Can't get dependency from container

Here is a demo repository https://gitlab.com/ittennull/bolero_di_issue/ First commit is the standard template as is, second commit adds an interface, registers it and tries to inject it:

type ISomething =
    abstract member Foo: unit -> unit
    
type Something() =
    interface ISomething with
        member _.Foo() = ()

type MyApp() =
    inherit ProgramComponent<Model, Message>()
    
    [<Inject>]
    member val Something = Unchecked.defaultof<ISomething> with get,set

let Main args =
        let builder = WebAssemblyHostBuilder.CreateDefault(args)
        builder.Services.AddSingleton<ISomething, Something>() |> ignore
        ...

I get " An unhandled exception was thrown by the application. System.InvalidOperationException: Cannot provide a value for property ‘Something’ on type ‘BoleroHostedApplication1.Client.Main+MyApp’. There is no registered service of type ‘BoleroHostedApplication1.Client.Main+ISomething’"

I tried the same thing with blazor wasm project in C# - worked fine

Any ideas?

[Tarmil]

The problem is indeed with prerendering. During prerendering, the client application’s main function isn’t called. Instead, the dependency injection is done using aspnetcore’s container. So any dependencies you need must also be injected in the server-side ConfigureServices.

If you don’t want prerendering, then you can do .AddBoleroHost(prerendering = false) in ConfigureServices. If you want it, then to avoid code duplication, you can write a function that injects everything you need and call it from both the client and the server: https://gitlab.com/Tarmil/bolero_di_issue/-/commit/22f0200b807a09ac56a81af80717518f8d8b44d0

[ittennull]

Oh, I didn’t know that thing about prerendering, I always thought it’s an optimization and didn’t care about it. Yes, it works now, thanks a lot!