In MongoDb @CreatedBy getting null with springBoot

Question

I am using spring annotations @CreatedBy for createdBy and @LastModifiedBy for updatedBy-

@CreatedBy
@Field(value = "createdBy")
private String createdBy;

@LastModifiedBy
@Field(value = "updatedBy")
private String updatedBy;

Also i have used @EnableMongoAuditing this annotation in the main application.

And created a class which implements AuditorAware like below-

@Component
public class UserAudtiting implements AuditorAware<String> {

    @Override
    public Optional<String> getCurrentAuditor() {

        String uname = SecurityContextHolder.getContext().getAuthentication().getName();
        return Optional.of(uname);
    }
}

So when i am using some post method to save data , I am getting "createdBy":null in response.

What should i do for this? Please help!

score 2 · Answer 1 · edited Oct 21 '19 at 22:43

2

As specified in the documentation,

First, note that only entities that have a @Version annotated field can be audited for creation (otherwise the framework will interpret a creation as an update).

Add @Version in your entity.

edited Oct 21 '19 at 22:43

Moshe perez

1,626
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answered Oct 21 '19 at 17:41

Madhu Tomy

662
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I struggled a lot but adding the version finally worked for me. When inserting version is 1 and after the first update version is 2. – mehdi mohammadi Nov 18 '20 at 23:22
BTW, that's a couchbase doc, not a mongo doc. – mvmn Oct 26 '22 at 21:03

Mebin Joe · Answer 2 · 2019-04-01T05:15:41.673

1

In order to enable auditing we need to add to Spring configuration. XML or JAVA Config, either way

Spring XML Configuraton

<mongo:auditing />

<mongo:mongo id="mongo" />

<bean class="org.springframework.data.mongodb.core.MongoTemplate">
    <constructor-arg name="mongo" ref="mongo" />
    <constructor-arg name="databaseName" value="blog-tests" />
</bean>

Spring Java Configuration

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.abc")
@EnableMongoRepositories(basePackages = "com.abc.xyz.repository")
@EnableMongoAuditing
public class MongoApplicationConfiguration {

    @Bean
    public MongoDbFactory mongoDbFactory() throws Exception {
        ServerAddress serverAddress = new ServerAddress("127.0.0.1", 27017);
        MongoCredential mongoCredential = MongoCredential.createCredential("user", "test", "samp".toCharArray());
        MongoClient mongoClient = new MongoClient(serverAddress, Arrays.asList(mongoCredential));
        return new SimpleMongoDbFactory(mongoClient, "test");
    }

    @Bean
    public MongoTemplate mongoTemplate() throws Exception {
        return new MongoTemplate(mongoDbFactory());
    }
}

In order to use @CreatedBy and @LastModifiedBy you need to tell Spring who is a current user.

First add user related fields to your audited class:

@CreatedBy
private String createdBy;

@LastModifiedBy
private String lastModifiedBy;

Then create your implementation of AuditorAware that will obtain current user (probably from session or Spring Security context – depends on your application):

public class UserAudtiting implements AuditorAware<String> {

    @Override
    public String getCurrentAuditor() {
      // get your user name here
      String uname = SecurityContextHolder.getContext().getAuthentication().getName();
      return Optional.of(uname);
    }
}

Last thing is to tell Spring Data MongoDB about this auditor aware class by little modification in Mongo configuration:

<mongo:auditing auditor-aware-ref="auditor" />
<bean id="auditor" class="app.demo.UserAudtiting "/>

More details here: https://www.javacodegeeks.com/2013/05/auditing-entities-in-spring-data-mongodb.html

edited Apr 01 '19 at 05:15

answered Mar 29 '19 at 06:45

Mebin Joe

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I am using spring maven project.So where should i add spring configuration? in pom.xml? – Sonal Mar 29 '19 at 09:53
@Sonal Which version of Spring are you using? You can do either way, using XML as mentioned above or Java way. Will Update the answer. Please give it a try and hope it works. Let me know in case if you face any issues. – Mebin Joe Apr 01 '19 at 05:17
I am using spring boot model version- 4.0.0 and version-2.1.1 release. And I am getting an error in pom.xml while using spring configuration as mentioned above. – Sonal Apr 01 '19 at 11:11
@Sonal Error in pom.xml? So you tried Spring Java config or Spring XML config ? – Mebin Joe Apr 01 '19 at 11:17
I tried it in Spring xml config still getting error.Can you please help me out regarding this ! – Sonal Apr 01 '19 at 11:27
@Sonal Just create a new java config class and copy-paste the above Spring Java Configuration described in the answer with your parameters. – Mebin Joe Apr 01 '19 at 11:29
I have already created mongo credentials.What should i do then? – Sonal Apr 01 '19 at 11:40
@Sonal. Then skip that part and autowire mongo like `@Autowired private Mongo mongo;` – Mebin Joe Apr 01 '19 at 11:44
Where should i pass mongo object? Because when i skip that line i am getting error below that line and goes on. – Sonal Apr 01 '19 at 12:20
@Sonal Let's make it minimal and simple. Add this in your newly created config class. `@Configuration @EnableMongoAuditing public class MongoApplicationConfiguration {}` – Mebin Joe Apr 01 '19 at 12:24
@Sonal What is the issue you facing. Please debug and ensure nothing is null or breaking. – Mebin Joe Apr 03 '19 at 06:47

In MongoDb @CreatedBy getting null with springBoot

2 Answers2