elixir - 参数不包含 Elixir/Phoenix 中的 POST 正文

Question

我尝试构建一个非常简单的 REST API。它不包括数据库或模型。

这是我的路由器:

defmodule Zentonies.Router do
  use Zentonies.Web, :router

  pipeline :browser do
    plug :accepts, ["html"]
    plug :fetch_session
    plug :fetch_flash
    plug :protect_from_forgery
    plug :put_secure_browser_headers
  end

  pipeline :api do
    plug :accepts, ["json"]
  end

  scope "/v1/events/", Zentonies do
    pipe_through :api
    post "/call", PageController, :call
  end

end

这是 Controller :

defmodule Zentonies.PageController do
  require Logger
  import Joken
  use Zentonies.Web, :controller

  def index(conn, _params) do
    render conn, "index.html"
  end

  def call(conn, params) do
    Logger.debug inspect(params)
    conn
    |> put_status(200)
    |> text("Response.")
  end
end

现在，如果我 HTTP POST 到这个端点， inspect(params)不返回我的 POST 请求的 JSON 正文。相反，它返回 :call .

任何帮助是极大的赞赏!

Answer 1

一个 call/2函数是defined by Phoenix供自己使用，以便在每个 Phoenix Controller 中调度正确的操作。通过创建具有该名称的函数，您将覆盖内置功能。您必须为该操作使用不同的名称。查看 Phoenix.Controller.Pipeline 文档中的“ Controller 是插件”部分:

Controllers are plugs

Like routers, controllers are plugs, but they are wired to dispatch to a particular function which is called an action.

For example, the route:

get "/users/:id", UserController, :show

will invoke UserController as a plug:

UserController.call(conn, :show)

which will trigger the plug pipeline and which will eventually invoke the inner action plug that dispatches to the show/2 function in the UserController.