mapstruct/mapstruct-users

Now, let's dissect that method from the dto service class:

return mapper.entityToOutputFilterChildren(entityService.saveEntity(mapper.updateEntityFromInput(input, entityService.getEntityReferenceById(id))));

mapper.entityToOutputFilterChildren() - This is supposed to convert the resulting saved entity class to an output object.
entityService.saveEntity() - This calls the entity service to save the entity with the object in the argument. The method used to save the entity is the built-in method in the JpaRepository interface.
(mapper.updateEntityFromInput(input, entityService.getEntityReferenceById(id)) - This is supposed to update an existing instance of the entity with the given ID.

Now, the code here should do:

1. Grab the entity with the given ID
2. Update the entity instance with the input object
3. Save the updated entity
4. Convert the resulting saved entity to an output object
5. Return that object

Problem is, I get the following error message:

2021-08-16 18:02:15.714 ERROR 27380 --- [nio-8081-exec-1] o.h.engine.jdbc.spi.SqlExceptionHelper   : Invalid column name 'true'.
2021-08-16 18:02:15.736 ERROR 27380 --- [nio-8081-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessResourceUsageException: could not execute statement; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not execute statement] with root cause

This happens on the save method (when the entity is supposed to be saved) and to be honest, there is no column with the name true in any of my entities.

If I change my dto service method and make it like this (basically not use MapStruct) everything works exactly as intended:

    public BuildingBlockOutputFilterChildrenDTO updateObject(Long id, BuildingBlockInputDTO input) {
        var x = entityService.getEntityReferenceById(id);
        x.setBuildingBlockType(input.getName());
        var y = entityService.saveEntity(x);
        return mapper.entityToOutputFilterChildren(y);
    }

The code that MapStruct generates is this one:

    @Override
    public BuildingBlockEntity updateEntityFromInput(BuildingBlockInputDTO input, BuildingBlockEntity entity) {
        if ( input == null ) {
            return null;
        }

        if ( input.getBuildingBlockId() != null ) {
            entity.setId( input.getBuildingBlockId() );
        }
        if ( input.getName() != null ) {
            entity.setBuildingBlockType( input.getName() );

        else {
            entity.setBuildingBlockType( "" );
        }
        if ( input.getTestStepList() != null ) {
            if ( entity.getTestStepList() == null ) {
                entity.setTestStepList( new ArrayList<TestStepEntity>() );
            }
            testStepMapper.updateEntityListFromInputList( input.getTestStepList(), entity.getTestStepList() );
        }
        else {
            entity.setTestStepList( null );
        }

        return entity;
    }

I don't see any issues with the code that MapStruct generated but I am clueless as to why I am getting that SQL statement error message. If I print the objects, this is what I get:

Input: BuildingBlockInputDTO(buildingBlockId=null, name=aaaaabbbwwwwqqq, testStepList=null) -> Has new name
Entity: BuildingBlockEntity{id=44, createdDate=2021-08-16T16:40:36.204929700+02:00[Europe/Berlin], updatedDate=2021-08-16T17:37:02.228008200+02:00[Europe/Berlin], active=true, buildingBlockType='aaaaabbbwwwwqqq', testStepList=null, testTemplate=null} -> Field buildingBlockType gets filled correctly with new name.

Now what am I doing wrong here? I am simply trying to make a PUT request to update the name of my object and also cover cases where I would like to update other fields, not just the name.

PS: I am using Spring Boot with JPA.