尝试使用 @Data 和 @Builder 映射嵌套对象时,mapStruct 抛出以下错误:“在目标类型中找不到属性“profile”的读取访问器。”
@Mapper(componentModel = "spring")
public interface AuthMapper {
// only for testing mapping is working
@Mapping(target = "profile.organization", source = "organization")
RequestCreateOktaUser toEntity(Integer organization);
// only for testing mapping is working
@Mapping(target = "profile.login", source = "request.profile.email")
RequestCreateOktaUser toEntity(RequestMobilePreRegisterLocation.User request);
// Throw error "No read accessor found for property "profile" in target type" at compile time
@Mapping(target = "profile.organization", source = "organization")
@Mapping(target = "profile.login", source = "request.profile.email")
RequestCreateOktaUser toEntity(RequestMobilePreRegisterLocation.User request, Integer organization);
}
为了简单起见,使用 Lombok 简化模型
@Data
@NoArgsConstructor
@AllArgsConstructor(access = AccessLevel.PRIVATE)
@Builder
public class RequestCreateOktaUser {
private Profile profile;
@Data
@NoArgsConstructor
@AllArgsConstructor(access = AccessLevel.PRIVATE)
@Builder
public static class Profile {
private String login;
private String email;
private Integer organization;
}
}
@Data
@NoArgsConstructor
@AllArgsConstructor(access = AccessLevel.PRIVATE)
@Builder
public class RequestMobilePreRegisterUser {
@Valid
private User user;
@Data
@NoArgsConstructor
@AllArgsConstructor(access = AccessLevel.PRIVATE)
@Builder
public static class User {
@Valid
private Profile profile;
@Data
@NoArgsConstructor
@AllArgsConstructor(access = AccessLevel.PRIVATE)
@Builder
public static class Profile {
@NotEmpty
@Email
private String email;
}
}
前两个映射按预期工作,但是当尝试组合这两个映射时,会在编译时抛出以下错误“在目标类型中找不到属性“配置文件”的读取访问器。”
如果有人能在这方面帮助我,我将非常感激。
非常感谢,
乔纳森。
解决方案:
@Mapper(componentModel = "spring", builder = @Builder(disableBuilder = true))
我们可以添加另一个映射器,而不是忽略构建器,例如
ProfileMapper
,然后在“父映射器”(例如UserMapper
)中,您可以使用这样的映射器注释
@Mapper(uses = {ProfileMapper.class})
interface UserMapper {
...
}
最好的办法是避免嵌套映射。 您可能有单独的嵌套映射方法。所以你可以有一个方法来首先转换嵌套类型。例如用户配置文件。 然后你可以使用
expression
让mapstruct知道它使用哪种方法进行嵌套映射(即使需要也不确定)
如果您还有其他内容要映射到配置文件(例如组织),而这些内容不属于嵌套源,则可以使用
@AfterMapping