将对象根添加到JSON [英] Add Object Root to JSON

问题描述

我正在寻找一种在grails（2.4.5）中将对象根添加到我的JSON的方法。通常情况下，Grails会呈现JSON对象列表，如下所示：

I'm looking for a way to add object roots to my JSON in grails (2.4.5). Generally, Grails renders JSON list of objects like so:

[{"id":1,"title":"Catan","description":"Catan"}]

但我需要它看起来像：

{"games": [{"id":1,"title":"Catan","description":"Catan"}]}

理想情况下，我想调整我为此创建的自定义编组器，但我不知道该怎么做：

Ideally I'd like to adjust the custom marshaller I've created to do this, but I'm not sure how to go about it:

class GameMarshaller {
    void register() {
      JSON.registerObjectMarshaller(Game) { Game node ->
        return [
          id            : node.id,
          title         : node.title,
          description : node.description
        ]
      }
   }
}

推荐答案

我回答了这里，它只是使根元素成为地图，然后使用游戏添加列表，然后将其转化为 JSON 。

I answered it here, it just about making the root element to be a map and adding the list into it with key games, then conver it to a JSON.

所以这应该适用于您的情况：

So this should work for your case:

class GameMarshaller {

    void register() {

      def games = Game.list().collect{ node ->
         [
          id            : node.id,
          title         : node.title,
          description : node.description
        ]
          }

      def result = ([games: games] as JSON)      

   }

}

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