Ignoring mapping source without using attribute

[joaooo]

Hello, i'm currently migrating from AutoMapper to Mapster but i'm having some issues with a few things and i was wondering if there wasn't a different way to solve this.

Consider this following example:

public class Product 
{
	public string Name { get; set; }
	public Model Model { get; set; }
	public int ModelId { get; set; }
}

public class Model 
{
	public int Id { get; set; }
	public string Name { get; set; }
}

public class ProductDTO 
{
	public string Name { get; set; }
	public Enums.Model Model { get; set; }
}

public enum Model 
{
	Iphone = 1,
	Samsung = 2
}

I want to map my ProductDTO.Model from Product.ModelId, in AutoMapper i used to do this:
.Map(d => d.Model, source => Enum.GetName(typeof(Enums.Model), source.ModelId))

but when i tried this in Mapster, i get the error "System.InvalidOperationException: Cannot convert immutable type, please consider using 'MapWith' method to create mapping", so i tried to change my code to use .MapWith and returned my DTO but still had the same error, then i realized the error was coming from trying to map my DB Model to the Enum itself and i added this attribute to my Model class: [AdaptIgnore(MemberSide.Source)] and it fixed the error.

I was wondering if there is a different way to accomplish this without having to change my DB Models since i have quite a few of them. I tried to look for workarrounds with .Ignore but i could only ignore the destination class and not the origin.

Thanks in advance!

[DocSvartz]

Hello @joaooo Do you want to map Enum to Class ?
enum Model -> class Model

[DocSvartz]

https://github.com/MapsterMapper/Mapster/wiki/Rule-based-member-mapping - None of these settings helped?

[joaooo]

Regarding the Ignore, none of those really helped, but i ended up implementing with [AdaptIgnore(MemberSide.Source)] which fixed the issue.
Regarding the .PreserveReference(true), you mentioned someone had the same issue? Do you have a link? I couldn't really find a lot of issues regarding mapster and circular dependencies. I did not use Mapster.Tool, i wrote my own DTOs. I have tried changing .PreserveReference(true) from the beginning to the end of the config but nothing really helped and i'm still stuck with a stackoverflow exception :/ Not sure if it helps mentioning but i'm trying to migrate from AutoMapper (which works with the circular dependencies)

Also, thanks a lot for all your replies!

[DocSvartz]

#571
.PreserveReference(true)

[joaooo]

Thank you! Their example still worked when they removed RequireExplicitMapping, which is odd since i'm not setting mine to true and i'm still getting stackoverflow (sadly i cannot provide my models but it's complex models with a lot of nested objects). I will try once again to play arround .MaxDepth and see if i can make it work, if not, i will just stick with AutoMapper for now.
Thank you so much for your help @DocSvartz :) I appreciate a lot!

[DocSvartz]

probably this
https://github.com/MapsterMapper/Mapster/wiki/Object-references

TypeAdapterConfig.GlobalSettings.Default
.AvoidInlineMapping(true);