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I'm using Automapper and I have the following scenario: Class OrderModel has a property called 'ProductName' that isn't in the database. So when I try to do the mapping with:
Mapper.CreateMap<OrderModel, Orders>();
It generates an exception :
"The following 1 properties on Project.ViewModels.OrderModel are not mapped: 'ProductName'
I've read at AutoMapper's Wiki for Projections the opposite case (the extra attribute is on the destination, not in the source which is actually my case )
How can I avoid automapper to make the mapping of this property?
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So, the AutoMapper Ignore() method is used when you want to completely ignore the property in the mapping. The ignored property could be in either the source or the destination object.
Automapper is considerably faster when mapping a List<T> of objects on . NET Core (It's still slower on full . NET Framework).
Your configuration (e.g. Automapper Profiles) are singletons. That is, they are only ever loaded once when your project runs. This makes sense since your configurations will not change while the application is running.
The Null substitution allows us to supply an alternate value for a destination member if the source value is null. That means instead of mapping the null value from the source object, it will map from the value we supply.
From Jimmy Bogard: CreateMap<Foo, Bar>().ForMember(x => x.Blarg, opt => opt.Ignore());
It's in one of the comments at his blog.
UPDATE(from Jamie's comment Jan 4 '19 at 11:11:)
Ignore has been replaced with DoNotValidate in ForSourceMember: https://github.com/AutoMapper/AutoMapper/blob/master/docs/8.0-Upgrade-Guide.md
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