match columns have to be properties of the TEntity class

[mweel1]

Getting this error when trying to use the library

var p = new Product() { ProductName = request.ProductName, ProductDescription = request.ProductDescription };

        await _context.Product.Upsert(p)
            .On(w => w.Id == request.Id)
            .WhenMatched(w => p)
            .RunAsync(cancellationToken);

[vbessolitsyn]

Hi, you should use Entity properties instead of comparison in '.On' expression.
In your example it should be just: .On(w => w.Id).
Also expression in .WhenMatched should be like 'x => new YourEntity()', your line will throw error. But in your case you can just omit it.