NoSuchBeanDefinitionException : no qualifying bean of type - spring

Question

I get this error when call my GET request (modes-calcul) and I don't understand why... My dependency injection is correct?
org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.margaux.margaux.repository.ModeCalculDAO' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
ModeCalculController :
#Slf4j
#Transactional
#RestController
#RequestMapping("modes-calcul")
public class ModeCalculController {
private ModeCalculService modeCalculService;
#Autowired
public ModeCalculController(ModeCalculService modeCalculService) {
this.modeCalculService = modeCalculService;
}
#GetMapping()
public ResponseEntity<List<ModeCalculDTO>> getModesCalcul() {
return new ResponseEntity<List<ModeCalculDTO>>(modeCalculService.getModesCalcul(), HttpStatus.OK);
}
}
ModeCalculServiceImpl :
#Slf4j
#Service
#Transactional
public class ModeCalculServiceImpl implements ModeCalculService {
private ModeCalculDAO modeCalculDAO;
#Autowired
#Lazy
public ModeCalculImpl(ModeCalculDAO modeCalculDAO){
this.modeCalculDAO = modeCalculDAO;
}
#Override
public List<ModeCalculDTO> getModesCalcul() {
ModelMapper mapper = new ModelMapper();
List<ModeCalcul> modesCalcul = modeCalculDAO.findAll();
return modesCalcul
.stream()
.map(modeCalcul -> mapper.map(modeCalcul, ModeCalculDTO.class))
.collect(Collectors.toList());
}
}
ModeCalculDAO :
#Repository
public interface ModeCalculDAO extends JpaRepository<ModeCalcul, Long> {
}
Thanks for your help..

Answer 1

check whether the ModeCalculDAO is in sub package of main program
or if it is not a sub package try to add #ComponentScan(package name) in main program

Answer 2

When you run your application it scans all the files which are inside the sub package of the project main package in which your main class has defined using #SpringBootApplication. So put all the files inside the sub package of your main class that you want to scan or if your package is not a subpackage of your main package use #ComponentScan(your_package name) at your main class.

Answer 3

Make sure your MargauxApplication class to be inside com.margaux.margaux package.
Can you please share MargauxApplication class to check its import packages.

Answer 4

Here is the MargauxApplication class :
package com.margaux.margaux;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
#SpringBootApplication
public class MargauxApplication {
public static void main(String[] args) {
SpringApplication.run(MargauxApplication.class, args);
}
}
I tried to put #ComponentScan("com.margaux.margaux") or #ComponentScan(basePackages = "com.margaux.margaux")
in this class but it doesn't work.
My other classes have this :
package com.margaux.margaux.repository;
package com.margaux.margaux.service;
etc ...
in my pom I have this:
<!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-jpa -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>2.3.6.RELEASE</version>
</dependency>
if I put this, it works :
<!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-jpa -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
Why ?