Ignore mapping one property with Automapper

Question

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?

Answer 1

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

Answer 2

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.