How to return a json object in Rails without using render :json

Question

From what I have read, I can respond to a json request by using the following code:

respond_to do |format|
  format.json { render json: t.response }
end

My problem is that t.response is already in json format - and I think that my app is breaking because render json: is re-converting it to json. How do I avoid this, and simply return t.response.

Note that if I simply have t.response as my last line in the controller, the corresponding view is rendered - which is obviously not json.

Thanks!

EDIT: I am trying to get this working so I can send sms via tropo. If you have used tropo before, do you have any suggestions how to respond back to tropo correctly?

Art Shayderov · Accepted Answer · 2012-05-09 20:47:39Z

5

render json: just sets the content type to application/json (and calls to_json on the object passed to it if the object responds to to_json). It doesn't convert or somehow modifies your response.

http://apidock.com/rails/ActionController/Base/render

answered May 9, 2012 at 20:47

Art Shayderov

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1 Comment

jdoe Over a year ago

if the object responds to to_json. It's funny, but ALL objects in Rails respond to to_json, so there's no need to perform checking. Even 42.to_json will work.

jdoe · Accepted Answer · 2012-05-09 20:58:38Z

2

I'll show you how Rails deals with converting to json format. It's basically on line:

json = json.to_json(options) unless json.kind_of?(String)

So, strings aren't converted, other objects are converted to String via their to_json method. If your t.response returns a string then no conversion is performed.

answered May 9, 2012 at 20:58

jdoe

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Comments

Peter DeWeese · Accepted Answer · 2012-08-02 13:08:17Z

1

You can render text instead

respond_to do |format|
  format.json { render text: t.response }
end

edited Aug 2, 2012 at 13:08

Peter DeWeese

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answered May 9, 2012 at 20:33

Yuriy Goldshtrakh

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