Rails: How can I render multiple objects to JSON?

Question

I am trying to render multiple objects as JSON. This is my render call:

render :json => {:widget => @widget.to_json(:include => :foo), 
                 :updated => Time.now.to_i}

I have to use to_json because of the include, and the addition updated so I know when the last call was made. The problem is that the to_json is rendered as a String instead of the object structure of the widget.

How do I get the full object structure of the widget and the updated information?

jdl · Accepted Answer · 2011-03-12 20:12:51Z

1

Move the :include => :foo into your Widget model.

class Widget < ActiveRecord::Base
  def as_json(options = {})
    super options.merge(:include => :foo)
  end
end

edited Mar 12, 2011 at 20:12

answered Mar 12, 2011 at 19:40

jdl

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4 Comments

Sixty4Bit Over a year ago

interesting, how to I ensure the options get passed as well? something easy like merge...

Sixty4Bit Over a year ago

It's not working... render :json => {:widget => @widget, :updated => time} does not include the :foo object

Sixty4Bit Over a year ago

so... small change, @widget isn't a single widget, it is an array of widgets. I have the include in the call to the db (Widget.includes(:foo).limit(10)), and that doesn't populate the object either.

jdl Over a year ago

I had a typo and wrote to_json when I meant as_json. It should work for an array of those objects as well. At least, it has when I've done it. If it's not working for you, please post maybe the real code instead of the mock-up.

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