ASP.NET MVC: Automapper and Nhibernate

Question

Good night, I have a problem. I am using nhibernate to connect to my database and also use Automapper to map my Entities to my Viewmodel.

But when I select the entity I have several relationships and when I mapped to Viewmodel it turns out that all the child entities are being mapped:

public ActionResult Cadastro(int id){
    Briefing bf = _briefingAppService.Get(id);

    BriefingModel model = BriefingModel.GetModel(this);

    BriefingViewModel viewModel = BriefingViewModel.ToViewModel(bf);

    return View(viewModel);

My Mapping is like this:

Mapper.CreateMap<Briefing, BriefingViewModel>();

And that’s the result:

}

But I have multiple relationships in this class, and that amount is slowing my system down.

Does anyone know what I can do to make the Automapper not map all these records to my Viewmodel?

Answer 1

Examples:

There are two ways and it’s them:

1) First form

In these two People and Phone classes (1 person can have multiple phones),

public class People
{
    public People()
    {
        Phone = new HashSet<Phone>();
    }
    public People(int id, string name, DateTime? datenasc)
    {
        Id = id;
        Name = name;
        DateNasc = datenasc;
        Phone = new HashSet<Phone>();
    }
    public virtual int Id { get; set; }
    public virtual string Name { get; set; }
    public virtual DateTime? DateNasc { get; set; }
    public virtual ISet<Phone> Phone { get; set; }
}
public class Phone
{
    public Phone() { }
    public Phone(int id, string ddd, string number, People people)
    {
        Id = id;
        Ddd = ddd;
        Number = number;
        People = people;
    }
    public virtual int Id { get; set; }
    public virtual string Ddd { get; set; }
    public virtual string Number { get; set; }
    public virtual People People { get; set; }
}

I don’t want the Automapper bring the list of people’s phones and then my receiving class will be like this:

public class PeopleView
{
    public virtual int Id { get; set; }
    public virtual string Name { get; set; }
    public virtual DateTime? DateNasc { get; set; }
}

I mean, she doesn’t have the phone list and so the Automapper will only bring what I set in class PeopleView.

How to use:

AutoMapper.Mapper.CreateMap(typeof(People), typeof(PeopleView));
PeopleView peopleView = AutoMapper.Mapper.Map<PeopleView>(people);

//COLEÇÃO
List<People> Pessoas = con.ToList<People>();
AutoMapper.Mapper.CreateMap(typeof(People), typeof(PeopleView)); 
var peoplesview = AutoMapper.Mapper.Map<List<People>, List<PeopleView>>(Pessoas);

Threshing:

Data of a class

Data from a collection

2) Second form

You can also create a rule on Automapper talking to him ignore the list or lists, following the example of people class plus the change placed just below:

public class PeopleView
{
    public PeopleView()
    {
        Phone = new HashSet<Phone>();
    }
    public virtual int Id { get; set; }
    public virtual string Name { get; set; }
    public virtual DateTime? DateNasc { get; set; }
    public virtual ISet<Phone> Phone { get; set; }
}

Configuring the Automapper

AutoMapper.Mapper.CreateMap(typeof(People), typeof(PeopleView))
                .ForMember("Phone", x => x.Ignore());

Automatically it will ignore the phone list as demonstrated in the image below:

Demo

https://dotnetfiddle.net/99Zqlf

References:

• Ignore Mapping one Property with Automapper
• Automapper 4.0.4