creating a button/link with Json params

问题

I got this in a controller:

def create
if save
respond_to do |format|
     format.html { render "crop" }
     format.json { render json: @user, status: :updated, location: @user, notice: "updated" }
end
end 

The above respond_to will render .com/user/:id (users/crop.html.erb)

Instead of rendering crop.html.erb after create method, I need a link which would take user to the same page.

<%=link_to "crop", render "crop", render json: @user, location: @user %> <- don't know whow to write this one. 

Would anyone be so kind to educate me ? :) please

来源：https://stackoverflow.com/questions/25335140/creating-a-button-link-with-json-params