SPRING REST controller - return image AND json values - spring

Question

I have built a rest web service, using SPRING and Hibernate.
I have 2 entities : Image and user, linked with a oneToOne annotation.
When I try to return the user details AND the image corresponding to this user, I get this error :
"org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation"
When I do it separately It works fine, but when I do it in one route, I get this error.
Here is my controller :
#CrossOrigin(
origins = "*",
methods = {RequestMethod.POST, RequestMethod.GET, RequestMethod.OPTIONS, RequestMethod.DELETE},
allowedHeaders = "*")
#RestController
#RequestMapping(path = "/user")
public class UserController {
#Autowired
UserRepository userRepository;
#Autowired
ImageRepository imageRepsository;
doesn't work--> #RequestMapping(value="/{userId}/getUserAndImage",method=RequestMethod.GET,produces = MediaType.IMAGE_JPEG_VALUE )
public Optional<User> getUserAndImage(#PathVariable Long userId) {
return userRepository.findById(userId);
}
works fine--> #RequestMapping(value="/{userId}/image", method=RequestMethod.GET, produces = MediaType.IMAGE_PNG_VALUE)
public byte[] getUserImage(#PathVariable Long userId) {
byte[] image = (imageRepsository.findImageWithUserId(userId)).getImage();
return image;
}
Here are entities :
User entity :
#Entity
#Table(name="users")
public class User {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
#NotNull
#Size(max=100)
#Column
private String nom;
#NotNull
#Size(max=250)
#Column
private String prenom;
#OneToOne(fetch=FetchType.EAGER,
cascade = CascadeType.PERSIST)
private Image image;
//getters and setters
}
Image entity :
#Entity
#Table(name="images")
public class Image {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#Column(name="image")
#Lob
private byte[] image;
#OneToOne(fetch = FetchType.EAGER)
#JoinColumn(name="user_id")
private User user;
//getters and setters
}

Answer 1

in the annotation, produce set as MediaType.IMAGE_JPEG_VALUE, then your code return response as User object. As result it throw that exception because spring expect your code to return JPEG type file only.
What can i suggest here,use produces = MediaType.APPLICATION_JSON_VALUE, and convert your image from byte[] to base64 string then return response as json object