找不到按名称限定的Mapstruct
找不到按名称限定的Mapstruct
提问于 2022-02-21 02:39:11
我有一个Post实体和一个Post，目前正在尝试将DTO映射到实体，但是它给了我一个Qualifier error. No method found annotated with @Named#value: [ getUserByUsername ]. --任何帮助都会非常感谢，这些是我当前的文件：
PostDTO：
@Getter
@Setter
public class PostDTO {
private String author;
@Size(max = 755)
private String content;
}员额实体：
@Entity
@Table(name = "POST")
@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
public class Post {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@NotNull
@ManyToOne(fetch = FetchType.EAGER, cascade= CascadeType.ALL)
@JoinColumn(name = "POSTS")
private User author;
@Column(name = "POSTED_AT", nullable = false)
private LocalDateTime dateTime;
@Size(max = 755)
@Column(name = "CONTENT", nullable = false, length = 755)
private String content;
}PostMapper：
@Mapper(componentModel = "spring", unmappedTargetPolicy = ReportingPolicy.IGNORE, uses = {MappingUtil.class, PostRepository.class})
public interface PostMapper {
// since the author attribute on postDTO is a String, we use mapstruct to find
// within our database the matching user to that username and return the user object
@Mapping(source = "author", target = "author", qualifiedByName = {"getUserByUsername"})
Post toEntity(PostDTO postDTO);
PostDTO toDTO(Post post);
}MappingUtils：
@Component
public class MappingUtil {
private final UserRepository userRepository;
MappingUtil(UserRepository userRepository) {
this.userRepository = userRepository;
}
@BeanMapping(qualifiedByName = "getUserByUsername")
public User getUserByUsername(String username){
return userRepository.findByUsername(username);
}
}因此，每当我运行构建时，映射程序都找不到@Named注释，getUserByUsername方法在MappingUtil类上使用，我尝试了几种方法，但似乎无法修复它
回答 3
Stack Overflow用户
回答已采纳
发布于 2022-03-01 20:31:57
注释@BeanMapping无助于您。使用@Name代替，错误就会消失。
@Named("getUserByUsername")
public User getUserByUsername(String username) {
return userRepository.findByUsername(username);
}此外，还需要一个映射来将用户转换为UserName in toDTO( post )，如下所示：
@Mapping(source = "author.userName", target = "author")
PostDTO toDTO(Post post);Stack Overflow用户
发布于 2022-02-21 13:00:27
@Mapper(componentModel = "spring", unmappedTargetPolicy = ReportingPolicy.IGNORE, uses = {MappingUtil.class, PostRepository.class})
public interface PostMapper {
// since the author attribute on postDTO is a String, we use mapstruct to find
// within our database the matching user to that username and return the user object
@Mapping(source = "author", target = "author", qualifiedByName = "getUserByUsername")
Post toEntity(PostDTO postDTO);
PostDTO toDTO(Post post);
}
@Component
public class MappingUtil {
private final UserRepository userRepository;
MappingUtil(UserRepository userRepository) {
this.userRepository = userRepository;
}
@Named("getUserByUsername")
public User getUserByUsername(String username){
return userRepository.findByUsername(username);
}
}请您尝试在您的方法上使用@Named注释吗？这将有助于map-struct找到映射字段所需的方法。
Stack Overflow用户
发布于 2022-02-23 09:06:31
包私有构造函数？尝试将public添加到构造函数中：
public MappingUtil(UserRepository userRepository) {
this.userRepository = userRepository;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/71200652
复制相关文章
相似问题
腾讯云开发者
