NullReferenceException when SetApplicationProject assembly is being specified in StoreOptions

[dalbarracin]

Hi @jeremydmiller

Following the documentation for pre-build generation code upfront in docs, a new issue is found when specifying the exact application assembly where the generated code is being placed beforehand.

System.NullReferenceException: Object reference not set to an instance of an object
at Marten.StoreOptions.SetApplicationProject(Assembly assembly, String hintPath)

The configuration is like bellow:

services.AddMarten(opts =>
            {
                opts.AutoCreateSchemaObjects = Weasel.Core.AutoCreate.CreateOrUpdate;
                opts.Connection(connectionString);
                opts.SetApplicationProject(typeof(SomeCustomDocument).Assembly); <---
                
                opts.GeneratedCodeMode = TypeLoadMode.Auto;

                opts.Advanced.HiloSequenceDefaults.MaxLo = 50;
                opts.CreateDatabasesForTenants(c =>
                    {
                        c.ForTenant().CheckAgainstPgDatabase()
                                     .WithOwner("postgres")
                                     .WithEncoding("UTF-8")
                                     .ConnectionLimit(-1);
                    });
                opts.Schema.Include<SomeCustomRegistry>();
            }),

Not sure how to debug this. I'm following the test example and without invoke the deprecated function.

[mysticmind]

@dalbarracin could you please share a more detailed stack trace?

[dalbarracin]

The stack trace is as before. I would also like to give you more detail @mysticmind but unfortunately I can't. My only guess is that function is only reachable in development environment, but when deploying a container for instance it brakes.

You would argue why I would like to specify another Assembly different to the application startup one, but it is basically because the generated code is in a shared library which needs to be referenced by other projects.

Am I misusing this? @jeremydmiller

[jeremydmiller]

@dalbarracin You can definitely make this easier by just putting the generated code into the root project, and that's what I would personally do. But, I'm still looking through that code today and trying to harden it against any possible problems with determining the path or the IHostEnvironment not existing.