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我一直在關注網站上的榆樹教程,我試了一下在Mac上和它的工作,但是當我將它移植到Linux,它給了我下面的錯誤:我找不到模塊「窗口小部件」
- I cannot find module 'Widget'.
Module 'Main' is trying to import it.
Potential problems could be:
* Misspelled the module name
* Need to add a source directory or new dependency to elm-package.json
這是將其正在使用的代碼:
main.elm
module Main exposing (..)
import Html exposing (Html)
import Html.App
import Widget
-- MODEL
type alias AppModel =
{ widgetModel : Widget.Model
}
initialModel : AppModel
initialModel =
{ widgetModel = Widget.initialModel
}
init : (AppModel, Cmd Msg)
init =
(initialModel, Cmd.none)
-- MESSAGES
type Msg
= WidgetMsg Widget.Msg
-- VIEW
view : AppModel -> Html Msg
view model =
Html.div []
[ Html.App.map WidgetMsg (Widget.view model.widgetModel)
]
-- UPDATE
update : Msg -> AppModel -> (AppModel, Cmd Msg)
update message model =
case message of
WidgetMsg subMsg ->
let
(updatedWidgetModel, widgetCmd) =
Widget.update subMsg model.widgetModel
in
({ model | widgetModel = updatedWidgetModel }, Cmd.map WidgetMsg widgetCmd)
-- SUBSCIPTIONS
subscriptions : AppModel -> Sub Msg
subscriptions model =
Sub.none
-- APP
main : Program Never
main =
Html.App.program
{ init = init
, view = view
, update = update
, subscriptions = subscriptions
}
widget.elm
module Widget exposing (..)
import Html exposing (Html, button, div, text)
import Html.Events exposing (onClick)
-- MODEL
type alias Model =
{ count : Int
}
initialModel : Model
initialModel =
{ count = 0
}
-- MESSAGES
type Msg
= Increase
-- VIEW
view : Model -> Html Msg
view model =
div []
[ div [] [ text (toString model.count) ]
, button [ onClick Increase ] [ text "Click" ]
]
-- UPDATE
update : Msg -> Model -> (Model, Cmd Msg)
update message model =
case message of
Increase ->
({ model | count = model.count + 1 }, Cmd.none)
有關如何解決這個問題的任何提示?
您是否嘗試重命名爲Widget.elm? (這可能是區分大小寫的問題。) – Tosh
如果您的Elm源代碼不在同一個文件夾中,請檢查'elm-package.json',您應該在'source-directories'中指定該文件夾,如[here] (https://github.com/halfzebra/elm-examples/blob/master/examples/fractal-architecture/elm-package.json) – halfzebra