How to tell which format a controller has resolved to render

Question

In a rails controller action with the following code:

respond_to do |format|
  format.json{ render :json=>  {:status => 200, :response=>@some_resource} }
  format.html { redirect_to(some_resource_path)}
end

How can I log the format the controller will resolve i.e. 'HTML' or 'json'? format is of type Collector. Is there a way of getting a string denoting the format?

try params[:format] http://stackoverflow.com/questions/1671111/methods-for-limiting-the-rails-render-format-to-html — gayavat, Jun 22 '12 at 14:00

score 87 · Accepted Answer · answered Jun 22 '12 at 14:18

87

The method to access the format is:

controller.request.format

answered Jun 22 '12 at 14:18

Anil

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7

Thanks Anil. So from the controller it is just request.format. – Undistraction Jun 22 '12 at 14:29
3

Better to use request.format, because controller.request.format throws undefined local variable or method `controller' – Nathan B Jul 28 '18 at 15:32

score 14 · Answer 2 · answered Apr 18 '19 at 23:02

14

in your controller you can do:

request.format
request.format.html?
request.format.js?
request.format.json?
# etc.

answered Apr 18 '19 at 23:02

localhostdotdev

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I can't find any documentation on the available types or how they are built. Do you know where this is defined? – estani Aug 17 '20 at 12:24

How to tell which format a controller has resolved to render

2 Answers2