Please help with UndefinedFunctionError

Phoenix Forum Questions / Help
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1

Hello! I learning phoenix by book "Programmin Phoenix Productive > Reliable > Fast.
And I can’t fix error “function Rumbl.Repo.get/2 is undefined or private”. I don’t understand what’s wrong, maybe you can help me?

I think problem in this module, but don’t khow why

defmodule Rumbl.UserController do
	use Rumbl.Web, :controller
	
    alias Rumbl.Repo
	
	def index(conn, _params) do
		users = Repo.all(Rumbl.User)
		render conn, "index.html", users: users
	end
	
	def show(conn, %{"id" => id}) do
		user = Repo.get(Rumbl.User, id)
		render conn, "show.html", user: user
	end
end

Screenshots https://yadi.sk/i/wy6VxHZLfIUH0A
https://yadi.sk/i/MZ062xVGfl7bVQ

2

How did you defined Rumbl.Repo? Because it seems to cause problems there.

3

Hi,

Welcome to the forum

What version of programming phoenix are you using? 1.4 or 1.3?

4

It seems You are following the old version of programming Phoenix… (for 1.2). There is an updated version now.

5

in repo.ex file
and alias Rumbl.Repo dont’ was include to example code, I try add this after readint stackoverflow

defmodule Rumbl.Repo do
	@moduledoc """
	In memory repository.
	"""
	
	def all(Rumbl.User) do
		[%Rumbl.User{id: "1", name: "José", username: "josevalim", password: "elixir"},
		%Rumbl.User{id: "2", name: "Bruce", username: "redrapids", password: "7langs"},
		%Rumbl.User{id: "3", name: "Chris", username: "chrismccord", password: "phx"}]
	end
	def all(_module), do: []
	def get_by(module, params) do
		Enum.find all(module), fn map ->
			Enum.all?(params, fn {key, val} -> Map.get(map, key) == val end)
		end
	end
end
6

Hello, thanks, Version 1.2.5.

7

Hello for everyone. I check version now - it’s 1.2.5. And I check source code from book, but it different than in my books example. My book of 2016 year, Code from source

defmodule RumblWeb.UserController do
  use RumblWeb, :controller

  alias Rumbl.Accounts

  def index(conn, _params) do
    users = Accounts.list_users()
    render(conn, "index.html", users: users)
  end

  def show(conn, %{"id" => id}) do
    user = Accounts.get_user(id)
    render(conn, "show.html", user: user)
  end
end
8

Oh, shame shame shame. I forget or delete get function from repo.ex. Thanks all for
your help)

defmodule Rumbl.Repo do
	@moduledoc """
	In memory repository.
	"""
	
	def all(Rumbl.User) do
		[%Rumbl.User{id: "1", name: "José", username: "josevalim", password: "elixir"},
		%Rumbl.User{id: "2", name: "Bruce", username: "redrapids", password: "7langs"},
		%Rumbl.User{id: "3", name: "Chris", username: "chrismccord", password: "phx"}]
	end
	def all(_module), do: []
	def get(module, id) do
		Enum.find all(module), fn map -> map.id == id end
	end
	def get_by(module, params) do
		Enum.find all(module), fn map ->
			Enum.all?(params, fn {key, val} -> Map.get(map, key) == val end)
		end
	end
en
2 Likes
9

You are welcome, great that you solved the problem