Automapper creating new instance rather than map properties

Question

This is a long one.

So, I have a model and a viewmodel that I\'m updating from an AJAX request. Web API controller receives the viewmodel, which I then update the ex

Answer 1

In the meantime there exists an AutoMapper Extension for that particular problem:

cfg.AddCollectionMappers();
cfg.CreateMap().EqualityComparison((s, d) => s.ID == d.ID);

With AutoMapper.EF6/EFCore you can also auto generate all equality comparisons. Plaese see AutoMapper.Collection AutoMapper.EF6 or AutoMapper.Collection.EFCore