MapStruct ignore automatically unmapped properties

java mapstruct
Santiago Perez Chavez picture Santiago Perez Chavez · Apr 22, 2016 · Viewed 27.6k times · Source

I am using MapStruct with big models (more than 50 fields) shared between different business use cases in my code. Depending on the entry point, some properties will be mapped and some not. When I build my project, I will always get the "WARNING: Unmapped target properties" message.

I have researched and seen that it is possible to tell the mapstruct to ignore the field by using the semantic 

@Mapping(target = "propName", ignore = true)

The problem is, given my objects with so many fields, it would take a lot of code to ignore each single property in each mapper class. I also do not want this Warning on my log. Is there any way to tell mapstruct to ignore what is not mapped, avoiding this message?

Answer

Gunnar picture Gunnar · Apr 25, 2016

You can set the "unmapped target policy" on the @Mapper level or via @MapperConfig to share a setting across several mappers:

@Mapper(unmappedTargetPolicy = ReportingPolicy.IGNORE)
public interface MyMapper {}

Related questions

Map custom method mapper to Mapstruct

I'm creating a poc for using Mapstruct in my future projects. Now I have one question how to map custom methods to a special target. For example I have following interface mapper: @Mapper public interface ItemMapper { static ItemMapper INSTANCE = Mappers.…

Read More
MapStruct requires Impl class

I have next classes: Mapper public interface DeviceTokensMapper { DeviceTokensMapper INSTANCE = Mappers.getMapper(DeviceTokensMapper.class); @Mappings({ @Mapping(source = "tokenName", target = "tokenName"), @Mapping(source = "userOsType", target = "osType"), }) DeviceTokensDTO toDeviceTokensDTO(DeviceTokens deviceTokens); } Entity: @Entity public class DeviceTokens { @Id @Column(name="token_name", nullable = …

Read More
Mapstruct: Ignore specific field only for collection mapping

I am using following mapper to map entities: public interface AssigmentFileMapper { AssigmentFileDTO assigmentFileToAssigmentFileDTO(AssigmentFile assigmentFile); AssigmentFile assigmentFileDTOToAssigmentFile(AssigmentFileDTO assigmentFileDTO); @Mapping(target = "data", ignore = true) List<AssigmentFileDTO> assigmentFilesToAssigmentFileDTOs(List<AssigmentFile> assigmentFiles); List<AssigmentFile> assigmentFileDTOsToAssigmentFiles(List&…

Read More