Can expression in WhenMatched use both existing record and an "insert" dataset?

Hi again Artiom,

I want to add just a little bit sophisticated logic in updating existing record. My expression in WhenMatched compares existing value with a new one and makes a decision:

dataContext.CompanyUsers
                    .Upsert(new CompanyUser(companyDto.Id, userDto.Id, userDto.Position))
                    .On(u => new {u.UserId, u.CompanyId})
                    .WhenMatched(inDb =>
                    new CompanyUser
                    {
                        Positions = inDb.Positions.Contains(userDto.Position) ? inDb.Positions : userDto.Position
                    })
                    .Run();

But this fails with UnsupportedExpressionException.

The following variation of the same fails too:

dataContext.CompanyUsers
                    .Upsert(new CompanyUser(companyDto.Id, userDto.Id, userDto.Position))
                    .On(u => new {u.UserId, u.CompanyId})
                    .WhenMatched((inDb, newOne) =>
                    new CompanyUser
                    {
                        Positions = inDb.Positions.Contains(newOne.Positions) ? inDb.Positions : newOne.Positions
                    })
                    .Run();

Out of curiosity I played a bit with it. But even some simple operations like Positions = inDb.Positions + ','+ userDto.Position fail. Is there any work-around for this? Thank you!

[dmitriifilonenko]

Hi Artiom,

Thanks a lot for your efforts! I will do my best to try this ASAP. Though can’t really promise since I’m quite loaded currently with other stuff. But it’s itching to try! 😄

[artiomchi]

I’ll be closing this issue since there’s been no updates in some time. If you have any other issues, please let me know