I have a problem with my DbContext being disposed when used in my CustomRoleProvider
.
I've setup my bindings like to:
kernel.Bind<IUnitOfWork>().To<UnitOfWork>().InRequestScope();
kernel.Bind(typeof(IGenericRepository<>)).To(typeof(GenericRepository<>)).InRequestScope();
kernel.Bind<MyContext>().ToSelf().InRequestScope();
I'm using this NuGet package Ninject.MVC5 v3.2.1.0 so Ninject is set as the primary DependencyResolver in MVC. Hence why I'm able to do this DependencyResolver.Current.GetService<IGenericRepository<User>>()
.
But for some reason the context is disposed.
I tried adding this binding to my setup:
kernel.Bind<MyContext>().ToSelf().WhenInjectedInto<RoleProvider>();
But that doesn't work either. I also tried injecting via property injection
[Inject]
public IGenericRepository<User> UserRepository { get; set; };
But that just results in a lot of others problems I wasn't able to solve (yet).
As far as I can tell from the error message it's here the is problem triggered from.
public abstract class BaseController : Controller
{
protected override void OnActionExecuting(ActionExecutingContext filterContext)
{
User.IsInRole("Admin"); // calls my CustomRoleProvider
base.OnActionExecuting(filterContext);
}
}
CustomRoleProvider
implementation
public class CustomRoleProvider : RoleProvider
{
private readonly IGenericRepository<User> _userRepository;
public CustomRoleProvider()
{
// using Service Locator (anti pattern)
// cause MVC do not support DI in role providers (yet)
_userRepository = DependencyResolver.Current.GetService<IGenericRepository<User>>();
}
public override bool IsUserInRole(string username, string roleName)
{
var user = _userRepository.AsQueryable().Where(x => x.Username == username && x.Role.Name == roleName); // dbcontext is here disposed...
return user.Any();
}
public override string[] GetRolesForUser(string username)
{
var user = _userRepository.AsQueryable().Where(x => x.Username == username).Select(x => x.Role.Name); // dbcontext is here disposed...
return user.ToArray();
}
// omitted...
}
IGenericRepository<T>
implementation
public class GenericRepository<T> : IGenericRepository<T>
where T : class
{
private readonly MyContext _context;
private readonly DbSet<T> _dbSet;
public GenericRepository(MyContext context)
{
_context = context;
_dbSet = context.Set<T>();
}
public IQueryable<T> AsQueryable()
{
return _dbSet.AsQueryable();
}
}
Error message
[InvalidOperationException: The operation cannot be completed because the DbContext has been disposed.]
System.Data.Entity.Internal.InternalContext.CheckContextNotDisposed() +34
System.Data.Entity.Internal.LazyInternalContext.InitializeContext() +30
System.Data.Entity.Internal.InternalContext.Initialize() +21
System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +20
System.Data.Entity.Internal.Linq.InternalSet`1.Initialize() +79
System.Data.Entity.Internal.Linq.InternalSet`1.get_InternalContext() +21
System.Data.Entity.Infrastructure.DbQuery`1.System.Linq.IQueryable.get_Provider() +64
System.Linq.Queryable.Where(IQueryable`1 source, Expression`1 predicate) +81
Presentation.Web.Providers.CustomRoleProvider.GetRolesForUser(String username) in ~\Application\Presentation.Web\Providers\CustomRoleProvider.cs:38
System.Web.Security.RolePrincipal.IsInRole(String role) +183
Presentation.Web.Controllers.BaseController.OnActionExecuting(ActionExecutingContext filterContext) in ~\Application\Presentation.Web\Controllers\BaseController.cs:27
...
So apparently the life cycle of RoleProvider is the entire lifespan of the MVC application. (can't remember where I read it)
So have to resolve the dependency in each method :(
public class CustomRoleProvider : RoleProvider
{
public override bool IsUserInRole(string username, string roleName)
{
var userRepository = DependencyResolver.Current.GetService<IGenericRepository<User>>();
var user = userRepository .AsQueryable().Where(x => x.Username == username && x.Role.Name == roleName); // dbcontext is here disposed...
return user.Any();
}
public override string[] GetRolesForUser(string username)
{
var userRepository = DependencyResolver.Current.GetService<IGenericRepository<User>>();
var user = userRepository .AsQueryable().Where(x => x.Username == username).Select(x => x.Role.Name); // dbcontext is here disposed...
return user.ToArray();
}
// omitted...
}
Don't understand why this didn't work then
kernel.Bind<MyContext>().ToSelf().WhenInjectedInto<RoleProvider>();
I even tried adding InSingletonScope
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