Hi! I’m having an issue getting my auth plug to assign a current user so that my LiveView doesn’t load it twice.
defmodule MyAppWeb.Router do
use MyAppWeb, :router
pipeline :browser do
plug :accepts, ["html"]
plug :fetch_session
plug :fetch_live_flash
plug :put_root_layout, {MyAppWeb.LayoutView, :root}
plug :protect_from_forgery
plug :put_secure_browser_headers
end
pipeline :authenticated do
plug MyAppWeb.Plugs.Authenticated
end
scope "/", MyAppWeb do
pipe_through [:browser, :authenticated]
live "/", OverviewLive
end
end
defmodule MyAppWeb.Plugs.Authenticated do
@behaviour Plug
import Plug.Conn
alias MyApp.Accounts
def init(opts), do: opts
def call(conn, _) do
case get_session(conn) do
%{"user_id" => user_id} ->
with %User{} = user <- Accounts.get_user(user_id) do
conn
|> assign(:current_user, user)
|> put_session(:user_id, user.id)
else
_ ->
conn
|> clear_session()
|> Phoenix.Controller.redirect(to: "/sign-in")
|> halt()
end
_ ->
conn
|> clear_session()
|> Phoenix.Controller.redirect(to: "/sign-in")
|> halt()
end
end
end
defmodule MyAppWeb.OverviewLive do
use MyAppWeb.BaseLive
alias MyApp.Accounts
def mount(_params, %{"user_id" => user_id}, socket) do
socket = socket
|> assign_new(:current_user, fn ->
Accounts.get_user(user_id)
end) # Problem is here, this always runs the function instead of finding an existing current_user value
{:ok, socket}
end
end
What I expect is when I visit the OverviewLive route with a valid session, the user is loaded once in the Authenticated plug I have and then in OverviewLive the socket already has it and assign_new doesn’t have to do anything. Instead I can see on my console the current user being queried for twice, one for static mount and one for live mount. I also did some logging of the socket and assigns here and there to confirm that on the second mount the user just isn’t in the socket assigns like I believe it should.
Am I miss understanding anything? Thank you for any help.
