Ueberauth failed to assign %{ueberauth_auth: auth} structure for some reason

mythicalprogrammer

Hi guys, my code is failing the pattern match and I have no idea why? I think ueberauth is doing something funky. Following this tutorial.

[debug] Processing with AppWeb.AuthenticationController.identity_callback/2                                 [54/1956]
  Parameters: %{"user" => %{"email" => "reader@example.com", "password" => "[FILTERED]"}}
  Pipelines: [:api]
[info] Sent 400 in 62ms
[debug] ** (Phoenix.ActionClauseError) no function clause matching in AppWeb.AuthenticationController.identity_callback/2

Controller code:

 >>  7   def identity_callback(%{assigns: %{ueberauth_auth: auth}} = conn, _params) do
 >>  8     IO.inspect("does this work?")
 >>  9     #email = auth.uid
 >> 10     #password = auth.credentials.other.password
 >> 11     #handle_user_conn(Accounts.get_user_by_email_and_password(email, password), conn)
 >> 12   end

I use curl:

curl \
    -XPOST \
    -v \
    localhost:4000/api/auth/identity/callback \
    -H 'content-type: application/json' \
    -d '{"user": {"email": "reader@example.com", "password": "qweqweqwe"}}'

Thanks in advance

I’ve tested this function in iex -S mix and it works so I believe ueberauth is failing to assign the structure to my conn for some reason.

5 comments

/phoenix #troubleshooting #ueberauth

0 1689 5

2019-09-25 22:00:55 UTC

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NobbZ

Have you checked using a catch-all clause what is actually comming into your function? Thats usually the first thing to do when debugging match-errors:

def identity_callback(conn, params) do
  IO.inspect(conn, label: :conn)
  IO.inspect(params, label: :params)
end

Post #1

mythicalprogrammer

Thank you.

Got this message:

Request: POST /api/auth/identity/callback                                                                        [32/1957]
** (exit) an exception was raised:
    ** (RuntimeError) expected action/2 to return a Plug.Conn, all plugs must receive a connection (conn) and return a connection, got: %{"user" => %{"email" => "reader@example.com", "password" => "qweqweqwe"}}

It’s something to work on.

update:

I got it thank you so much.

My config file was missing the base_path:

35 config :ueberauth, Ueberauth,
36   base_path: "/api/auth",

Thank you again!

Post #2

aarkhipov

Hey, I had the same problem and adding base_path fixed it, but I don’t get why - as I understand this option isn’t required and it doesn’t even defied in the example repo. Do you have any idea why in our cases it was necessary to add the option?

Post #3

mythicalprogrammer

Do you have any idea why in our cases it was necessary to add the option?

Unfortunately I haven’t done this in a while. I also moved on in using the Pow library instead.

But I did a quick search.

https://github.com/ueberauth/ueberauth#customizing-paths

Apparently the default is /auth and I want my path to be /api/auth. I’m assuming the router is like this and that the ueberauth library is expecting to auth on the path /auth. This is what I’m guessing is what happening.

I should document my solution and why it happen in the future. Thank you for pointing this out.

Post #4

aarkhipov

Yeah, I came to the same conclusion - I checked out today, and if I change routes to be prefixed with /auth, everything works without defining base_path. My problem was that I didn’t notice that routes in the example repo are prefixed with /auth via scope and for my app I took only what was inside of the scope, without /auth.