How can I return json data from multiple rails Models? -

i have created backend rails server strictly serves ios app built. upon initial loading of ios app, needs pull in dozen models , data. want avoid 1) dozen separate server calls , b) chaining dozen calls in completions blocks. i.e. call a, when done, call b, when b done, call c... etc.

i make load resource. return data dozen models in 1 call. resulting json like...

{     "widgets": [         {             "id": 1,             "desc": "one"         },         {             "id": 2,             "desc": "two"         }     ],     "gadgets": [         {             "id": 1,             "desc": "one"         }     ],           "flidgets": [         {             "id": 1,             "desc": "one"         }     ] } 

i prefer not include timestamps.

how can this? suppose create new controller, initialloadcontroller. model data of dozen objects. how can render dozen models json , format this?

please check code below:

class initialloadscontroller < applicationcontroller   def load     widgets = widget.select(:id, :desc)     gadgets = gadget.select(:id, :desc)     flidgets = flidget.select(:id, :desc)     response = {       widgets: widgets,       gadgets: gadgets,       flidgets: flidgets     }     render json: response   end  end 

even can use jbuilder render json response (as alternative render json: response).