grails：在gsp中显示来自数据库的元素列表 [英] grails: show list of elements from database in gsp

问题描述

在我的Grails应用程序中，我需要从数据库获取一些数据并将其显示在gsp页面中。
我知道我需要从控制器获取数据，例如

  List< Event> todayEvents = Event.findAllByStartTime（today）
  

获取所有带日期的事件
现在，我该如何将它呈现在gsp页面中？如何将这个Event对象列表传递给gsp？

非常感谢

解决方案

您可以使用Grails脚手架学习许多基本概念。使用域创建一个新项目并发出命令 generate-all com.sample.MyDomain 它将生成一个控制器和一个视图。

要回答你的问题，请在控制器中创建一个动作：

  class EventController {
 
 //当控制器操作作为REST服务公开时很有用。 
 static allowedMethods = [save：POST，update：POST，delete：POST] 
 
 def showEvents（）{
 List< Event> todayEvents = Event.findAllByStartTime（today）
 [eventsList：todayEvents] 
} 
} 
  

在您的GSP上，您可以循环浏览列表并按照您的意愿进行打印。

 < g：each in =$ {eventsList}var =p> 
< li> $ {p}< / li> 
< / g：每个> 
  

祝您好运

in my grails app I need to get some data from database and show it in a gsp page. I know that I need to get data from controller, for example

List<Event> todayEvents = Event.findAllByStartTime(today)

gets all Event with date today Now, how can I render it in a gsp page?How can I pass that list of Event objects to gsp?

Thanks a lot

解决方案

You can learn many of the basic concepts using Grails scaffolding. Create a new project with a domain and issue command generate-all com.sample.MyDomain it will generate you a controller and a view.

To answer your question create a action in a controller like this:

class EventController {

    //Helpful when controller actions are exposed as REST service.     
    static allowedMethods = [save: "POST", update: "POST", delete: "POST"]

    def showEvents() {
        List<Event> todayEvents = Event.findAllByStartTime(today)
        [eventsList:todayEvents] 
    } 
}

On your GSP you can loop through the list and print them as you wish

<g:each in="${eventsList}" var="p">
 <li>${p}</li>
</g:each>

Good luck

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