Question

我尝试创建表单以编辑一对多关系。我创建了两个类：

class StudentGroup extends LongKeyedMapper[StudentGroup] with IdPK with OneToMany[Long, StudentGroup] {
  object groupName extends MappedString(this, 20)
  object students extends MappedOneToMany(Student,Student.studentGroup)
}


class Student extends LongKeyedMapper[Student] with IdPK {
  object firstName extends MappedString(this,35)
  object lastName extends MappedString(this,35)
  object studentGroup extends MappedLongForeignKey(this, StudentGroup)
}

然后我创建了一个代码段来显示一个包含以下代码的组：

  val addStudentContent: NodeSeq = <div>
    <input type="text" placeholder="First Name"></input>
    <input type="text" placeholder="Last Name"></input>
  </div>

  def addStudent = AppendHtml("studentlist", addStudentContent)

  def render =
      "#addstudent" #> SHtml.ajaxButton("Add student", () => addStudent)

点击＆＃39;添加学生＆＃39;按钮出现两个新字段，我可以在那里输入名字和姓氏。问题是 - 如何将这些数据存储在数据库中？任何提示？

由于

Answer 1

您可以通过多种方式开始解决此问题。我自己从不使用Mapper，所以可能有比我建议的更好的方法。但是，像Ajax example in Simply Lift这样的东西可以让你开始。将它应用到您的代码中，我们会得到如下内容。

object StudentSnippets {
  val addStudentContent: NodeSeq = <form data-lift="form.ajax">
      <div data-lift="StudentSnippets.ajaxSubmit"> // Calls ajaxSubmit below
        <input name="first" type="text" placeholder="First Name"></input>
        <input name="last"  type="text" placeholder="Last Name"></input>
        <input type="submit" value="Submit"></input>
      </div>
    </form>

  def addStudent = AppendHtml("studentlist", addStudentContent)

  def render =
    "#addstudent" #> SHtml.ajaxButton("Add student", () => addStudent)

  private object first extends RequestVar("")
  private object last  extends RequestVar("")

  def ajaxSumbit = {
    "name=first" #> SHtml.text(first.is, first(_), "id" -> "the_name") &
    "name=last"  #> (SHtml.text(last.is, last(_)) ++ 
      SHtml.hidden(ajaxProcess)) // Calls ajaxProcess below
  }

  def ajaxProcess = {
    println("First is "+first.is)
    println("Last is "+last.is)
    Noop  // This is the JS that will run after submit.
  }
}

您可以查看另一种方法here on the wiki。

有关Lift的更多帮助，我强烈建议您将问题发布到Lift Google Group。你会发现，与其他论坛如SO。

相比，你更多地了解了Lift的帮助

如何在scala lift中创建一对多关系的AJAX编辑表单？

1 个答案: