Cannot add view in .Net Core RC2

Question

I am trying to add a scaffold mvc view in .Net Core RC2 but I get the error "There is no entity type ClientsOverviewViewModel on DbContext RNW.Data.ApplicationDbContext" .

With the view I want to display a list of Client. My Client class:

public class Client : Person
{
    #region Personal Data 
    public Nationality Nationality { get; set; }
    public Confession Confession { get; set; }
    public string SSN { get; set; }
    public MaritalStatus MaritalStatus { get; set; }
    #endregion
    ...
}

    public class Person
{
    public string Firstname { get; set; }
    public string Lastname { get; set; }
    public Sex Sex { get; set; }
    public DateTime Birthday { get; set; }
    public Address Birthplace { get; set; }
    public Address ResidentialAddress { get; set; }
    public string EMail { get; set; }
    public string PhoneNumber { get; set; }
}

In the list I want to display 5 properties, which I have put into my ViewModel:

public class ClientsOverviewViewModel
{
    [Display(Name = "Nachname")]
    public string LastName { get; set; }
    [Display(Name = "Vorname")]
    public string FirstName { get; set; }
    [Display(Name = "Geschlecht")]
    public Sex Sex { get; set; }
    [Display(Name = "Staatsbürgerschaft")]
    public string Nationality { get; set; }
    [Display(Name="Geburtsdatum")]
    public DateTime? DateOfBirth { get; set; }
}

Also here is my ApplicationDbContext Class:

    public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }
}

I also get the same error, if I try to use Client instead of the viewmodel.

Things I have tried so far:

• Create a different DbContext class, which derives from DbContext (assumption here was, that IdentityDbContext might have an issue)
• Add a property public DbSet<Client> Clients { get; set; } public DbSet<Client> Clients { get; set; }
• Add a property public DbSet<ClientsOverviewViewModel> Clients { get; set; } public DbSet<ClientsOverviewViewModel> Clients { get; set; } public DbSet<ClientsOverviewViewModel> Clients { get; set; } (which shouldn't be necessary but I thought I'll give it a try)
• Try different combination of template and model classes (besides Client and the viewmodel), without success

I haven't generated a DB yet, might that be an issue? I am also using entity framework core in the version 1.0.0-preview1-final

What I also have tried: I added a TempDbContext which derives from DbContext and just wanted to add the view with Model class Client and Data context class TempDbContext. Then I get the error "The item specified is not the element of a list"

Sadly I was not able to find any blog posts or stackoverflow questions regarding my problem.

Answer 1

Your ViewModel classes must have a key on it. A property named Id works fine.

Answer 2

The issue I had was EF does not support Generic List (List). Once I changed this I was able to use the scaffolding tools.