无法通过将对象传递给 MediatR 查询

Question

我正在尝试使用 Mediator（使用 MediatR）查询模式。我需要传入我的用户对象。

这是我的查询：

public class GetAllInvoicesQuery : IRequest<IEnumerable<OrderDto>>
{
    public class GetAllInvoicesQueryHandler : IRequestHandler<GetAllInvoicesQuery, IEnumerable<OrderDto>>
    {
        private readonly IEntityContext _context;

        private readonly IMapper _mapper;

        public User User { get; set; }

        public GetAllInvoicesQueryHandler(IEntityContext context, IMapper mapper)
        {
            _context = context;
            _mapper = mapper;
        }

        public async Task<IEnumerable<OrderDto>> Handle(GetAllInvoicesQuery query, CancellationToken cancellationToken)
        {
            var invoices = await _context.Orders
                .Include(d => d.Details)
                .Include(r => r.ReservedDocument)
                .Include(b => b.Billto)
                .Include(s => s.Shipto)
                .OrderByDescending(d => d.Docdate)
                .Where(x => x.Soptype == OrderType.Invoice && x.Custnmbr == User.Custnmbr)
                .ProjectTo<OrderDto>(_mapper.ConfigurationProvider)
                .AsNoTracking()
                .ToListAsync(cancellationToken: cancellationToken);

            if (invoices.Count == 0)
                return null;

            return invoices.AsReadOnly();
        }
    }
}

这是我的控制器操作：

[HttpGet("GetAllInvoices")]
[Authorize]
[ProducesResponseType(StatusCodes.Status200OK)]
[ProducesResponseType(StatusCodes.Status400BadRequest)]
[ProducesDefaultResponseType]
public async Task<IActionResult> GetAllInvoicesAsync()
{
    HttpContext.Items.TryGetValue("User", out var user);

    if (user is null)
    {
        _logger.ForContext<UsersController>().Debug("User is null");
        return BadRequest(new { message = "Can't find user." });
    }

    return Ok(await Mediator.Send(new GetAllInvoicesQuery { User = (User)user } ));
                                                            ^^^^
}

Visual Studio 抱怨我的 User，它在控制器操作的 return 行中说它“无法解析符号用户”。任何帮助将不胜感激。

Answer 1

您的 User 属性需要在 GetAllInvoicesQuery class 上，而不是 GetAllInvoicesQueryHandler class.

无法通过将对象传递给 MediatR 查询

Cannot get past passing an object to MediatR query

c#

mediator

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