Bad Request Error while trying to get pet for a specific owner

[firasrg]

The GET/api/owners/{id}/pets/{petId} endpoint seems to be returning an incorrect response or handling errors improperly. This issue was encountered while attempting to retrieve specific pet for a given owner.

cURL:

curl -X 'GET' \
  'http://localhost:9966/petclinic/api/owners/1/pets/1' \
  -H 'accept: application/json'

Response on Swagger-ui: Error: response status is 400

I tried to debug code and found out that it comes from OwnerRestController :

@RestController
@RequestMapping("/api")
public class OwnerRestController implements OwnersApi {

    // ...
    
    @PreAuthorize("hasRole(@roles.OWNER_ADMIN)")
    @Override
    public ResponseEntity<PetDto> getOwnersPet(Integer ownerId, Integer petId) {
        Owner owner = this.clinicService.findOwnerById(ownerId);
        Pet pet = this.clinicService.findPetById(petId);
        if (owner == null || pet == null) {
            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
        } else {
            if (!pet.getOwner().equals(owner)) {
                return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
            } else {
                return new ResponseEntity<>(petMapper.toPetDto(pet), HttpStatus.OK);
            }
        }
    }
}

The problem is here : if (!pet.getOwner().equals(owner)) {}: the equals() check returns false. Ive checked the entity Owner class and found out that it doesn't have equals and hashcode() (same for Pet entity class), which is not recommended !