How to access repository from IRouter - entity-framework-core

Question

I'm developing modular application and I'd like for entities from different modules to be able to register their own friendly url slugs.
app.UseMvc(routes =>
{
routes.Routes.Add(new SlugRouter(routes.DefaultHandler));
(...)
});
But following code throws Cannot access a disposed object. Object name: 'CommerceDbContext'. when trying to access slug from the repository.
public class SlugRouter : IRouter
{
private readonly IRouter _target;
public SlugRouter(IRouter target)
{
_target = target;
}
public async Task RouteAsync(RouteContext context)
{
var slugRepository = context.HttpContext.RequestServices.GetService<IRepository<SlugEntity>>();
// ERROR: Cannot access a disposed object. Object name: 'CommerceDbContext'
var urlSlug = await slugRepository.GetAllIncluding(x => x.EntityType).FirstOrDefaultAsync(x => x.Slug == context.HttpContext.Request.Path.Value);
(...)
}
It must be something simple I'm missing to be able to access the repository from router. Thanks for any help.

Answer 1

Begin a unit of work:
public async Task RouteAsync(RouteContext context)
{
var slugRepository = context.HttpContext.RequestServices.GetService<IRepository<SlugEntity>>();
var unitOfWorkManager = context.HttpContext.RequestServices.GetService<IUnitOfWorkManager>();
using (var uow = unitOfWorkManager.Begin())
{
var urlSlug = await slugRepository.GetAllIncluding(x => x.EntityType).FirstOrDefaultAsync(x => x.Slug == context.HttpContext.Request.Path.Value);
await uow.CompleteAsync();
}
}

Answer 2

Access IModel. You do not need dbContext for.
for entities from different modules to be able to register their own
friendly url slugs
I do it this way:
1) move OnModelCreating to static methiod
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
BuildModel(modelBuilder);
}
public static void BuildModel(ModelBuilder modelBuilder)
{
// ...
}
2) Create model where you need:
var conventionSet = new ConventionSet();
var modelBuilder = new ModelBuilder(conventionSet);
AdminkaDbContext.BuildModel(modelBuilder);
var mutableModel = modelBuilder.Model;
There is your meta (in mutableModel ). You can loop through entities (types of entities).