Guardian 1.0 - ** (RuntimeError) `error_handler` not set in Guardian pipeline

[bdensmore]

Hi!

I'm trying to implement Guardian into an API I'm working on and whenever I make a call to an endpoint I'm getting the error ** (RuntimeError) error_handler not set in Guardian pipeline.

I'm only trying to hit the /sign_up route right now for testing this out. My router is set up like so:

defmodule MyAppWeb.Router do
  use MyAppWeb, :router

  pipeline :api do
    plug :accepts, ["json"]
    plug Guardian.Plug.VerifyHeader
    plug Guardian.Plug.LoadResource
  end

  pipeline :authenticated do
    plug Guardian.Plug.EnsureAuthenticated
  end

  scope "/api", MyAppWeb do
    pipe_through :api
    post "/sign_in", SessionController, :sign_in
    post "/sign_up", RegistrationController, :sign_up

    pipe_through :authenticated
     resources "/users", UserController, except: [:new, :edit]
     resources "/availabilities", AvailabilityController, except: [:new, :edit]
     resources "/leads", LeadController, except: [:edit, :new]
     resources "/clients", ClientController, except: [:edit, :new]
  end

end

My RegistrationController looks like:

defmodule MyAppWeb.RegistrationController do
  use MyAppWeb, :controller

  alias MyApp.Auth
  alias MyApp.Auth.User

  action_fallback MyApp.FallbackController

  def sign_up(conn, %{"user" => user_params}) do
    with {:ok, %User{} = user} <- Auth.create_user(user_params) do
      conn
      |> put_status(:created)
      |> put_resp_header("location", user_path(conn, :show, user))
      |> render("success.json", user: user)
    end
  end
end

Is there somewhere I should be defining an error_handler for Guardian to use? In the router I did try doing:

plug Guardian.Plug.LoadResource, error_handler: MyAppWeb.ErrorHandlerView but that leads to a different error saying ErrorHandlerView is private.

Any help would be greatly appreciated.

Thank you, Ben

[ghost]

Did you define a guardian pipeline and configure it correctly in the config? You can find an example for an API with Guardian on my github account or additional infos in the documentation.

[hassox]

There's a bit more information in the guides. We haven't pushed the release so it's not available on hex yet but you can access it on github: https://github.com/ueberauth/guardian/blob/master/guides/plug/pipelines.md

[bdensmore]

@hlhr Thanks for the link to the example, that was extremely beneficial for me. I was still setting things up pre 1.0 which caused the issues I was having. Using your example app helped me to get things working.

@hassox Thank you for the added info in the guide as well.

Thank you both!

Ben