How to use mapstruct to automatically map Entity and Entity objects inside Entity to fields in Dto?-CodePudding

public class boardEntity {

     @Id
     private UUID boardId;
     private String content;
     private UserInfoEntity user;
}

and

public class UserInfoEntity {
    
     @Id
     private UUID userId;
     private String userName;
     private String userEmail;
     private String userPhone;
}

I want Result

public class ResponseDto {
     private UUID boardId;  // << BoardEntity Field
     private String content; // << BoardEntity Field
     private UUID userId;  // << BoardEntity in UserInfoEntity Field
     private String userName;  // << BoardEntity in UserInfoEntity Field
     ...
}

I am using mapstruct.

I have a UserEntity inside a BoardEntity. (join)

The DTO I want is to take out all the fields in each entity and create them.

Take out boardId and content from BoardEntity,

Get userId and userName from UserEntity in BoardEntity.

Create a DTO with these 4 fields, this is what I want.

It's not that I don't know how.

@Mapping(target = "userId", source = "user.userId")
@Mapping(target = "userName", source = "user.userName")
ResponseDto toDto (BoardEntity board);

I've currently implemented it this way and it works without problems. (Reproduced from memory, so it may be slightly different, but the method is the same.)

The problem is that I only wrote 2 @Mapping right now, but there are actually more fields to fill out.

And they're all doing manual mapping, so I think something's wrong.

Is there another way to get all objects inside Entity and map them to fields in Dto? (The field names are the same.)

CodePudding user response：

MapStruct offers a way to define mapping of unmapped target properties from a certain source.

e.g. in your example you would like to map the unmapped target properties userId and userName from the UserInfoEntity into the ResponseDto you can do that with a single @Mapping

@Mapping(target = ".", source ="user")
ResponseDto toDto(BoardEntity board);