wlminimal

Drab: (KeyError) key :current_user not found in: %{}

Hi I am using drab to update chart js in a page
here is defhandler

  defhandler show_dashboard_stats(socket, sender) do
    order_id = sender.params["campaign_id"]
    user_id = socket.assigns.current_user_id
    order = Sales.get_order_by_id(order_id, user_id)
    message_status = Messenger.get_all_message_status(order_id)

    total_sent = Enum.count(message_status)
    deilvered_count = Analytics.get_delivered_message_status_count(message_status)
    undelivered_count = Analytics.get_undelivered_message_status_count(message_status)
    bitly = Bitly.get_bilty_by_order_id(order_id)
    total_clicks = Analytics.load_clicks(bitly)

    poke socket,
                total_sent: total_sent,
                deilvered_count: deilvered_count,
                undelivered_count: undelivered_count,
                total_clicks: total_clicks,
                recent_order: order
    socket |> exec_js!("DashboardChart.update()")
  end

and here is error message.

** (KeyError) key :current_user not found in: %{}
    (texting) lib/texting_web/templates/dashboard/dashboard/index.html.drab:164: TextingWeb.Dashboard.DashboardView."index.html"/1
    (phoenix) lib/phoenix/view.ex:332: Phoenix.View.render_to_iodata/3
    (phoenix) lib/phoenix/view.ex:339: Phoenix.View.render_to_string/3
    (drab) lib/drab/live.ex:662: Drab.Live.rerender_template/4
    (drab) lib/drab/live.ex:617: Drab.Live.process_poke/9
    (texting) lib/texting_web/commanders/dashboard/dashboard_commander.ex:17: TextingWeb.Dashboard.DashboardCommander.show_dashboard_stats/2
    (drab) lib/drab.ex:323: anonymous fn/7 in Drab.handle_event/6

And I don’t understand

** (KeyError) key :current_user not found in: %{}

in my app.html.eex I passed current_user id to drab like this

<%= Drab.Client.run(@conn, [current_user_id: @conn.assigns.current_user.id, order_id: @conn.assigns.recipients.id]) %>

So I inspected socket assigns in defhandler
then it shows correct user id.

So where does this error (KeyError) key :current_user not found in: %{} come from?

Almost same defhandler works in other page.
what is the possible cause?

Thanks

14 comments

/phoenix #drab

0 3539 14

2018-08-10 08:45:30 UTC

Marked As Solved

grych

Creator of Drab

So this is a conn case again.

Drab uses castrated version of conn, as it could be very heavy, especially when you keep a lot of data in assigns. See this issue for a reference. Drab creates it’s own version of conn, which by default copy only the few fields in private.

This behaviour is documented here. What you need is just to add something like :assigns => :current_user to :live_conn_pass_through config.

I know it is quite counter-intuitive, but I didn’t find any solution to change this, or at least tell user it is using the castrated conn version. Anyone?

Post #4

Also Liked

NobbZ

You are relying on an implementation detail of structs, can’t you use proper syntax support instead:

iex(1)> defmodule S do
...(1)>   defstruct a: 0
...(1)> end
iex(2)> %_{} = %S{}
%S{a: 0}
iex(3)> %_{} = %{}
** (MatchError) no match of right hand side value: %{}

Post #14