Database.BeginTransaction() throwing on InMemory Repository

I have a working code for EF7 beta6 with the SQL CE 4.0 data-provider, which uses some transactions inside.

Now I want to unit-test these things. However, when I switch the context options to be in-memory, I get the following exception: “No service for type ‘Microsoft.Data.Entity.Storage.IRelationalConnection’ has been registered.” Stack: at Microsoft.Framework.DependencyInjection.ServiceProviderExtensions.GetRequiredService(IServiceProvider provider, Type serviceType) at Microsoft.Framework.DependencyInjection.ServiceProviderExtensions.GetRequiredService[T](IServiceProvider provider) at Microsoft.Data.Entity.Infrastructure.AccessorExtensions.GetService[TService](IAccessor`1 accessor) at Microsoft.Data.Entity.RelationalDatabaseFacadeExtensions.GetRelationalConnection(DatabaseFacade databaseFacade) at Microsoft.Data.Entity.RelationalDatabaseFacadeExtensions.BeginTransaction(DatabaseFacade databaseFacade)

Basically, the code to reproduce:

var options = new DbContextOptionsBuilder<BloggingContext>();
options.UseInMemoryDatabase(persist: true);
//  options.UseSqlCe(@"Data Source=Blogging.sdf"); --> works fine

using (var x = new BloggingContext(entityOptions))
{
    var tx = x.Database.BeginTransaction(); // Fails, when using InMemoryDatabase
    x.Blogs.Add(new Blog() {Url = "URL-" + (i*10)});
   ...
}

What am I doing wrong? Am I missing some context-options?

I would have thought, that these things work out of the box.

Cheers, Harald

[rowanmiller]

I think the exception message tells you everything you need to know 😄…

Warning as error exception for warning ‘InMemoryEventId.TransactionIgnoredWarning’: Transactions are not supported by the in-memory store. See http://go.microsoft.com/fwlink/?LinkId=800142. To suppress this Exception use the DbContextOptionsBuilder.ConfigureWarnings API. ConfigureWarnings can be used when overriding the DbContext.OnConfiguring method or using AddDbContext on the application service provider.

So here is what your configuration code would look like…

options
    .UseInMemoryDatabase()
    .ConfigureWarnings(w => w.Ignore(InMemoryEventId.TransactionIgnoredWarning))

[kimwandev]

@rowanmiller Thank you so much for pointing that out. I have tested it and it worked like a charm. I am going to my eye doctor after my shift and get a pair of glasses so that I can read the exceptions carefully next time 😄

Again, Thanks for your help!

Regards, Kimwan Ogot