Question

当路线不匹配时，我正在尝试发送json。从error_view.ex开始，我首先遇到错误：

def template_not_found(_template, assigns) do
  render "404.html", assigns
end

但如果我将其更改为：

def template_not_found(_template, assigns) do
  %{message: "custom error"}
end

它实际上并不发送json，而是返回no function clause matching in Phoenix.Template.HTML.encode_to_iodata!/1。我相信这是因为它希望发送一些HTML。是否可以将其更改为发送json？

我的路由器：

defmodule AppWeb.Router do
  use AppWeb, :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 "/", AppWeb do
    pipe_through :browser # Use the default browser stack

    get "/", PageController, :index
  end

  scope "/api", AppWeb do
    pipe_through :api
  end

end

Answer 1

在config/config.exs更新render_error选项：

config :my_app, MyApp.Endpoint,
  render_errors: [view: MyApp.ErrorView,
                  format: "json",
                  accepts: ~w(json)]

Elixir / Phoenix在ErrorView

1 个答案: