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re: Clean Architecture Essentials VIEW POST

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Hi Ivan, Thanks for share.

What about if we need to obtain all registers from a entity (GetAllEntityXBySomeProperty) to load a DropDownList ? We need to create a UseCase for it, right? Or we just call to the EntityXRepository (GetAllEntityXBySomeProperty method) from the UI ...
Let me shared a personal code:

public class GetAllPropertyTypesByPropertyAgencyUseCase : 
     IGetAllPropertyTypesByPropertyAgencyUseCase
        {
          private readonly IPropertyTypeRepository _propertyTypeRepository;

          public GetAllPropertyTypesByPropertyAgencyUseCase(IPropertyTypeRepository 
          propertyTypeRepository)
          {
             _propertyTypeRepository = propertyTypeRepository;
          } 

           public void Execute(GetAllPropertyTypesByPropertyAgencyUseCaseRequest useCaseRequest, 
           IOutputPort<GetAllPropertyTypesByPropertyAgencyUseCaseResponse> outputPort)
            {
              IEnumerable<PropertyType> propertyTypes = 
              _propertyTypeRepository.GetAllByPropertyAgency(useCaseRequest.PropertyAgency);

               if (propertyTypes == default(IEnumerable<PropertyType>))
                 {
                  outputPort.HandleError(new List<UseCaseError> { new UseCaseError(1, $" 
                  {nameof(_propertyTypeRepository.GetAllByPropertyAgency)} Not Found") });
                  }

                 var getAllByPropertyAgencyPropertyTypeUseCaseResponse = new 
                GetAllPropertyTypesByPropertyAgencyUseCaseResponse(propertyTypes);

                 outputPort.HandleSuccess(getAllByPropertyAgencyPropertyTypeUseCaseResponse);
     }
} 
 

Hey Darian,

Yes, for each interaction you need to create an use case. I implemented an use case similar to yours on Manga Project github.com/ivanpaulovich/clean-arc.... Checkout the branch "React" for the most up to date code.

BTW your use case implementation is missing a return after outputPort.HandleError. Let me know if you have more questions :)

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