Question

I have the following entity classes, which are mapped from virtually identical view model classes:

public class Node
{
    public IList<Node> Children { get; set; }
    public Node Parent { get; set; }
    public string Text { get; set; }
}

public class Tree
{
    public Node Root { get; set; }
}

Using the following view model structure

Tree 
    -> Root
        -> Children { node1, node2 }

Once the view model is mapped to the entity, the first child node, of the root node, is the root node and, as a result, I’m getting an infinite loop when I traverse the entity object structure.

Anybody have an idea why this is happening and how to resolve it?

Many thanks

Steve

Answer 1

Mapper.CreateMap<NodeViewModel, Node>()
    .ForMember(dto => dto.Children, 
               opt => opt.MapFrom(src => src.Children.Select(nodevm => Mapper.Map<NodeViewModel, Node>(nodevm)).ToList()))
    .ForMember(dto => dto.Parent,
               opt => opt.MapFrom(src => Mapper.Map<NodeViewModel, Node>(src.Parent)))
    .ForMember(dto => dto.Text,
               opt => opt.MapFrom(src => src.Text));

Something like that schould work as the AutoMapper Configuration.

PS: I did not try it by now, but as I use the AutoMapper very often I think it should work.