Force render format for all actions

Question

I want to respond with json to all formats.

I can force the render format to json so the action will render show.json despite the accept header:

  def show
    render formats: :json
  end

How I can set render format for all actions of the controller?

Something like this:

class GalleriesController < ApplicationController
  formats :json
end

Have you tried `respond_to do |format| format.html { render formats: :json } format.js { render formats: :json } end` ? — Richard Peck, Nov 07 '13 at 10:42
Check this out http://stackoverflow.com/questions/4643738/rails-3-respond-to-default-format — Sachin Prasad, Nov 07 '13 at 10:43
I don't want to add code to each action so it seems that http://stackoverflow.com/a/6519357/1644531 is only way to handle this? — freemanoid, Nov 07 '13 at 12:04
if you don't put code into your actions, what are they going to render in the show action? — phoet, Nov 07 '13 at 13:05
@phoet all actions by default renders the view with its name :\ — freemanoid, Nov 07 '13 at 15:04

score 9 · Answer 1 · edited May 23 '17 at 12:09

9

As a summary of all comments to the questions and readability for future users, you can do, as mentioned here:

before_filter :default_format_json

def default_format_json
  request.format = "json"
end

edited May 23 '17 at 12:09

Community

answered Mar 18 '15 at 16:11

Mick F

1

Looks good. But are you sure that this is correct? I don't want to change request format, I want to change the format of **response**. – freemanoid Mar 19 '15 at 12:05
At least, it works. Up to you to adopt this solution or not :) – Mick F Mar 19 '15 at 18:56

JellicleCat · Answer 2 · 2020-10-23T18:53:54.653

1

In your controller:

def my_action
  formats.clear
  formats << :json
end

(I've only tested this in Rails 4.2 and 3.2.)

formats returns an Array of format symbols. It is delegated to @_lookup_context, which is an instance of ActionView::LookupContext.

edited Oct 23 '20 at 18:53

answered Sep 25 '20 at 17:31

JellicleCat

phlegx · Answer 3 · 2016-05-11T22:15:03.587

-1

before_filter :force_json

def force_json
  response.content_type = Mime[:json]
end

With respond_to:

def action
  respond_to do |format|
    format.any(:html, :js, :json) { render json: @object.to_json }
  end
end

edited May 11 '16 at 22:15

answered May 11 '16 at 21:35

phlegx

3 Answers3