我正在使用playframework 2.3.8并拥有一个视图类。在那里有一个按钮:
<button class="btn btn-default" type="button" onclick="@routes.Application.sendMap(myMap)" method="POST">Send</button>
我想在我的控制器类(Application.java)中向地图追加一个问题/答案对:
public static Result sendMap(Map<Question, List<Answer>> sendMap){
Question question4 = new Question("ertw", "SendMap Question?", 34, "Tim");
Answer answer41 = new Answer("werw", "ertw", "SendMap Answer 1!", 12, "Oliver");
Answer answer42 = new Answer("tzsdfu", "ertw", "SendMap Answer 2!", 1, "Marcus");
List<Answer> answerList4 = new ArrayList<Answer>();
answerList4.add(answer41);
answerList4.add(answer42);
sendMap.put(question4, answerList4);
return ok(views.html.frageAntwort.render(sendMap));
}
在我的routes.conf中,我已将路由添加到控制器类,并使用Map
作为参数:
POST /QuestionMap controllers.Application.sendMap(Map)
但现在我收到了错误:
type mismatch;
found : String
required: java.util.Map[model.Question,java.util.List[model.Answer]]
为什么地图会转换为字符串?
答案 0 :(得分:1)
默认参数类型为String:&#34;对于String类型的参数,参数类型是可选的。&#34; Documentation Play。你也可以看一下:How to create Map - post on Stack Overflow。您应该创建正确的模板,然后将其传递给配置文件
中方法中的参数答案 1 :(得分:0)
我已经几乎完全现在正在工作......尽管我还不完全明白:
我在视图类中的按钮,现在没有任何参数
<a href="@routes.Application.sendMap()"><button class="btn btn-default" type="button">Absenden</button>
我的控制器类现在正确地将另一个假问题/答案对放入地图中,然后将更改后的地图返回到index.scala.html:
return ok(views.html.index.render(myMap));
最重要的部分发生在routes.conf:
GET / controllers.Application.index()
GET /Fragenliste controllers.Application.sendMap()
GET /FrageStellen controllers.Application.askQuestion()
GET /Einstellungen controllers.Application.showSettings()
GET /Quiz controllers.Application.startQuiz()
sendMap()现在没有参数,并指向另一个名为/Fragenliste
的网站。
还有我不完全理解的部分 - 如果我使用
GET / controllers.Application.sendMap()
它指向Application.java中的index() - 方法。在那里我有另一个名为initialize()的方法:
public static Result index() {
initialize();
(...)
}
public static void initialize() {
Question question1 = new Question("xyz", "Do Androids dream?", 127, "Marcus");
Answer answer11 = new Answer("zab", "xyz", "Only of electric sheep!", 70, "Tibor");
Answer answer12 = new Answer("qwert", "xyz", "No, they dont!", 10, "Sarah");
List<Answer> answerList1 = new ArrayList<Answer>();
answerList1.add(answer11);
answerList1.add(answer12);
myMap.clear();
myMap.put(question1, answerList1);
}
在我清除旧地图的潜在休息之后,地图得到了构建。所以我的路线指向索引,现在新问题没有添加!为什么我不能指向索引并仍然有效?
基本上:
mysite.com/ = index ... user presses button for new question, gets transfered to
mysite.com/enterQuestion ... user enters question and hits "submit", gets transfered to
mysite.com/ = index
我目前的解决方案是:
mysite.com/ = index ... user presses button for new question, gets transfered to
mysite.com/enterQuestion ... user enters question and hits "submit", gets transfered to
mysite.com/ANOTHER_SITE != index, but looks and works exactly like the index!
有没有办法这样做?如果是,我的问题将完全解决。