entity-framework-6

I'm using a data structure similar to this where type of animal is determined from a discriminator column in the table: public class Farm { public int Id { get; set; } public virtual ICollection<Pig> Pigs { get; set; } public virtual ICollection<Cow> Cows { get; set; } } public class Animal { public int Id { get; set; } public int FarmId? { get; set; } public virtual Farm Farm { get; set; } public string Name { get; set; } } public class Pig : Animal {} public class Cow : Animal {} Mapping: this.Map<Pig>(m => m.Requires("Type").HasValue((int) AnimalType.Pig)); this.Map<Cow>(m => m.Requires(

ASP.Net Core noob here...I am using an ASP.Net Core WebAPI core project using DNX451 with EF 6. I have a requirement to implement API Key auth in our service. To do this I have created middleware that gets information from the request and proceeds with authentication. It is SUPPOSED to go to the database, get the key to match, and then return and do the validation. Here is the middleware implemented to look at the context and get the APIKey AuthenticationHandler public class AuthorizationHandler { private readonly RequestDelegate _next; private IAuthenticationService _authenticationService;

I have a query that used to be a stored procedure and was converted to an EF query. It is timing out now. Using SQL Profiler, I can see the only difference in the SQL generated is the new behavior where EF turns entity.Property == value into (entity.Property = @value OR (@value IS NULL AND entity.Property IS NULL)) . I know I can turn this off for the entire context by setting UseCSharpNullComparisonBehavior = false , but I really only want to do it for this one query. Is that possible? Or, is there a way to write the EF query so it doesn't generate the SQL like this? You can set the

I am new to ASP.NET MVC, I am facing this exception, the connection string looks perfect but still, the exception is raised, appreciate if anyone give me why is happening. Thank you guys Model 1 namespace MVCTwice.Models { public class StudentContext : DbContext { public DbSet<Student> studs { get; set; } } } Model 2 namespace MVCTwice.Models { [Table("tblStudents")] public class Student { public int id { get; set; } public string name { get; set; } public string gender { get; set; } public string totalMarks { get; set; } } } Action method public ActionResult Index() { StudentContext

I am receiving following error The 'Instance' member of the Entity Framework provider type 'Npgsql.NpgsqlServices, Npgsql, Version=2.0.14.2, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7' did not return an object that inherits from 'System.Data.Entity.Core.Common.DbProviderServices'. Entity Framework providers must inherit from this class and the 'Instance' member must return the singleton instance of the provider. This may be because the provider does not support Entity Framework 6 or later; see http://go.microsoft.com/fwlink/?LinkId=260882 for more information. Can any one help me here is