Exception when updating DateTime? Field

First off, awesome library!

I’m trying to set my UpdatedAt timestamp using the WhenMatched() call. Here is my code:

_context.Earnings.Upsert(new Earnings
{
    EmployeeId = employee.Id,
    ContributionGroupId = employee.CurrentEmploymentRecord.ContributionGroupId,
    JobPosition = employee.CurrentEmploymentRecord.JobPosition,
    PositionStatus = employee.CurrentEmploymentRecord.PositionStatus,
    PaymentReason = employee.CurrentEmploymentRecord.PaymentReason,
    ImportType = ImportType.MonthEnd,
    PostingDate = new DateTime(UploadEarnings.Year, UploadEarnings.Month, 1),
    GrossEarnings = earning.Amount.GetValueOrDefault(),
    CreatedAt = DateTime.Now,
})
.On(c => new { c.EmployeeId, c.ContributionGroupId, c.JobPosition, c.PositionStatus, c.PaymentReason, c.ImportType, c.PostingDate })
.WhenMatched(c => new Earnings
{
    UpdatedAt = DateTime.Now,
    GrossEarnings = earning.Amount.GetValueOrDefault()
})
.Run();

I receive the following exception when trying to set the UpdatedAt value:

The method or operation is not implemented.

If I omit UpdatedAt or try to set CreatedAt in WhenMatched() I do not get the exception. The only difference between the two is that CreatedAt is a DateTime type and UpdatedAt is DateTime?. Also, If I set UpdatedAt in the Upsert() call, I do not get the exception. I’m a newbie, so maybe I’m missing something?

[barrettg]

Sorry for the delay in my response… You are correct, it is an issue of of the property being nullable. If I declare a local variable of DateTime? updatedAt = DateTime.Now; and then use that value in WhenMatched() it works. I have also tested version 2.0.2 and the issue is fixed when using the code unmodified from above. Thanks!!!

[artiomchi]

Right, I believe I got this working in the latest version, which is being deployed now: v2.0.2

Please let me know if the parch works, and if we can close this issue 😃