3:

Also there's shorter version:

@Autowired
void setMapKeyDotReplacement(MappingMongoConverter mappingMongoConverter) {
    mappingMongoConverter.setMapKeyDotReplacement("_");
}

Remember to put it into class that Spring will be aware of - e.g. class annotated with @Configuration

来源：https://stackoverflow.com/questions/35598595/how-to-customize-mappingmongoconverter-setmapkeydotreplacement-in-spring-boot

标签

spring-boot

spring-data

spring-data-mongodb