forms - 从表单绑定(bind)多个对象在play framework 2.0中

Question

我拼命地尝试从表单提交中接收值列表并将其绑定(bind)到对象列表。

有效的是检索单行:

//class
case class Task(name: String, description: String)

val taskForm: Form[Task] = Form(
  mapping(
  "name" -> text,
  "description" -> text

  )(Task.apply)(Task.unapply)
)


//form
<tr>
  <td><input name="name" type="text" class="span2" placeholder="Name..."></td>
  <td><textarea name="description" class="autoexpand span7" rows="1"     placeholder="Description..."></textarea>
  </td>
</tr>

//receiving action:
val task = taskForm.bindFromRequest.get

但是现在我想提交多个任务类型的对象，例如:

<tr>
  <td><input name="name[0]" type="text" class="span2" placeholder="Name..."></td>
  <td><textarea name="description[0]" class="autoexpand span7" rows="1" placeholder="Description..."></textarea></td>                   
</tr>
<tr>
  <td><input name="name[1]" type="text" class="span2" placeholder="Name..."></td>
  <td><textarea name="description[1]" class="autoexpand span7" rows="1" placeholder="Description..."></textarea></td>                   
</tr> 

做一个
taskForm.bindFromRequest.get
现在失败了。

有人想出解决方案吗？还是您对这种情况的处理方式完全不同？

Answer 1

好吧，感谢您提示我再次查看文档，我已经看过它们，但永远无法弥补如何将其组合以使其工作。我认为这是因为我是一个完全的 scala 菜鸟。
但是，我在给它一段时间后让它工作了，这是我的解决方案:

//classes
case class Task(name: String, description: String)
case class Tasks(tasks: List[Task])

val taskForm: Form[Tasks] = Form(
  mapping(
  "tasks" -> list(mapping(
    "name" -> text,
    "description" -> text
  )(Task.apply)(Task.unapply))
)(Tasks.apply)(Tasks.unapply)
)

//form
<tr>
  <td><input name="tasks[0].name" type="text" class="span2" placeholder="Name..."></td>
  <td><textarea name="tasks[0].description" class="autoexpand span7" rows="1" placeholder="Description..."></textarea></td>                   
</tr>
<tr>
  <td><input name="tasks[1].name" type="text" class="span2" placeholder="Name..."></td>
  <td><textarea name="tasks[1].description" class="autoexpand span7" rows="1" placeholder="Description..."></textarea></td>                   
</tr>

最后做一个:

val tasks = taskForm.bindFromRequest.get

检索任务列表。