grails - 具有hasMany的Grails类

Question

我有这个域类，它与一对一的关系如下面的动态脚手架所示:

域:

package mienapp

class Announcements {
    String user
    String title
    String comments
    Date dateCreated


    static hasMany = [tag: Tags]

    static mapping = {  
       comments sqlType: 'text'
    }

    static constraints = {
    }
}

Controller :

package mienapp
class AnnouncementsController {
  def scaffold = true
  def index() { 
     redirect(action: list)
  }
}

当 Controller 重定向到列表时，该表显示在公告类中定义的所有字段。如何显示表格中标签的字段值？

Answer 1

假设您的list方法返回一个带有Announcements实例的模型，

def list() {
  ..    
  [announcementsInstance: announcementsInstance, ...]
}

在您看来，您可以像这样访问标签

<g:each in="${announcementsInstance.tag}" var="tag">
  ${tag.someproperty}
</g:each>