Rails 3 - 返回包裝在單個對象中的JSON對象？

Question

我現在有一個控制器返回JSON對象，看起來像這樣：

def getModels 
    @vehicleModels = @vehicleModels.where(:vehicleMake_id => params[:vehicleMake]) 
    respond_with(@vehicleModels) 
end 

這工作得很好，並返回以下JSON：

[ 
{"created_at":"2011-06-22T15:49:06Z","id":1,"name":"A4","updated_at":"2011-06-22T15:49:06Z","vehicleMake_id":1}, 
{"created_at":"2011-06-22T15:49:06Z","id":2,"name":"A5","updated_at":"2011-06-22T15:49:06Z","vehicleMake_id":1}, 
{"created_at":"2011-06-22T15:49:06Z","id":3,"name":"A6","updated_at":"2011-06-22T15:49:06Z","vehicleMake_id":1}, 
{"created_at":"2011-06-22T15:49:06Z","id":4,"name":"A8","updated_at":"2011-06-22T15:49:06Z","vehicleMake_id":1}, 
{"created_at":"2011-06-22T15:49:06Z","id":5,"name":"TT","updated_at":"2011-06-22T15:49:06Z","vehicleMake_id":1}, 
{"created_at":"2011-06-22T15:49:06Z","id":10,"name":"Touareg","updated_at":"2011-06-22T15:49:06Z","vehicleMake_id":1} 
] 

的問題是，JQuery的下拉我試圖加載JSON到似乎期待一個JSON根節點。因此，直接加載JSON不起作用。但是，如果它有一個根節點，如下所示，它工作正常：

{"results":[ 
{"created_at":"2011-06-22T15:49:06Z","id":1,"name":"A4","updated_at":"2011-06-22T15:49:06Z","vehicleMake_id":1}, 
{"created_at":"2011-06-22T15:49:06Z","id":2,"name":"A5","updated_at":"2011-06-22T15:49:06Z","vehicleMake_id":1}, 
{"created_at":"2011-06-22T15:49:06Z","id":3,"name":"A6","updated_at":"2011-06-22T15:49:06Z","vehicleMake_id":1}, 
{"created_at":"2011-06-22T15:49:06Z","id":4,"name":"A8","updated_at":"2011-06-22T15:49:06Z","vehicleMake_id":1}, 
{"created_at":"2011-06-22T15:49:06Z","id":5,"name":"TT","updated_at":"2011-06-22T15:49:06Z","vehicleMake_id":1}, 
{"created_at":"2011-06-22T15:49:06Z","id":10,"name":"Touareg","updated_at":"2011-06-22T15:49:06Z","vehicleMake_id":1} 
]} 

所以，問題很簡單 - 我怎樣才能軌包括根節點？

我應該指出，我試圖通過在我的配置中設置ActiveRecord::Base.include_root_in_json = true來做到這一點，但只是將根節點添加到每個單獨的對象，而不是我需要的一個整體根節點。

謝謝！

Answer 1

你可以做以下

respond_with { :results => @vehicleModels }