elixir - Absinthe.Plug 不可用

Question

安装 absinthe_plug 后出现以下错误:

= Compilation error in file lib/kerrigan_api_web/router.ex ==
** (UndefinedFunctionError) function KerriganApiWeb.Absinthe.Plug.init/1 is undefined (module KerriganApiWeb.Absinthe.Plug is not available)

这是我的部门

{:phoenix, "~> 1.3.0"},
  {:phoenix_pubsub, "~> 1.0"},
  {:phoenix_ecto, "~> 3.2"},
  {:postgrex, ">= 0.0.0"},
  {:phoenix_html, "~> 2.10"},
  {:phoenix_live_reload, "~> 1.0", only: :dev},
  {:gettext, "~> 0.11"},
  {:cowboy, "~> 1.0"},
  {:poison, "~> 3.1"},
  {:absinthe, "~> 1.3.0"},
  {:absinthe_plug, "~> 1.3.0"},
  {:absinthe_ecto, git: "https://github.com/absinthe-graphql/absinthe_ecto.git"},
  {:faker, "~> 0.7"},

据我所知，我不需要添加任何其他内容。我在这里遵循了简单的步骤:

absinthe_slug

编辑:我的路由器

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

    get "/", PageController, :index
    resources "/hotsdata_user", UserController, except: [:new, :edit]
    resources "/battletag_toonhandle_lookup", PlayerController, except: [:new, :edit]

    forward "/graph", Absinthe.Plug, schema: KerriganApi.Schema
    forward "/graphiql", Absinthe.Plug.GraphiQL, schema: KerriganApi.Schema
  end

end

我添加了 require Absinthe.Plug 但这不起作用

Answer 1

您正在传递 alias ( KerriganApiWeb ) 到 scope ，它将别名添加到传递给内部路由声明函数的所有模块。这将转换 Absinthe.Plug至KerriganApiWeb.Absinthe.Plug在调用 forward ，这不是你想要的。您想要模块 Absinthe.Plug .有两种方法可以解决这个问题:

删除 alias参数和使用KerriganApiWeb在所有需要它的路由声明函数中显式地显示。

scope "/" do
  pipe_through :browser # Use the default browser stack

  get "/", KerriganApiWeb.PageController, :index
  resources "/hotsdata_user", KerriganApiWeb.UserController, except: [:new, :edit]
  resources "/battletag_toonhandle_lookup", KerriganApiWeb.PlayerController, except: [:new, :edit]

  forward "/graph", Absinthe.Plug, schema: KerriganApi.Schema
  forward "/graphiql", Absinthe.Plug.GraphiQL, schema: KerriganApi.Schema
end

新建scope使用相同的路径和管道并声明 forward那里的路线:

scope "/", KerriganApiWeb do
  pipe_through :browser # Use the default browser stack

  get "/", PageController, :index
  resources "/hotsdata_user", UserController, except: [:new, :edit]
  resources "/battletag_toonhandle_lookup", PlayerController, except: [:new, :edit]
end

scope "/" do
  forward "/graph", Absinthe.Plug, schema: KerriganApi.Schema
  forward "/graphiql", Absinthe.Plug.GraphiQL, schema: KerriganApi.Schema
end

Phoenix 文档 say第一个会增加应用程序的编译时间。即使不是这样，我也会选择第二个，因为我发现它更具可读性。