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Can't create strongly typed Controller in MVC

Posted on 2014-02-05
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Last Modified: 2014-02-23
I a new to MVC and am trying to create a Controller based on a model that I defined in a class.  I am using EF and have a model based on a SQL Server database.  I need to get data from an ORACLE database and combine it with the data from the SQL Server database.  I can't do this using a View so I have a class that defines the fields I need from the ORACLE database.  When I try and create a controller based on my model I am getting the following error:

Unable to retrieve Metadata for 'ENL.Models.EmployeeExtract'.  One or more validation errors were detected during model generation:

- System.Data.Entity.EdmEntityType: EntityType 'EmployeeExtract' has no key defined.  Define the key for this EntityTYpe.
- System.Data.Entity.Edm.EdmEntitySet: EntityTYpe: ENtitySet 'Employees' is based on type 'EmployeeExtract' that has no keys defined.

Here is my code:
using System.Web;
using System.Data;
using IntranetSupportTeam_i21Login;
using EmployeeProfileDatabase;
using System.Data.Entity;

namespace ENL.Models
{
    public class EmployeeExtract
    {
        public int profileID { get; set; }
        public string firstname { get; set; }
        public string lastname { get; set; }
        public int locationid { get; set; }
        public string emailaddress { get; set; }
        public string homephone { get; set; }
        public string mobilephone { get; set; }
        public string businessmobilephone { get; set; }
    }

    public class EmployeeExtractDbContext : DbContext
    {
        public DbSet<EmployeeExtract> Employees { get; set; }
    }
}

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Any help is greatly appreciated!
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Comment
Question by:dyarosh
  • 2
4 Comments
 
LVL 29

Accepted Solution

by:
Paul Jackson earned 500 total points
ID: 39838647
you need to define the key in the model, if it can't be easily determined which is the key of the model :

using System.Web;
using System.Data;
using IntranetSupportTeam_i21Login;
using EmployeeProfileDatabase;
using System.Data.Entity;

namespace ENL.Models
{
    public class EmployeeExtract
    {
        [Key]
        public int profileID { get; set; }
        public string firstname { get; set; }
        public string lastname { get; set; }
        public int locationid { get; set; }
        public string emailaddress { get; set; }
        public string homephone { get; set; }
        public string mobilephone { get; set; }
        public string businessmobilephone { get; set; }
    }

    public class EmployeeExtractDbContext : DbContext
    {
        public DbSet<EmployeeExtract> Employees { get; set; }
    }
} 

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0
 
LVL 29

Expert Comment

by:Paul Jackson
ID: 39838658
The normal configuration of the key is classnameID, so in your case it would be EmployeeExtractID, or you can have just ID. In these cases you wouldn't have to specify the [Key] attribute.
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Author Comment

by:dyarosh
ID: 39838689
Thank you.
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