How to assign parent reference to a property in a child with AutoMapper
I'm trying to find a way of configuring AutoMapper to set a property in a destination object with a reference of its source parent object. The code below shows what I'm trying to achieve. I'm moving data into the Parent & Child instances from the data objects. The mapping works fine to create the List collection with correct data but I need to have a ForEach to assign the parent instance reference.
public class ParentChildMapper
{
public void MapData(ParentData parentData)
{
Mapper.CreateMap<ParentData, Parent>();
Mapper.CreateMap<ChildData, Child>();
//Populates both the Parent & List of Child objects:
var parent = Mapper.Map<ParentData, Parent>(parentData);
//Is there a way of doing this in AutoMapper?
foreach (var child in parent.Children)
{
child.Parent = parent;
}
//do other stuff with开发者_如何学运维 parent
}
}
public class Parent
{
public virtual string FamilyName { get; set; }
public virtual IList<Child> Children { get; set; }
}
public class Child
{
public virtual string FirstName { get; set; }
public virtual Parent Parent { get; set; }
}
public class ParentData
{
public string FamilyName { get; set; }
public List<Child> Children { get; set; }
}
public class ChildData
{
public string FirstName { get; set; }
}
Use AfterMap. Something like this:
Mapper.CreateMap<ParentData, Parent>()
.AfterMap((s,d) => {
foreach(var c in d.Children)
c.Parent = d;
});
Slightly less verbose
CreateMap<Source, Dest>()
.AfterMap((_, dest) => dest.Children.ForEach(x => x.Parent = dest))
AfterMap
Execute a custom function to the source and/or destination types after member mapping
For completeness, this sort of thing should not really be a concern of automapper, as it leads to overly abstracted side effects.
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