Play框架 - 复选框处理 [英] Play Framework - Checkbox processing

问题描述

如何处理Play中的复选框输入！框架？我应该在控制器上以字符串的形式捕获值吗？如何获得
的值是由用户检查的？

这是我的复选框的html代码

 ＃{list items：categories，as：'category'} 
< tr> 
< td>< input type =checkboxname =categoryid =category  -  $ {category.name}value =$ {category.id}/>< label for = 类 -  $ {category.name} > $ {category.name}< /标签>< / TD> 
< / tr> 
＃{/ list} 
  

解决方案

为了显示特定术语的状态（实际上有更多术语，
考虑具有多个术语的项目，这就是为什么您看到
名称为selectedTerms的情况） ：

 ＃{form @ ProjectController.update（project.alias），enctype：'multipart / form-data'，class： 'well form-horizo​​ntal'} 
＃{list terms，as：'term'} 
< input type =checkboxname =selectedTermsvalue =$ {term.name}/ > 
< span> $ {term.name}< span> 
＃{/ list} 
＃{/ form} 
  

问题是：我怎么知道用户选择了哪些条款是
？

那么，Play让我将这些条款定义为List，check如下：

  public static void update（String alias，List< String> selectedTerms）{
 // play with selected条款
} 
  

请注意：selectedTerms列表仅包含
由用户选择（TRUE）。因为我有他们的名字（或ids或
你想要的），所有的问题都解决了：）

Ps：你可能会问：你怎么显示这些在你看
后保存在数据库中的视图？

 ＃{列出术语，如：'term'} 
< input type =checkboxname =selectedTermsvalue =$ {term.name}$ {term.selected？ 检查：} /> 
< span> $ {term.name}< / span> 
 $ {/ list} 
  

感谢Cristian Boariu ，这里是你的灵感链接：

http://crisdev.wordpress.com/2012/05/19/play-framework-get-checkbox-value-from-view- in-controller /

How do I process a checkbox input in Play! Framework? Should I catch the value as a String at the controller? How to get what values are checked by a user?

This is the html code of my checkbox

#{list items:categories, as:'category'}
    <tr>
        <td><input type="checkbox" name="category" id="category-${category.name}" value="${category.id}" /><label for="category-${category.name}"> ${category.name}</label></td>
    </tr>
#{/list}

解决方案

To show the state of a specific term (actually there are more terms, think about a Project having multiple terms, that’s why you see the name being selectedTerms) in a view I did:

#{form @ProjectController.update(project.alias), enctype:'multipart/form-data', class:'well form-horizontal'}
#{list terms, as:'term'}
<input type="checkbox" name="selectedTerms" value="${term.name}"/>
<span>${term.name}<span>
#{/list}
#{/form}

Now the main question is: how do I know which of these terms were selected by the user?

Well, Play let me to define these terms as a List, check below:

public static void update(String alias, List<String> selectedTerms) {
//play with selected terms
}

Please note: selectedTerms list will contain ONLY the terms which are selected (TRUE) by the user. Because I have their names (or ids or what you want) all the problems are solved:)

Ps: You will probably ask: how do you show these in the view after you saved them in db?

#{list terms, as:'term'}
<input type="checkbox" name="selectedTerms" value="${term.name}" ${term.selected ? 'checked':''}/>
<span>${term.name}</span>
#{/list}

Thanks to Cristian Boariu, here is the link for your inspiration:

http://crisdev.wordpress.com/2012/05/19/play-framework-get-checkbox-value-from-view-in-controller/

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