BryanJBryce

BryanJBryce

Ash Authentication – Generated UI and multiple auth Resources

I realize this is pushing the boundaries of tested space for this library, but I’ve got two Auth resources (Admin and User, one is global the other schema-based both with their own token tables) and I’m trying to figure out how to use the generate UI with them, but have them be separated. The default when you do that is this fun UI:

I tried this:

 scope "/admin", AppWeb do
    pipe_through :browser

    auth_routes AdminAuthController, App.Accounts.Admin,
      path: "/admin/auth",
      sign_in_path: "/admin/sign-in",
      register_path: nil,
      reset_path: "/admin/reset"
  end
  scope "/", AppWeb do
    pipe_through :browser

    # User authentication routes
    auth_routes AuthController, App.Accounts.User,
      path: "/auth",
      sign_in_path: "/sign-in",
      register_path: "/register",
      reset_path: "/reset"

No dice:

== Compilation error in file lib/app_web/router.ex ==
** (ArgumentError) AshAuthentication.Phoenix.StrategyRouter has already been forwarded to. A module can only be forwarded a single time
(phoenix 1.7.18) lib/phoenix/router/scope.ex:87: Phoenix.Router.Scope.register_forwards/3
(phoenix 1.7.18) lib/phoenix/router/scope.ex:58: Phoenix.Router.Scope.route/8
lib/app_web/router.ex:74: (module)

First 5 of 5 Posts Switch mode

zachdaniel

zachdaniel

Creator of Ash

:thinking: A module can only be forwarded to a single time??? This is news to me :cry:

Looking into it there are certain kinds of workarounds that could be done:

https://github.com/graphql-elixir/plug_graphql/issues/7

but honestly nothing I can think of that is something that you could apply yourself in this situation. I would first really like to understand why you can’t forward to the same plug multiple times from different routes??

BryanJBryce

BryanJBryce OP

Right?!

jimsynz

jimsynz

Ash Core Team

that is so goddamn weird.

zachdaniel

zachdaniel

Creator of Ash

I’ve pushed something up to main that you can try.

First define a plug that wraps AshAuthentication.Phoenix.StrategyRouter like so:

defmodule MyPlugThatShouldNotBeNecessary do
  defdelegate init(opts), to: AshAuthentication.Phoenix.StrategyRouter
  defdelegate call(conn, opts), to: AshAuthentication.Phoenix.StrategyRouter
end

then in your second call to auth_routes add strategy_router_plug: MyPlugThatShouldNotBeNecessary

This seems like a very strange limitation, but this should get you around it. If you wouldn’t mind, a PR with docs for this or an issue reminding us to add some docs around it would be great.

BryanJBryce

BryanJBryce OP

I’ll get that done :saluting_face:

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