Have Required Attribute apply to property in one view and not another?

Question

Say I have a class called Test and I have a Create and Edit view. Say this class is incredibly simple

public class Test
{
    [Required]
    public string str { get; set; }
}

Is it possible to remove the required attribute when a user is editing this object?

Answer 1

ViewModels are there for this. One for Create and one for Edit.

You should use a ViewModel for this, as you need View Specific Models here :

public class CreateTestViewModel
{
    [Required]
    public string str { get; set; }
}

and:

public class EditTestViewModel
{
    public string str { get; set; }
}

You might want to read about What is ViewModel in MVC and How to use ViewModel in MVC