流利的验证将CustomAsync更改为MustAsync

问题描述

有人可以帮我解决这个问题吗?我正在尝试将 CustomAsync更改为MustAsync ，但是我无法使事情正常进行.下面是我的自定义方法

Could some one please help me to resolved this? i'm trying to change CustomAsync to MustAsync, but i couldn't make things to work. Below is my custom method

RuleFor(o => o).MustAsync(o => {
            return  CheckIdNumberAlreadyExist(o)
          });

      private static async Task<ValidationFailure> CheckIdNumberAlreadyExist(SaveProxyCommand command)
      {
          if (command.Id > 0)
              return null;

          using (IDbConnection connection = new SqlConnection(ConnectionSettings.LicensingConnectionString))
          {
              var param = new DynamicParameters();
              param.Add("@idnumber", command.IdNumber);

              var vehicle = await connection.QueryFirstOrDefaultAsync<dynamic>("new_checkDuplicateProxyIdNumber", param, commandType: CommandType.StoredProcedure);

              return vehicle != null
                  ? new ValidationFailure("IdNumber", "Id Number Already Exist")
                  : null;
          }
       }

推荐答案

要使其与FluentValidation的最新版本一起使用，我必须使用以下代码.

To make it work with the latest version of the FluentValidation, I had to use the codes like below.

RuleFor(ws => ws).MustAsync((x, cancellation) => UserHasAccess(x)).WithMessage("User doesn't have access to perform this action");

请注意此处的lambda表达式 MustAsync((x，Cancellation)=> UserHasAccess(x))，否则我总是会报错，因为无法从'方法组转换到'Func< Worksheet，CancellationToken，Task< bool>>

Please notice the lambda expression here MustAsync((x, cancellation) => UserHasAccess(x)), without this I was always getting an error as cannot convert from 'method group' to 'Func<Worksheet, CancellationToken, Task<bool>>

下面是我的自定义 UserHasAccess 函数.

Below is my custom UserHasAccess function.

private async Task <bool> UserHasAccess(Worksheet worksheet) {
    var permissionObject = await _dataProviderService.GetItemAsync(worksheet.FileItemId);
    if (permissionObject is null) return false;
    if (EditAccess(permissionObject.Permission)) return true;
    return false;
}

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