CODEWITHSUNDEEP
c#automapper
Roman Pushkin
Roman Pushkin

Reputation: 6079

Automapper, complex property and inheritance

I'm trying to get AutoMapper work and really stuck with a simple task. I have a complex type defined in User entity:

[ComplexType]
public class CustomerProfile
{
    public string       FirstName                { get; set; }
    public string       LastName                 { get; set; }
    // ...
}

public class User
{
    public long Id {get; set;}
    public string Email { get; get; }
    public CustomerProfile CustomerProfile { get; set; }
}

And I have view model like that:

public class CustomerViewModel : CustomerProfile
{
    public string Email { get; set; }
}

So I just have all of the CustomerProfile properties in view model plus Email.

I want to map User to CustomerViewModel. I tried everything but didn't succeed actually. Even this code doesn't work:

Mapper.CreateMap<CustomerProfile, CustomerViewModel>();

Automapper just refuses to map anything.

How it could be mapped? Thanks.

Upvotes: 2

Views: 381

Answers (1)

Andrew Whitaker
Andrew Whitaker

Reputation: 126042

You can use .ConstructUsing to create a CustomerViewModel from a User instance. Then the remaining properties (e.g., Email) will be mapped automatically by AutoMapper as long as the names match:

Mapper.CreateMap<CustomerProfile, CustomerViewModel>();

Mapper.CreateMap<User, CustomerViewModel>()
    .ConstructUsing(src => Mapper.Map<CustomerViewModel>(src.CustomerProfile));

Example: https://dotnetfiddle.net/RzpD4z

Update

To make AssertConfigurationIsValid() pass, you need to ignore the properties that you've mapped manually. You also need to ignore the Email property on CustomerViewModel from the CustomerProfile → CustomerViewModel mapping, since that will be taken care of by the User → CustomerViewModel mapping:

Mapper.CreateMap<CustomerProfile, CustomerViewModel>()
    // Ignore Email since it's mapped by the User to CustomerViewModel mapping.
    .ForMember(dest => dest.Email, opt => opt.Ignore());

Mapper.CreateMap<User, CustomerViewModel>()
    .ConstructUsing(src => Mapper.Map<CustomerViewModel>(src.CustomerProfile))
    // Ignore FirstName/LastName since they're mapped above using ConstructUsing.
    .ForMember(dest => dest.FirstName, opt => opt.Ignore())
    .ForMember(dest => dest.LastName, opt => opt.Ignore());

Updated example: https://dotnetfiddle.net/KitDiC

Upvotes: 2

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