[Mono-dev] EF fails with NotImplementedException

[Marek Safar]

Hi,

I was trying to run a simple EF app using Mono 3.0 on Mac OS X but I got
> this error:
>
>
Please fill a bug report. Our System.Data implementation which EF relies on
is not complete and there will be issues like yours where underlying code
is not implemented or buggy.

Thanks
Marek


> Unhandled Exception:
> System.NotImplementedException: The requested feature is not implemented.
>   at System.Data.Common.DbProviderFactories.GetFactory
> (System.Data.Common.DbConnection connection) [0x00000] in <filename
> unknown>:0
>   at System.Data.Entity.Core.Common.DbProviderServices.GetProviderFactory
> (System.Data.Common.DbConnection connection) [0x00000] in <filename
> unknown>:0
>   at
> System.Data.Entity.Utilities.DbConnectionExtensions.GetProviderInvariantName
> (System.Data.Common.DbConnection connection) [0x00000] in <filename
> unknown>:0
>   at System.Data.Entity.Internal.InternalConnection.get_ProviderName ()
> [0x00000] in <filename unknown>:0
>   at System.Data.Entity.Internal.LazyInternalContext.get_ProviderName ()
> [0x00000] in <filename unknown>:0
>   at System.Data.Entity.Internal.DefaultModelCacheKeyFactory.Create
> (System.Data.Entity.DbContext context) [0x00000] in <filename unknown>:0
>   at System.Data.Entity.Internal.LazyInternalContext.InitializeContext ()
> [0x00000] in <filename unknown>:0
>   at System.Data.Entity.Internal.InternalContext.Initialize () [0x00000]
> in <filename unknown>:0
>   at
> System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType
> (System.Type entityType) [0x00000] in <filename unknown>:0
>   at
> System.Data.Entity.Internal.Linq.InternalSet`1[EFTest.User].Initialize ()
> [0x00000] in <filename unknown>:0
>   at
> System.Data.Entity.Internal.Linq.InternalSet`1[EFTest.User].GetEnumerator
> () [0x00000] in <filename unknown>:0
>   at
> System.Data.Entity.Infrastructure.DbQuery`1[EFTest.User].System.Collections.Generic.IEnumerable<TResult>.GetEnumerator
> () [0x00000] in <filename unknown>:0
>   at EFTest.MainClass.Main (System.String[] args) [0x00018] in
> /Users/eddy/Projects/EFTest/EFTest/Main.cs:46
>
>
> The same code works fine with MS .NET.
>
>
> // Main.cs
> using System;
> using System.ComponentModel.DataAnnotations;
> using System.ComponentModel.DataAnnotations.Schema;
> using System.Data.Common;
> using System.Data.Entity;
> using System.Data.SqlClient;
> using System.Linq;
>
> namespace EFTest
> {
> [Table("user")]
>  class User
> {
> [Key]
>  [Column("user_id")]
> public string UserName { get; set; }
>
>  public string Password { get; set; }
>
> public string Email { get; set; }
>  public override string ToString ()
> {
>  return string.Format ("{0}, {1}, {2}", UserName, Password, Email);
> }
>  }
>
> class SampleEntities : DbContext
> {
>  public SampleEntities (DbConnection conn) : base(conn, true)
> {
> }
>  public DbSet<User> Users { get; set; }
> }
>
> class MainClass
> {
> public static void Main (string[] args)
>  {
> var em = new SampleEntities (new SqlConnection ("server=localhost;" +
>  "database=ef_demo;" +
> "uid=developer;" +
> "pwd=123456;"));
>
> foreach (var item in em.Users) {
> Console.WriteLine (item);
>  }
> }
> }
> }
>
> // ef_test.sql
> CREATE DATABASE ef_test;
> GO
>
> USE ef_test;
> GO
>
> CREATE TABLE [user] (
>   user_id varchar(20) NOT NULL,
>   password varchar(40) NOT NULL,
>   email varchar(250) NOT NULL,
>   PRIMARY KEY (user_id)
> );
> GO
>
> INSERT INTO [user] VALUES ('admin', '123456', 'admin at company.com'),
>   ('user', '123456', 'user at company.com'),
>   ('guest', '123456', 'guest at company.com');
> GO
>
>
> Thanks,
> --
> Eddy Zavaleta
>
>
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