Question

我试图将登录功能作为本书的一部分来实现并遇到问题：

== Compilation error on file web/controllers/user_controller.ex ==
** (CompileError) web/controllers/user_controller.ex:39: undefined      
function page_path/2
    (stdlib) lists.erl:1338: :lists.foreach/2
    (stdlib) erl_eval.erl:670: :erl_eval.do_apply/6
    (elixir) lib/kernel/parallel_compiler.ex:117: anonymous fn/4 in   
Kernel.ParallelCompiler.spawn_compilers/1

我的模块看起来像这样：

defmodule Rumbl.UserController do
  use Rumbl.Web, :controller
  plug :authenticate when action in [:index, :show]
  alias Rumbl.User

  def index(conn, _params) do
    users = Repo.all(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

  def new(conn, _params) do
    changeset = User.changeset(%User{})
    render conn, "new.html", changeset: changeset
  end

  def create(conn, %{"user" => user_params}) do
    changeset = User.registration_changeset(%User{}, user_params)
    case Repo.insert(changeset) do
      {:ok, user} ->
        conn
        |> put_flash(:info, "#{user.name} created!")
        |> redirect(to: user_path(conn, :index))
      {:error, changeset} ->
        render(conn, "new.html", changeset: changeset)
    end
  end

  defp authenticate(conn, _opts) do
    if conn.assigns.current_user do
      conn
    else
      conn
      |> put_flash(:error, "You must be logged in to access that page")
      |> redirect(to: page_path(conn, :index))
      |> halt()
    end
  end
end

我知道我的：控制器来自这里：

defmodule Rumbl.Web do
  @moduledoc """
  A module that keeps using definitions for controllers,
  views and so on.

  This can be used in your application as:

      use Rumbl.Web, :controller
      use Rumbl.Web, :view

  The definitions below will be executed for every view,
  controller, etc, so keep them short and clean, focused
  on imports, uses and aliases.

  Do NOT define functions inside the quoted expressions
  below.
  """

  def model do
    quote do
      use Ecto.Schema

      import Ecto
      import Ecto.Changeset
      import Ecto.Query
    end
  end

  def controller do
    quote do
      use Phoenix.Controller

      alias Rumbl.Repo
      import Ecto
      import Ecto.Query

      import Rumbl.Router.Helpers
      import Rumbl.Gettext

    end
  end

  def view do
    quote do
      use Phoenix.View, root: "web/templates"

      # Import convenience functions from controllers
      import Phoenix.Controller, only: [get_csrf_token: 0, get_flash: 2, view_module: 1]

      # Use all HTML functionality (forms, tags, etc)
      use Phoenix.HTML

      import Rumbl.Router.Helpers
      import Rumbl.ErrorHelpers
      import Rumbl.Gettext
    end
  end

  def router do
    quote do
      use Phoenix.Router
    end
  end

  def channel do
    quote do
      use Phoenix.Channel

      alias Rumbl.Repo
      import Ecto
      import Ecto.Query
      import Rumbl.Gettext
    end
  end

  @doc """
  When used, dispatch to the appropriate controller/view/etc.
  """
  defmacro __using__(which) when is_atom(which) do
    apply(__MODULE__, which, [])
  end
end

我已多次检查过该代码，无法查看任何内容。任何帮助将不胜感激。

Answer 1

你的路由器搞砸了。在控制台中尝试mix phoenix.routes。然后找到适当的something_path函数并使用它。样本输出。

page_path  GET     /           Module.PageController :index
user_path  GET     /login      Module.UserController :login
user_path  GET     /users      Module.UserController :index
user_path  GET     /users/:id  Module.UserController :show
user_path  POST    /users      Module.UserController :create
user_path  PATCH   /users/:id  Module.UserController :update
           PUT     /users/:id  Module.UserController :update
user_path  DELETE  /users/:id  Module.UserController :delete

因此，例如，如果我想重定向到重定向到主用户路径，我会使用user_path等。

如果可以，请向我们展示您的路由器和mix phoenix.routes任务的结果。

ProgrammingPhoenix Rumbl.Web未加载

1 个答案: