需要一个无法找到的 Repository 类型的 bean

Question

I am setting up a new Spring project for some fun learning/tutorial at home and I seem to run into a fairly common issue but I have tried all possible solutions I found on here but with no luck. Basically what I have is as follows:

Controller class:

@RestController
@RequestMapping(value = "/shop")
public class ShopController {

    @Autowired
    ShopService shopService;

    @GetMapping(value = "/{id}")
    public @ResponseBody Shop getTestData(@PathVariable String id) {
        return shopService.getShopBasedOnId(id);
    }

}

Service class:

@Service
public class ShopService {

    @Autowired
    private ShopRepository shopRepository;

    public ShopService(ShopRepository shopRepository){
        this.shopRepository = shopRepository;
    }

    public Shop getShopBasedOnId(String id) {
        return shopRepository.findByShopId(id);
    }
}

Repository class:

@Repository
public interface ShopRepository extends PagingAndSortingRepository<Shop, String> {

        Shop findByShopId(String shopId);
}

Application class:

@SpringBootApplication
@EnableJpaRepositories("com.example.reservations.repository")
public class ReservationsApplication {

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

}

Last but not least my pom.xml with the dependencies:

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-couchbase</artifactId>
            <version>4.0.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>2.0.1.Final</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>5.2.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
            <version>2.3.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.1-api</artifactId>
            <version>1.0.2.Final</version>
        </dependency>

So the error code I am getting is as follows:

Description:

Parameter 0 of constructor in com.example.reservations.services.ShopService required a bean of type 'com.example.reservations.repository.ShopRepository' that could not be found.

The injection point has the following annotations:
    - @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean of type 'com.example.reservations.repository.ShopRepository' in your configuration.

My structure of folders is:

main
 |_java
    |_com.example.reservations
         |_controllers
              |_ShopController.java
         |_repository
              |_ShopRepository.java
         |_services
              |_ShopService.java
         |_ReservationsApplication.java

Answer 1

The problem could be @Autowired in ShopService

@Service

public class ShopService {

@Autowired
private ShopRepository shopRepository;

public ShopService(ShopRepository shopRepository){
    this.shopRepository = shopRepository;
}

public Shop getShopBasedOnId(String id) {
    return shopRepository.findByShopId(id);
}
 }` 

should be @Service public class ShopService {

private ShopRepository shopRepository;

public ShopService(ShopRepository shopRepository){
    this.shopRepository = shopRepository;
}

public Shop getShopBasedOnId(String id) {
    return shopRepository.findByShopId(id);
}
}

You can also add @Autowired just above the constructor but it is no longer required if there is only one constructor

Answer 2

Turns out I had to have a config file for couchbase repository. What I did was follow the following link and now it all compiles fine!

Answer 3

In my situation, I had spring boot with multiple modules. So I had to the below to make it work.

@SpringBootApplication (scanBasePackages={"gov.usda.fsa.fcao.flp.ola"})
@EnableJdbcRepositories(basePackages={"gov.usda.fsa.fcao.flp.ola"})
public class TestOLAApplication {

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

    }

}