Rails Routes - Limiting the available formats for a resource

Question

I have a series of resources that I want only available if accessed via the JS format. Rails\' route resources gives me the formats plus the standard HTML. Is there a way

Answer 1

None of the above solutions worked for me. I ended up going with this solution:

post "/test/suggestions", to: "test#suggestions", :constraints => -> (req) { req.xhr? }

Found on https://railsadventures.wordpress.com/2012/10/07/routing-only-ajax-requests-in-ror/#comment-375

Answer 2

You just add constraints about format :

resources :photos, :constraints => {:format => /(js|json)/}

Answer 3

how about

# routes.rb

class OnlyAjaxRequest
  def matches?(request)
    request.xhr?
  end
end

post "/test/suggestions", to: "test#suggestions", :constraints => OnlyAjaxRequest.new

it doesn't get to the controller at all. Taken from railsadventures

Answer 4

If you need not only one or another than json (cant use #xhr?) I offer to you option below

resource :offers, only: :show, format: true, constraints: { format: 'pdf' }

Hope it helps

Answer 5

You can use a before_filter that raises a routing error unless the request format is MIME::JS.

app/controllers/application_controller.rb:

class ApplicationController < ActionController::Base
  before_filter :check_js

  private
    def check_js
      raise RoutingError.new('expected application/json') unless request.format == MIME::JS
    end
end

Apply this filter more surgically with :only, :except, and :skip_before_filter as covered in the rails Action Controller Guide

Answer 6

You must wrap those routes in a scope. Constraints unfortunately don't work as expected in this case.

This is an example of such a block...

scope :format => true, :constraints => { :format => 'json' } do
  get '/bar' => "bar#index_with_json"
end

More information can be found here: https://github.com/rails/rails/issues/5548