Converting URL to JSON version?

问题

On all the pages of my app, I want a link to the JSON version of current page. Any neat tricks to do this? Where it got complicated was when additional '&' parameters were included in the URL.

So the urls would be transposed as:

'/users' => '/users.json'

'/users?page=1&per_page=5' => '/users.json?page=1&per_page=5'

回答1:

try this :

polymorphic_path( @user, :format => :json )

(as seen in this API doc)

alternatively :

user_path( :id => @user.id, :format => :json )

回答2:

Attribution for this answer from Get url for current page, but with a different format, with modifications:

Helper:

def current_url(new_params)
 url_for params.merge(new_params)
end

Link:

<%= link_to "JSON of this page", current_url(:format=>:json)

来源：https://stackoverflow.com/questions/8494255/converting-url-to-json-version