Playframework - 分包控制器和路由问题答案

【问题标题】：Playframework - subpackaged controllers and routing issuesPlayframework - 分包控制器和路由问题
【发布时间】：2017-12-16 15:28:55
【问题描述】：

系统详情：

Arch Linux：4.11.7-1-ARCH x64
Oracle Java JDK：1.8.0_131
IntelliJ Scala 插件：2017.1.19（最新）
SBT：0.13.13（最新）
IntelliJ IDEA Ultimate 2017.1.4
播放框架：2.6.1

简介

注意：我是新手玩框架

我正在使用提供的“play-starter”项目，并通过它创建了一个控制器来路由到各个页面。这可以通过不使用子包来实现。

目录结构：{root}/app/controllers/MyController

MyController.index() 与路由路径一起显示：

GET     /                        controllers.MyController.index

这按预期显示，我创建的 POST 方法也按预期运行。

问题：

我尝试创建子包来启动我的项目，但每次都收到错误（详情如下）。

浏览routing documentation 没有找到解决方案（对我而言）。我搜索了类似的问题，发现here是一个非常相似的问题，但是答案并没有解决我的问题。

blog 似乎解决了这个问题，我尝试了但没有成功。

错误输出：

/usr/lib/jvm/java-8-jdk/bin/java -agentlib:jdwp=transport=dt_socket,address=127.0.0.1:37417,suspend=y,server=n -Xms512M -Xmx1024M -Xss1M -XX:+CMSClassUnloadingEnabled -Dfile.encoding=UTF-8 -classpath /home/cybex/.IntelliJIdea2017.1/config/plugins/Scala/launcher/sbt-launch.jar:/usr/share/intellij-idea-ultimate-edition/lib/idea_rt.jar xsbt.boot.Boot run
Connected to the target VM, address: '127.0.0.1:37417', transport: 'socket'
[info] Loading global plugins from /home/cybex/.sbt/0.13/plugins
[info] Loading project definition from /home/cybex/Documents/play-project/eatalot/project
[info] Set current project to EatAloT (in build file:/home/cybex/Documents/University/Year%205/WRR301/eatalot/eatalot/)

--- (Running the application, auto-reloading is enabled) ---

[info] p.c.s.AkkaHttpServer - Listening for HTTP on /0:0:0:0:0:0:0:0:8080

(Server started, use Enter to stop and go back to the console...)

[info] Compiling 35 Scala sources and 13 Java sources to /home/cybex/Documents/play-project/eatalot/target/scala-2.12/classes...
[error] /home/cybex/Documents/play-project/eatalot/conf/routes:8: type AccountController is not a member of package controllers.User.routes
[error] GET        /user                 controllers.User.routes.AccountController.index()
[error] /home/cybex/Documents/play-project/eatalot/conf/routes:8: type AccountController is not a member of package controllers.User.routes
[error] GET        /user                 controllers.User.routes.AccountController.index()
[error] /home/cybex/Documents/play-project/eatalot/conf/routes:8: type AccountController is not a member of package controllers.User.routes
[error] GET        /user                 controllers.User.routes.AccountController.index()
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/index.scala.html:28: object AccountController is not a member of package controllers.User.routes
[error]         <form action="@controllers.User.routes.AccountController.login()" method="get">
[error]                                                ^
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/index.scala.html:32: object AccountController is not a member of package controllers.User.routes
[error]         <form action="@controllers.User.routes.AccountController.register()" method="get">
[error]                                                ^
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/login.scala.html:17: object AccountController is not a member of package controllers.User.routes
[error]         <form action="@controllers.User.routes.AccountController.doLogin()" method="post">
[error]                                                ^
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/register.scala.html:16: object AccountController is not a member of package controllers.User.routes
[error]         <form method="post" action="@controllers.User.routes.AccountController.doRegister()">
[error]                                                              ^
[error] 7 errors found
[error] (compile:compileIncremental) Compilation failed
[info] Compiling 35 Scala sources and 13 Java sources to /home/cybex/Documents/play-project/eatalot/target/scala-2.12/classes...
[error] /home/cybex/Documents/play-project/eatalot/conf/routes:8: type AccountController is not a member of package controllers.User.routes
[error] GET        /user                 controllers.User.routes.AccountController.index()
[error] /home/cybex/Documents/play-project/eatalot/conf/routes:8: type AccountController is not a member of package controllers.User.routes
[error] GET        /user                 controllers.User.routes.AccountController.index()
[error] /home/cybex/Documents/play-project/eatalot/conf/routes:8: type AccountController is not a member of package controllers.User.routes
[error] GET        /user                 controllers.User.routes.AccountController.index()
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/index.scala.html:28: object AccountController is not a member of package controllers.User.routes
[error]         <form action="@controllers.User.routes.AccountController.login()" method="get">
[error]                                                ^
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/index.scala.html:32: object AccountController is not a member of package controllers.User.routes
[error]         <form action="@controllers.User.routes.AccountController.register()" method="get">
[error]                                                ^
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/login.scala.html:17: object AccountController is not a member of package controllers.User.routes
[error]         <form action="@controllers.User.routes.AccountController.doLogin()" method="post">
[error]                                                ^
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/register.scala.html:16: object AccountController is not a member of package controllers.User.routes
[error]         <form method="post" action="@controllers.User.routes.AccountController.doRegister()">
[error]                                                              ^
[error] 7 errors found
[error] (compile:compileIncremental) Compilation failed
[error] application - 

! @74j57k5c0 - Internal server error, for (GET) [/] ->

play.sbt.PlayExceptions$CompilationException: Compilation error[type AccountController is not a member of package controllers.User.routes]
    at play.sbt.PlayExceptions$CompilationException$.apply(PlayExceptions.scala:27)
    at play.sbt.PlayExceptions$CompilationException$.apply(PlayExceptions.scala:27)
    at scala.Option.map(Option.scala:145)
    at play.sbt.run.PlayReload$$anonfun$taskFailureHandler$1.apply(PlayReload.scala:49)
    at play.sbt.run.PlayReload$$anonfun$taskFailureHandler$1.apply(PlayReload.scala:44)
    at scala.Option.map(Option.scala:145)
    at play.sbt.run.PlayReload$.taskFailureHandler(PlayReload.scala:44)
    at play.sbt.run.PlayReload$.compileFailure(PlayReload.scala:40)
    at play.sbt.run.PlayReload$$anonfun$compile$1.apply(PlayReload.scala:17)
    at play.sbt.run.PlayReload$$anonfun$compile$1.apply(PlayReload.scala:17)
[info] Compiling 35 Scala sources and 13 Java sources to /home/cybex/Documents/play-project/eatalot/target/scala-2.12/classes...
[error] /home/cybex/Documents/play-project/eatalot/conf/routes:8: type AccountController is not a member of package controllers.User.routes
[error] GET        /user                 controllers.User.routes.AccountController.index()
[error] /home/cybex/Documents/play-project/eatalot/conf/routes:8: type AccountController is not a member of package controllers.User.routes
[error] GET        /user                 controllers.User.routes.AccountController.index()
[error] /home/cybex/Documents/play-project/eatalot/conf/routes:8: type AccountController is not a member of package controllers.User.routes
[error] GET        /user                 controllers.User.routes.AccountController.index()
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/index.scala.html:28: object AccountController is not a member of package controllers.User.routes
[error]         <form action="@controllers.User.routes.AccountController.login()" method="get">
[error]                                                ^
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/index.scala.html:32: object AccountController is not a member of package controllers.User.routes
[error]         <form action="@controllers.User.routes.AccountController.register()" method="get">
[error]                                                ^
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/login.scala.html:17: object AccountController is not a member of package controllers.User.routes
[error]         <form action="@controllers.User.routes.AccountController.doLogin()" method="post">
[error]                                                ^
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/register.scala.html:16: object AccountController is not a member of package controllers.User.routes
[error]         <form method="post" action="@controllers.User.routes.AccountController.doRegister()">
[error]                                                              ^
[error] 7 errors found
[error] (compile:compileIncremental) Compilation failed
[info] Compiling 35 Scala sources and 13 Java sources to /home/cybex/Documents/play-project/eatalot/target/scala-2.12/classes...
[error] /home/cybex/Documents/play-project/eatalot/conf/routes:8: type AccountController is not a member of package controllers.User.routes
[error] GET        /user                 controllers.User.routes.AccountController.index()
[error] /home/cybex/Documents/play-project/eatalot/conf/routes:8: type AccountController is not a member of package controllers.User.routes
[error] GET        /user                 controllers.User.routes.AccountController.index()
[error] /home/cybex/Documents/play-project/eatalot/conf/routes:8: type AccountController is not a member of package controllers.User.routes
[error] GET        /user                 controllers.User.routes.AccountController.index()
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/index.scala.html:28: object AccountController is not a member of package controllers.User.routes
[error]         <form action="@controllers.User.routes.AccountController.login()" method="get">
[error]                                                ^
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/index.scala.html:32: object AccountController is not a member of package controllers.User.routes
[error]         <form action="@controllers.User.routes.AccountController.register()" method="get">
[error]                                                ^
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/login.scala.html:17: object AccountController is not a member of package controllers.User.routes
[error]         <form action="@controllers.User.routes.AccountController.doLogin()" method="post">
[error]                                                ^
[error] /home/cybex/Documents/play-project/eatalot/app/views/User/Account/register.scala.html:16: object AccountController is not a member of package controllers.User.routes
[error]         <form method="post" action="@controllers.User.routes.AccountController.doRegister()">
[error]                                                              ^
[error] 7 errors found
[error] (compile:compileIncremental) Compilation failed

问题详情：

我创建了一个子包User。在这个子包中，我有一个控制器 AccountController

AccountController 有几个功能，我将使用doLogin() 来回答这个问题

目录结构：{root}/app/controllers/User/AccountController

建议的解决方案：

所有解决方案都指向相同的代码（这会导致各种错误）

每个包都有自己的路由文件。就我而言，我应该使用controllers.User.routes，后跟路由文件的控制器名称和函数

例如

POST       /user/login        controllers.User.routes.AccountController.doLogin()

目录布局是controllers/User/AccountController 并使用它在视图中显示（found here）我使用

<form action="@controllers.User.routes.AccountController.doLogin()" method="post">

但是这不起作用。

额外信息：

{root}/app/controllers/User/AccountController

package controllers.User;

import models.User;
import play.Logger;
import play.data.DynamicForm;
import play.data.FormFactory;
import play.mvc.Controller;
import play.mvc.Result;
import views.html.User.Account.*;

import javax.inject.Inject;
import java.util.Random;
import java.util.Set;

public class AccountController extends Controller{

    @Inject
    FormFactory formFactory;

    public Result index() {
        //...
    }

    public Result login(){
        //...
    }

    public Result doLogin(){
        //...
    }

    public Result register(){
        //...
    }

    public Result doRegister(){
        //...
    }

}

{root}/conf/routes

# Routes
# This file defines all application routes (Higher priority routes first)
# ~~~~

# An example controller showing a sample home page
GET     /                        controllers.HomeController.index

GET        /user                 controllers.User.routes.AccountController.index()
GET        /user/register        controllers.User.routes.AccountController.register()
GET        /user/login           controllers.User.routes.AccountController.login()

##disable this an you will recieve a 403 forbidden error, the CRSF filter is used for cross site scripting prevention, use for authentication
#+ nocsrf
POST       /user/register        controllers.User.routes.AccountController.doRegister()
#+ nocsrf
POST       /user/login           controllers.User.routes.AccountController.doLogin()

# An example controller showing how to use dependency injection
GET     /count                   controllers.CountController.count
# An example controller showing how to write asynchronous code
GET     /message                 controllers.AsyncController.message

# Map static resources from the /public folder to the /assets URL path
GET     /assets/*file            controllers.Assets.versioned(path="/public", file: Asset)

{root}/app/views/User/Account/index.scala.html

@(users: Set[User])

<html>
    <header>
        <title>All users in list</title>
    </header>
    <body>
        <h1>All users in list</h1>
        <br>
        <table>
            <tr>
                <th>ID</th>
                <th>Name</th>
                <th>Surname</th>
                <th>Cellphone</th>
            </tr>
             @for(user <- users) {
            <tr>
            <td>@user.id</td>
            <td>@user.name</td>
            <td>@user.surname</td>
            <td>@user.cellNumber</td>
            </tr>
            }
        </table>
        <br>
        <br>
        <form action="@controllers.User.routes.AccountController.login()" method="get">
            <input type="submit" value="Login">
        </form>
        <br>
        <form action="@controllers.User.routes.AccountController.register()" method="get">
            <input type="submit" value="Register">
        </form>
    </body>
</html>

{root}/app/views/User/Account/login.scala.html

@(message: String)

<html>
    <header>
        <title>Login Form</title>
    </header>
    <body>
        <h1>Login Form</h1>
        <br/>
        <label>Email:</label> <input type="email" name="edtEmail"/>
        <br/>
        <br/>
        <label>Password:</label> <input type="password" name="edtPassword"/>
        <br/>
        <label>@message</label>
        <br/>
        <form action="@controllers.User.routes.AccountController.doLogin()" method="post">
            <input type="submit" value="Login">
        </form>
    </body>
</html>

【问题讨论】：

很高兴您的问题已得到解决。下次，请尝试分享一个最小（！）案例。这会让我更有动力去帮忙;)

标签： java scala intellij-idea playframework sbt

【解决方案1】：

似乎是一些错误，因为重做我之前所做的任何“测试”以使其正常工作，已证明可以解决问题。

Play 2.6.1 项目的正式解决方案有一个子包并需要路由到它：

子包名称：User 分包控制器：AccountController

项目应用目录结构：

app/
      controllers/ (provided)
      filters/ (provided)
      models/ 
      services/ (provided)
      views/  (provided)

控制器目录

controllers/
          User/ (sub package)
                AccountController.java
          HomeController.java (provided)

帐户控制器包含方法：

索引()
注册()
doRegister()

查看目录

views/
          User/
                Account/
                     index.scala.html
                     register.scala.html
          index.scala.html (provided)

注意：尽量保持相同的目录结构（见User/Account/{controller function name}）

路由文件条目conf/routes：

GET        /user                 controllers.User.AccountController.index
GET        /user/register        controllers.User.AccountController.register()

#disable this (below) and you will receive a 403 forbidden error, the CRSF filter is used for cross site scripting prevention, use for authentication. 
#You can apply this autentication: see https://stackoverflow.com/questions/45017920/post-method-rendering-403-forbidden-page-instead-of-executing-post-method-code

#+ nocsrf
POST       /user/register        controllers.User.AccountController.doRegister()

希望这会有所帮助！

【讨论】：