C#•9mo ago

Vertical Slice Architecture and adding IdentityDbContext<TUser>

https://github.com/elianora/VerticalSliceTodo/tree/feature/initial-server I'm following along with the vertical slice architecture template and I have a few questions about changing the AppDbContext : DbContext to be an AppDbContext : IdentityDbContext<MyUser>: - Where would the right place to put identity classes such as MyUser be? As a feature slice? - How can I handle the change messages that I'd normally inherit from BaseEntity on my MyUser class since MyUser has to inherit from IdentityUser? I don't want to mess up the logic in EventPublisher

27 Replies

ElianoraOP•9mo ago

(if there is an example of using this architecture with ASP.NET identity somewhere to look at that would be useful)

jcotton42•9mo ago

Identity stuff goes in your database right? so it goes in the Data layer (one of the few layers a VSA project will have)

ElianoraOP•9mo ago

Hmm in the sample they have Common/Domain/BaseEntity and Feature/Todos/Domain/Todo so I was under the impression you still vertically split the domain objects it makes sense that it would go in the data layer

jcotton42•9mo ago

they're db models, keep them together also, what template?

ElianoraOP•9mo ago

the one from this repository (dotnet new hona-vsa): https://github.com/Hona/VerticalSliceArchitecture

GitHub

GitHub - Hona/VerticalSliceArchitecture: A small but opinionated Ve...

A small but opinionated Vertical Slice Architecture solution template for .NET 8 & C# - Hona/VerticalSliceArchitecture

ElianoraOP•9mo ago

which is from this video: https://www.youtube.com/watch?v=T-EwN9UqRwE

dotnet

YouTube

Vertical Slice Architecture: How Does it Compare to Clean Architect...

Is Vertical Slice Architecture the next big thing or just as cool new kid? Enterprise software development requires you to choose the right architecture. This session with Luke Parker will provide a realistic dive into Vertical Slice Architecture (VSA) with .NET; showcasing the potential shift from Clean Architecture (CA) to VSA. You will lear...

jcotton42•9mo ago

oh hm I don't like how he's split up the dbcontext everywhere the splitting by technical concern within features is also kinda silly imo @viceroypenguin | 🦋🐧🌟 ping

ElianoraOP•9mo ago

So essentially you're saying you think the DB stuff should be a horizontal layer that exists across vertical slices

jcotton42•9mo ago

yes

jcotton42•9mo ago

https://codeopinion.com/restructuring-to-a-vertical-slice-architecture/

jcotton42•9mo ago

I like this image as a summary

ElianoraOP•9mo ago

good image OK I think I also don't understand the EventPublisher / MediatR well enough to wrap my brain around the right way to add ASP.NET identity with it? Like I'm sort of understanding what the code is doing but it seems weird to me that the domain object has this StagedEvents list property on it that isn't mapped to the DB

viceroypenguin•9mo ago

i'm not the biggest fan of it, and luke has a bit more formality than I prefer, but it's a pretty good template. yes, DB is a layer that supports every feature. any feature can access anything in the db it needs to. there's really no reason to restrict whether a feature can access a particular table or not. i'll be honest, i don't like MediatR. i avoid it like the plague. i like the concept of command dispatching, but using a central class for it is too much of a service-locator antipattern. @ɐɹouɐᴉʅƎ if you have any more specific questions about VSA or how to organize, let me know. not sure what you're looking for here.

ElianoraOP•9mo ago

I think I grasp VSA well enough, just not the technologies that the template used I'll try playing around with it some more to come up with more concrete questions

viceroypenguin•9mo ago

note that he is using immediate.handlers (which is my library), and he and i are talkign about how to migrate to immediate.apis (which is also my library) so if you have questions about [Handler], feel free to ask me anyway. 😄

ElianoraOP•9mo ago

Will do 🙂 My goal is to get ASP.NET identity stuff to work with my project right now and I was going to use the handler/endpoint pattern from the template for it I think I'm getting it now I updated the code to use Immediate.Apis and removed a ton of the boilerplate from that template and removed MediatR so now I have this folder structure:

ElianoraOP•9mo ago

viceroypenguin•9mo ago

yup. very close to what i have:

ElianoraOP•9mo ago

Now I just need to figure out how to actually do the auth stuff between the frontend and backend 😅 @🌟🐧🦋 | uınƃuǝdʎoɹǝɔıʌ quick question - how do I capture query params with Immediate.Api HttpPut endpoints? Is there something similar to [FromQuery] model binding for the record Command ?

viceroypenguin•9mo ago

so currently, the query parameter is done as [AsParameters], so each item inside of that is done as a parameter (i.e. it can come from query/route/body/etc., and can be marked with [FromRoute], etc.) i'm pondering... if adding [FromBody] on the object itself might make sense so that for an [HttpPost], you can make the whole thing a body and not have to make two objects (one for the query, and one for the [FromBody]

ElianoraOP•9mo ago

in my head I'd expect the API to look something like

[Handler]
[MapPost("/login/{redirectUri}")]
[AllowAnonymous]
public partial class LoginCommand
{
    public record Command(string Username, string Password, bool RememberMe);

    private static async ValueTask HandleAsync(
        [FromQuery]string redirectUri,
        [FromBody]Command command,
        SignInManager<AppUser> signInManager,
        CancellationToken _)
    {
        var result = await signInManager.PasswordSignInAsync(command.Username, command.Password, command.RememberMe, lockoutOnFailure: true);
    }
}

[Handler]
[MapPost("/login/{redirectUri}")]
[AllowAnonymous]
public partial class LoginCommand
{
    public record Command(string Username, string Password, bool RememberMe);

    private static async ValueTask HandleAsync(
        [FromQuery]string redirectUri,
        [FromBody]Command command,
        SignInManager<AppUser> signInManager,
        CancellationToken _)
    {
        var result = await signInManager.PasswordSignInAsync(command.Username, command.Password, command.RememberMe, lockoutOnFailure: true);
    }
}

viceroypenguin•9mo ago

problem is, that doesn't work well with the Immediate.Handlers interface because the expectation is that there's a single parameter to HandleAsync(), and everything else comes from DI

ElianoraOP•9mo ago

viceroypenguin•9mo ago

[Handler]
[MapPost("/login/{redirectUri}")]
[AllowAnonymous]
public partial class LoginCommand
{
    public record Command(
      [FromRoute] string RedirectUri,
      [FromBody] CommandValues CommandValues);

    public record CommandValues(string Username, string Password, bool RememberMe);

    private static async ValueTask HandleAsync(
        Command command,
        SignInManager<AppUser> signInManager,
        CancellationToken _)
    {
        var result = await signInManager.PasswordSignInAsync(command.Username, command.Password, command.RememberMe, lockoutOnFailure: true);
    }
}

[Handler]
[MapPost("/login/{redirectUri}")]
[AllowAnonymous]
public partial class LoginCommand
{
    public record Command(
      [FromRoute] string RedirectUri,
      [FromBody] CommandValues CommandValues);

    public record CommandValues(string Username, string Password, bool RememberMe);

    private static async ValueTask HandleAsync(
        Command command,
        SignInManager<AppUser> signInManager,
        CancellationToken _)
    {
        var result = await signInManager.PasswordSignInAsync(command.Username, command.Password, command.RememberMe, lockoutOnFailure: true);
    }
}

ElianoraOP•9mo ago

ah that makes more sense is that how it works now? or are you saying that's how you'd like it to work? if I'm reading this correct, this is how it works now

viceroypenguin•9mo ago

yes what i would like to add is possibly:

[Handler]
[MapPost("/login")]
[AllowAnonymous]
public partial class LoginCommand
{
    [FromBody]
    public record Command(string Username, string Password, bool RememberMe);

    private static async ValueTask HandleAsync(
        Command command,
        SignInManager<AppUser> signInManager,
        CancellationToken _)
    {
        var result = await signInManager.PasswordSignInAsync(command.Username, command.Password, command.RememberMe, lockoutOnFailure: true);
    }
}

[Handler]
[MapPost("/login")]
[AllowAnonymous]
public partial class LoginCommand
{
    [FromBody]
    public record Command(string Username, string Password, bool RememberMe);

    private static async ValueTask HandleAsync(
        Command command,
        SignInManager<AppUser> signInManager,
        CancellationToken _)
    {
        var result = await signInManager.PasswordSignInAsync(command.Username, command.Password, command.RememberMe, lockoutOnFailure: true);
    }
}

if you only need body values

ElianoraOP•9mo ago

that makes sense to me

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Vertical Slice Architecture and adding IdentityDbContext<TUser>