wolfiton

Programming phoenix Chapter 3. Controllers page 54

Hi everyone,

Problem in programming phoenix page 55

Error trace:

[info] GET /users/
[debug] Processing with RumblWeb.UserController.index/2
  Parameters: %{}
  Pipelines: [:browser]
[info] Sent 500 in 53ms
[error] #PID<0.435.0> running RumblWeb.Endpoint (connection #PID<0.434.0>, stream id 1) terminated
Server: localhost:4000 (http)
Request: GET /users/
** (exit) an exception was raised:
    ** (ArgumentError) assign @user not available in eex template.

Please make sure all proper assigns have been set. If this
is a child template, ensure assigns are given explicitly by
the parent template as they are not automatically forwarded.

Available assigns: [:conn, :users, :view_module, :view_template]

        (phoenix_html) lib/phoenix_html/engine.ex:133: Phoenix.HTML.Engine.fetch_assign!/2
        (rumbl) lib/rumbl_web/templates/user/index.html.eex:2: RumblWeb.UserView."index.html"/1
        (rumbl) lib/rumbl_web/templates/layout/app.html.eex:26: RumblWeb.LayoutView."app.html"/1
        (phoenix) lib/phoenix/view.ex:410: Phoenix.View.render_to_iodata/3
        (phoenix) lib/phoenix/controller.ex:729: Phoenix.Controller.__put_render__/5
        (phoenix) lib/phoenix/controller.ex:746: Phoenix.Controller.instrument_render_and_send/4
        (rumbl) lib/rumbl_web/controllers/user_controller.ex:1: RumblWeb.UserController.action/2
        (rumbl) lib/rumbl_web/controllers/user_controller.ex:1: RumblWeb.UserController.phoenix_controller_pipeline/2
        (phoenix) lib/phoenix/router.ex:288: Phoenix.Router.__call__/2
        (rumbl) lib/rumbl_web/endpoint.ex:1: RumblWeb.Endpoint.plug_builder_call/2
        (rumbl) lib/plug/debugger.ex:122: RumblWeb.Endpoint."call (overridable 3)"/2
        (rumbl) lib/rumbl_web/endpoint.ex:1: RumblWeb.Endpoint.call/2
        (phoenix) lib/phoenix/endpoint/cowboy2_handler.ex:42: Phoenix.Endpoint.Cowboy2Handler.init/4
        (cowboy) /home/dan/Codes/rumbl/deps/cowboy/src/cowboy_handler.erl:41: :cowboy_handler.execute/2
        (cowboy) /home/dan/Codes/rumbl/deps/cowboy/src/cowboy_stream_h.erl:320: :cowboy_stream_h.execute/3
        (cowboy) /home/dan/Codes/rumbl/deps/cowboy/src/cowboy_stream_h.erl:302: :cowboy_stream_h.request_process/3
        (stdlib) proc_lib.erl:249: :proc_lib.init_p_do_apply/3

I know that this errors tell me that I don’t have assigned to the template the value of user but i did using this:

Content from :user/index.html.eex

<tr>
<td><%= render("user.html", user: @user) %></td>
<td><%= link "View", to: Routes.user_path(@conn, :show, @user.id) %></td>
</tr>

Content from :user/show.html.eex

<h1>Showing User</h1>
<%= render "user.html", user: @user %>

Content from: user/user.html.eex
<strong><%= first_name(@user) %></strong> (<%= @user.id %>)

So why does phoenix tell me that i haven’t assigned user in the template?

Thanks in advance

14 comments

/phoenix #book-programming-phoenix

0 1138 14

2020-01-17 14:54:09 UTC

First Post!

NobbZ

How does this function look like? Do you have any calls to render/* there?

Post #2

Most Liked

NobbZ

:users is not @user, your index.html.eex is wrong.

Post #4

NobbZ

And we are back to singular vs plural.

Post #13

Last Post!

wolfiton

Thanks @NobbZ

Had some problems in the context

defmodule Rumbl.Accounts do
  @moduledoc """
  The Accounts context.
  """

  alias Rumbl.Accounts.User 

  def list_users do
    [
      %User{id: "1", name: "José", username: "josevalim"},
      %User{id: "2", name: "Bruce", username: "redrapids"},
      %User{id: "3", name: "Chris", username: "chrismccord"}
    ]
  end

  def get_user(id) do
    Enum.find(list_users(), fn map -> map.id == id end)
  end

  def get_user_by(params) do
    Enum.find(list_users(), fn map ->
      Enum.all?(params, fn {key, val} -> Map.get(map, key) == val end)
    end)
  end
end

Works now

Post #15