Compilation error

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1

I practice nested resources, but I got problem in “create” controller.ex. the problem is

Compilation error in file lib/lat5_web/controllers/thread_controller.ex ==
** (CompileError) lib/lat5_web/controllers/thread_controller.ex:32: undefined function category_thread_path/4
    (elixir) src/elixir_locals.erl:107: :elixir_locals."-ensure_no_undefined_local/3-lc$^0/1-0-"/2
    (elixir) src/elixir_locals.erl:107: anonymous fn/3 in :elixir_locals.ensure_no_undefined_local/3
    (stdlib) erl_eval.erl:680: :erl_eval.do_apply/6
    (elixir) lib/kernel/parallel_compiler.ex:208: anonymous fn/4 in Kernel.ParallelCompiler.spawn_workers/6

defmodule Lat5Web.ThreadController do
  use Lat5Web, :controller

  alias Lat5.Forums
  alias Lat5.Forums.Thread


  def index(conn, _params, category) do
    # we pass it to the `list_threads` function
    threads = Forums.list_threads(category)
    # and we pass it in our call to render, so templates can refer to it as
    # @category.
    render(conn, "index.html", threads: threads, category: category)
  end

  def new(conn, _params, category) do
  changeset =
    %Thread{category_id: category.id}
    |> Forums.change_thread
  render(conn, "new.html", changeset: changeset, category: category)
  end

  def create(conn, %{"thread" => thread_params}, category) do
    thread_params =
      thread_params
      |> Map.put("category_id", category.id)

    case Forums.create_thread(thread_params) do
      {:ok, thread} ->
        conn
        |> put_flash(:info, "Thread created successfully.")
        |> redirect(to: category_thread_path(conn, :show, category, thread))
      {:error, %Ecto.Changeset{} = changeset} ->
        render(conn, "new.html", changeset: changeset, category: category)
    end
  end

  def show(conn, %{"id" => id}, category) do
  thread = Forums.get_thread!(category, id)
  render(conn, "show.html", thread: thread, category: category)
  end

  def edit(conn, %{"id" => id}, category) do
    thread = Forums.get_thread!(category, id)
    changeset = Forums.change_thread(thread)
    render(conn, "edit.html", thread: thread, changeset: changeset, category: category)
  end

  def update(conn, %{"id" => id, "thread" => thread_params}, category) do
   thread = Forums.get_thread!(category, id)

    case Forums.update_thread(thread, thread_params) do
     {:ok, thread} ->
       conn
       |> put_flash(:info, "Thread updated successfully.")
       |> redirect(to: category_thread_path(conn, :show, category, thread))
     {:error, %Ecto.Changeset{} = changeset} ->
       render(conn, "edit.html", thread: thread, changeset: changeset, category: category)
    end
  end

  def delete(conn, %{"id" => id}, category) do
   thread = Forums.get_thread!(category, id)
   {:ok, _thread} = Forums.delete_thread(thread)

   conn
   |> put_flash(:info, "Thread deleted successfully.")
   |> redirect(to: category_thread_path(conn, :index, category))
  end

  def action(conn, _) do
    category = Forums.get_category!(conn.params["category_id"])
    args = [conn, conn.params, category]
    apply(__MODULE__, action_name(conn), args)
  end

end
2

There is indeed no such function, perhaps it is in Lat5Web.Routes.Helpers? Exact location depends on your project architecture and phoenix version.

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