[Solved] Circular reference, broken link

[Lee]

I have come across the circular reference issue whilst trying to use Ajax databinding with the grid.  There is a blog discussing this issue, but the following link is broken  circular reference was detected blog  Can this be made available again please?

Many Thanks,
Lee.

[Dimo]

Hello Lee,

The blog post is available at the following URL:

http://blogs.telerik.com/aspnetmvcteam/posts/10-01-25/resolving_circular_references_when_binding_the_mvc_grid.aspx

Greetings,
Dimo
the Telerik team

[Radu]

Hi,

First, thanks for the link. It does clarify a few issues, but I'm in the following configuration:

MVC 3
Telerik 2011.1.315
and Entity Framework 4.1 in Code-First mode. 

Of the provided solutions; using Server-side binding is not an option; I have a pretty big project, so ViewModel definitely would be a last resort.

Can you please give an example of how the second solution ("Avoid generating reference properties") can be implemented for EF Code-First mode?

Many thanks!

[Rosen]

Hello Radu,

You may disable serialization of the navigation properties by disabling the ProxyCreation options of the DataContext. 

[GridAction]
public ActionResult _Select()
{
    var db = new Northwind();
    db.Configuration.ProxyCreationEnabled = false;
    return Json(new GridModel(db.Products));
}

where data context has following declaration:

public class Product
{
    public int ProductID { get; set; }
    public string ProductName { get; set; }
    public decimal? UnitPrice { get; set; }
    public int CategoryID { get; set; }

    public virtual Category Category { get; set; }
}

public class Category
{
    public int CategoryID { get; set; }
    public string CategoryName { get; set; }
    public string Description { get; set; }
}

public class Northwind : DbContext
{
    public DbSet<Category> Categories { get; set; }
    public DbSet<Product> Products { get; set; }
}

Regards,
Rosen
the Telerik team

[Lee]

Hi Dimo,

Thanks very much for the link.  After giving the users a quick demo they didn't want an editable grid after all so this resolved the issue as I no longer needed to have Ajax support.

Many Thanks again,
Lee.