将ControllerBase操作纳入Mediatr命令中

Question

我正在将控制器中的API逻辑抽象为Mediatr命令和查询。我的POST和PUT端点通过标准.NET Core模型绑定验证进行了验证，但是我的PATCH端点的patchdoc需要检查控制器中模型的有效性。由于它是ControllerBase的一部分，因此我无法再访问该上下文。

你们都将如何建议您这样做？

补丁端点

        [HttpPatch("{valueToReplaceId}")]
        public IActionResult PartiallyUpdateValueToReplace(int valueToReplaceId, JsonPatchDocument<ValueToReplaceForUpdateDto> patchDoc)
        {
            var query = new UpdatePartialValueToReplaceCommand(valueToReplaceId, patchDoc);
            var result = _mediator.Send(query);

            switch (result.Result.ToUpper())
            {
                case "NOTFOUND":
                    return NotFound();
                case "NOCONTENT":
                    return NoContent();
                case "BADREQUEST":
                    return BadRequest();
                default:
                    return BadRequest();
            }
        }

UpdatePartialValueToReplaceCommand

public class UpdatePartialValueToReplaceCommand : IRequest<string>
    {
        public int ValueToReplaceId { get; set; }
        public JsonPatchDocument<ValueToReplaceForUpdateDto> PatchDoc { get; set; }

        public UpdatePartialValueToReplaceCommand(int valueToReplaceId, JsonPatchDocument<ValueToReplaceForUpdateDto> patchDoc)
        {
            ValueToReplaceId = valueToReplaceId;
            PatchDoc = patchDoc;
        }
    }

（（BROKEN）UpdatePartialValueToReplaceHandler

    public class UpdatePartialValueToReplaceHandler : IRequestHandler<UpdatePartialValueToReplaceCommand, string>
    {
        private readonly IValueToReplaceRepository _valueToReplaceRepository;
        private readonly IMapper _mapper;

        public UpdatePartialValueToReplaceHandler(IValueToReplaceRepository valueToReplaceRepository
            , IMapper mapper)
        {
            _valueToReplaceRepository = valueToReplaceRepository ??
                throw new ArgumentNullException(nameof(valueToReplaceRepository));
            _mapper = mapper ??
                throw new ArgumentNullException(nameof(mapper));
        }

        public async Task<string> Handle(UpdatePartialValueToReplaceCommand updatePartialValueToReplaceCommand, CancellationToken cancellationToken)
        {
            if (updatePartialValueToReplaceCommand.PatchDoc == null)
            {
                return "BadRequest";
            }

            var existingValueToReplace = _valueToReplaceRepository.GetValueToReplace(updatePartialValueToReplaceCommand.ValueToReplaceId);

            if (existingValueToReplace == null)
            {
                return "NotFound";
            }

            var valueToReplaceToPatch = _mapper.Map<ValueToReplaceForUpdateDto>(existingValueToReplace); // map the valueToReplace we got from the database to an updatable valueToReplace model
            updatePartialValueToReplaceCommand.PatchDoc.ApplyTo(valueToReplaceToPatch, ModelState); // apply patchdoc updates to the updatable valueToReplace -- THIS DOESN'T WORK IN A MEDIATR COMMAND BECAUSE I DON'T HAVE CONTROLLERBASE CONTEXT

            if (!TryValidateModel(valueToReplaceToPatch))
            {
                return ValidationProblem(ModelState);
            }

            _mapper.Map(valueToReplaceToPatch, existingValueToReplace); // apply updates from the updatable valueToReplace to the db entity so we can apply the updates to the database
            _valueToReplaceRepository.UpdateValueToReplace(existingValueToReplace); // apply business updates to data if needed

            _valueToReplaceRepository.Save(); // save changes in the database

            return "NoContent";
        }
    }

Answer 1

我遇到了相同的情况，并通过释放ModelState（更改的代码）解决了这个问题：

updatePartialValueToReplaceCommand.PatchDoc.ApplyTo(valueToReplaceToPatch); 

        //if (!TryValidateModel(valueToReplaceToPatch))
        //{
            //return ValidationProblem(ModelState);
        //}