如何将表单字段绑定到Play 2 Framework中的对象

问题描述

我一直无法让我的表单绑定正常工作(基本上是Trial and Error).在Play 2.0.3(Java)中，将表单绑定到由其他对象组成的模型的正确方法是什么?

I've been having trouble getting my Form bindings to work properly(basically Trial and Error).In Play 2.0.3 (Java) What is the proper way to bind a Form to a Model which is composed of other objects ?

我整理了这个小例子来尝试并更好地理解它.但是，即使这个基本示例似乎也有问题.

I cooked up this little example to try and understand it better.But even this basic example seems to have issues.

我试图将Form绑定到的简单类具有3个字段，即纯字符串字段，字符串列表和自定义字段，该字段只是字符串的包装.提交表单时，除自定义字段保留为空之外，所有字段都将被填充.

The Simple class which I'm trying to bind the Form to has 3 fields a plain String Field,A List of Strings and a custom field which is just a wrapper around a string.On submitting the Form all the fields are populated except the custom field which remains null.

这是实际的代码

控制器

static Form<Simple> simpleform=form(Simple.class);
public static Result simpleForm(){
Form<Simple> filledForm=simpleform.bindFromRequest();
        System.out.println(filledForm);
    return ok(views.html.simpleForm.render(filledForm.get().toString()));
}

模型

public class Simple {
    public String text;
    public List<String> stringList;
    public SimpleWrapper wrappedText;
    @Override
    public String toString(){
        return text +"-"+simpleWrapper+"-"+stringList;
}

public  class SimpleWrapper{
        String otherText;
        public SimpleWrapper(){}
        public SimpleWrapper(String otherText){
            this.otherText=otherText;
        }
        @Override
        public String toString(){
            return otherText;
        }
    }

查看

@(text:String)
@import helper._
@form(routes.Management.simpleForm()){
  <input type="hidden" value="string" name="stringList[0]">
  <input type="hidden" value="stringAgain" name="stringList[1]">
  <input type="hidden" value="wrapped" name="wrappedText.otherText">
  <input type="text" id="text" name="text">
  <input type="submit" value="submit">
}
This was passed @text

推荐答案

要允许对象的自动绑定，您必须为您的类提供setter方法.在我的实验中，SimpleWrapper类缺少该setter方法，因此该类应该是

To allow for automatic binding of objects you must supply a setter method for your class.In my experiment the SimpleWrapper class was missing the setter method the class should have been

public  class SimpleWrapper{
    String otherText;
    public SimpleWrapper(){}

    public setOtherText(String otherText){
     this.otherText=otherText;
    }

    @Override
    public String toString(){
        return otherText;
    }
}

似乎甚至构造函数都不相关.

It appears even the constructor is irrelevant.

这是有关基础Spring数据绑定器的链接链接可能会有所帮助.我是从Google Play小组获得的

This is a link about the underlying Spring data binder link that might be helpful. I got that from the play google group

这篇关于如何将表单字段绑定到Play 2 Framework中的对象的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！