Question

我一直在研究一个Spring Boot Web应用程序，我决定使用ReactiveMongoRepository来保存数据。但是当我保存文件时，我正在观察一个例外，即我在最近几天努力解决它，但没有运气。例外是：

reactor.core.Exceptions$ErrorCallbackNotImplemented: 
org.bson.codecs.configuration.CodecConfigurationException: Can't find a 
codec for class com.mongodb.DBRef. Caused by: 
org.bson.codecs.configuration.CodecConfigurationException: Can't find a 
codec for class com.mongodb.DBRef.
at 
org.bson.codecs.configuration.CodecCache.getOrThrow(CodecCache.java:46) 
~[bson-3.4.2.jar:na]

请参阅下面的我的代码类和属性文件：

的build.gradle：

dependencies {
  compile('org.springframework.boot:spring-boot-starter-data-mongodb-
reactive')
compile('org.springframework.boot:spring-boot-starter-webflux')
compile('org.springframework.security:spring-security-core')
compile('org.springframework.security:spring-security-config')
compile('org.springframework.security:spring-security-webflux')
compileOnly('org.projectlombok:lombok')
compile("org.apache.tomcat.embed:tomcat-embed-jasper")
testCompile('org.springframework.boot:spring-boot-starter-test')
testCompile('de.flapdoodle.embed:de.flapdoodle.embed.mongo')
testCompile('io.projectreactor:reactor-test')
}

application.properties

spring.data.mongodb.database=demo
spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017

Application.java

@SpringBootApplication
@EnableReactiveMongoRepositories
@EnableWebFluxSecurity
public class Application implements CommandLineRunner {

@Autowired
private PersonDetailsRespository personDetailsRespository;

@Autowired
private PersonRespository personRespository;


public static void main(String[] args) {
    SpringApplication.run(Application.class, args);
}

private void dataBuilder() {

        Person person = new Person();
        person.setAge(23);
        person.setName("Jitender");

        personRespository.save(person).subscribe();

        PersonDetails personDetails = new PersonDetails();

        personDetails.setAddress("Address");


        personDetails.setPerson(personRespository.findByName("Jitender").block());


        personDetailsRespository.save(personDetails).subscribe();

}
@Override
public void run(String... args) throws Exception {
    dataBuilder();
}
}

Person.java

@Document
@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
public class Person {
public Person(String id) {
    super();
    this.id = id;
}
@Id 
private String id;

private String name;
private int age;

}

PersonDetails.java

@Document
@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
public class PersonDetails {
@Id private String id;
private String Address;

@DBRef
private Person person;
}

PersonRespository.java

public interface PersonRespository extends ReactiveMongoRepository<Person, String> {
Mono<Person> findByName(String name);
}

PersonDetailsRespository.java

public interface PersonDetailsRespository extends ReactiveMongoRepository<PersonDetails, String> {    
}

在运行此应用程序时，上述异常发生，我可以看到它使用mongodb驱动程序版本mongodb-driver-core-3.4.2.jar。我注意到PersonDetails.java中Person类的@DBref有问题，如果我从Application中注释以下行，那么它可以工作

personDetails.setPerson(personRespository.findByName("Jitender").block());

提前致谢。 Jitender

保存文档时弹出启动Mongo Reactive Repository问题.ERROR：[找不到类com.mongodb.DBRef的编解码器]

0 个答案: