Rails Routes - Limiting the available formats for a resource

问题

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 to specify that only the JS format routes be created?

回答1:

You just add constraints about format :

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

回答2:

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

回答3:

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

回答4:

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

回答5:

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

回答6:

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

来源：https://stackoverflow.com/questions/3679200/rails-routes-limiting-the-available-formats-for-a-resource

标签

ruby-on-rails

routing

routes