How to return HTTP 204 in a Rails controller

Question

This seems to be basic but I'm a Ruby/Rails beginner. I need to simply return HTTP 204 in a controller. Would

respond_to do |format|   format.html   end 

return a 204?

Answer 1

head :no_content 

Tested with Rails 3.2.x, 4.x. It causes the controller method to respond with the 204 No Content HTTP status code.

An example of using this inside a controller method named foobar:

def foobar   head :no_content end 

Answer 2

Look at the head method:

Return a response that has no content (merely headers). The options argument is interpreted to be a hash of header names and values.