Question

I have a simple class called Applicant. I’m trying to add a template controller using the Entity Framework with Applicant as my model class, and a new data context.

Every time I try to create the controller, I get an error dialog that says “Unable to retrieve metadata for ‘MyNameSpace.Models.Applicant’. There was an error generating ‘ScaffoldingConnectionFactory’. Try rebuilding your project.”

Rebuilding does nothing.

Here is my model class:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations;

namespace MyNameSpace.Models
{
    public class Applicant
    {
        public int ApplicantId { get; set; }
        [Required]
        public string FirstName { get; set; }
        [Required]
        public string LastName { get; set; }
        public string MiddleInitial { get; set; }
        [Required]
        public string Phone { get; set; }
        [Required]
        public string EmailAddress { get; set; }
        [Required]
        [DataType(DataType.Date)]
        public string DateOfBirth { get; set; }
        public virtual Ethnicity Ethnicity { get; set; }
        public virtual Race Race { get; set; }
    }

    public class Ethnicity 
    {
        public int EthnicityId { get; set; }
        public string Type { get; set; }
    }
    public class Race 
    {
        public int RaceId { get; set; }
        public string Type { get; set; }
    }
}

I feel like I’ve missed a step but I can’t put my finger on it.

Answer 1

I had the same problem and had to fix it similarly.

My version of EF was incompatible with the new MVC tooling. After updating EntityFramework from NuGet, and making a few updates to outdated code, everything is working fine.