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?
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
I'm perhaps a bit of a perfectionist; I don't really like the ForMember(..., x => x.Ignore()) syntax. It's a little thing, but it matters to me. I wrote this extension method to make it a bit nicer:
public static IMappingExpression<TSource, TDestination> Ignore<TSource, TDestination>(
this IMappingExpression<TSource, TDestination> map,
Expression<Func<TDestination, object>> selector)
{
map.ForMember(selector, config => config.Ignore());
return map;
}
It can be used like so:
Mapper.CreateMap<JsonRecord, DatabaseRecord>()
.Ignore(record => record.Field)
.Ignore(record => record.AnotherField)
.Ignore(record => record.Etc);
You could also rewrite it to work with params, but I don't like the look of a method with loads of lambdas.
You can do this:
conf.CreateMap<SourceType, DestinationType>()
.ForSourceMember(x => x.SourceProperty, y => y.Ignore());
Or, in latest version of Automapper, you simply want to tell Automapper to not validate the field
conf.CreateMap<SourceType, DestinationType>()
.ForSourceMember(x => x.SourceProperty, y => y.DoNotValidate());