MVC3 Editing Model

Question

I have the following Model.

 public class Person
{
    public Guid ID { get; set; }

    [Required]
    [DataType(DataType.Text)]
    [Display(Name = "Prénom")]
    public string FirstName { get; set; }

    [Required]
    [DataType(DataType.Text)]
    [Display(Name = "Nom")]
    public string LastName { get; set; }

    [Required]
    [DataType("Users")]
    [Display(Name = "Adresse")]
    public Address Address { get; set; }

As you can see, it contains a public Field of Address Type:

    public class Address
{
    public Guid ID { get; set; }

    [Required]
    [DataType(DataType.Text)]
    [Display(Name = "Rue")]
    public string Street { get; set; }

    [Required]
    [DataType(DataType.Text)]
    [Display(Name = "Ville")]
    public string City { get; set; }

    [Required]
    [DataType(DataType.Text)]
    [Display(Name = "Province")]
    public string Province { get; set; }

I have no problem creating a new instance. Both the person and the address are posted into the database

 [HttpPost]
    public ActionResult Create(Person model)
    {
        if (ModelState.IsValid)
        {
            db.Persons.Add(model);
            db.SaveChanges();

I would like to understand why when I retrieve the Person from the db using the following commands, the Address is always NULL.

 return db.Persons.FirstOrDefault();

Thanks

Eranga · Accepted Answer · 2012-01-30 04:13:35Z

4

You need to eager load the address property.

return db.Persons.Include("Address").FirstOrDefault();

If you need lazy loading behavior you need to mark Address property as virtual

[Required]
[DataType("Users")]
[Display(Name = "Adresse")]
public virtual Address Address { get; set; }

answered Jan 30, 2012 at 4:13

Eranga

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1 Comment

Baral Over a year ago

Thanks a lot Eranga, I will try this out today.

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