Could not autowire. No beans of `Repository' type found

Question

I'm using Spring Data Jpa, this is my project structure:

App
  ConfigPackage
    MyConfig
  ServicePackage
    MyService
  RepositoryPackage
    MyRepository

Here is the MyRepository:

public interface MyRepository extends JpaRepository<MyEntity, Long> {
}

Here is the MyService:

@Service
public class MyService {

    @Autowired
    private MyRepository myRepository; <---here

    ...
}

Here is the MyConfig:

@Configuration
@EnableJpaRepositories(
        basePackages = "RepositoryPackage",
        entityManagerFactoryRef = "xxx",
        transactionManagerRef = "xxx"
)
public class MyConfig {
}

I use @Autowired to inject MyRepository to MyService, but IntelliJ always complains

Could not autowire. No beans of 'MyRepository' type found

even if the code can compile and run successfully.

Why can not IntelliJ recognize this is not an error? How to remove the warning of IntelliJ?

IntelliJ Version: 2018.2.6

Answer 1

Note this is for IntelliJ IDEA 2018.3.3 Ultimate Edition (But should work for other versions too)

I've noticed that this errors occurs (at least in my projects) when a configuration uses @ComponentScan and thus loads another class annotated with @Configuration. IntelliJ seems to not fully recognize it which leads to the error/warning:

1. Click in the file structure on the top folder
2. Press F4
3. Go to "Modules"
4. Select the module in which IntelliJ complains from the list
5. Click on "Spring"
6. Click on the plus icon
7. Select the configuration which provides your xRepository
8. Save

Answer 2

It is possible that Intellij has trouble with your package name in @EnableJpaRepositories annotation. Can you try putting that annotation in your main Spring class without any basePackages property defined?

@EnableJpaRepositories(entityManagerFactoryRef = "xxx", transactionManagerRef = "xxx")
@SpringBootApplication
public class FooApplication {

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

Your main Spring class should be in the root of course;

root
  ServicePackage
    MyService
  RepositoryPackage
    MyRepository
  FooApplication <---- main class here

Answer 3

Try it :

@Configuration
@ComponentScan(basePackages = {"your repository package}")

Answer 4

You can either declare:

@SuppressWarnings("SpringJavaAutowiringInspection")

On the field, or suppress the warning through Intellij's code inspection (click the red bulb and you can suppress 'Autowiring for Bean Class' either for the field or for the whole class.

Answer 5

On your database configuration you have to declare your base packages :

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
        entityManagerFactoryRef = "postgreEntityManager",
        transactionManagerRef = "postgreTransactionManager",
        basePackages = "fr.lab.test.dao"
)
public class PostGreDBConfig {

Answer 6

I had the same issue once, but just changing the project structure and move your MyRepository to the same package where you have the service.This should work. I don't know why it happens.