Element.update is not a function [Rails 3 + JQuery]

问题

I'm attempting to integrate JQuery into Rails 3. I've downloaded the rails.js file from http://github.com/rails/jquery-ujs and have included it in my app. I've also include JQuery.

But when I attempt to do a simple page.replace like so:

render :update do |page|
  page.replace_html "my_div", :partial => "my_partial", :locals => {:mylocal => mylocal}
end

I get the following error thrown from the javascript executing:

RJS error:
TypeError: Element.update is not a function

Element.update("my_div", "mypartialdata");

Any ideas?

回答1:

As others have said, page.replace, in rails 2, references Element.update.

If you want the same helpers available to you in Rails 3 with jQuery, check out jrails:

http://github.com/aaronchi/jrails

In case you want to use the assert_select_rjs test helpers in Rails 3, go grab the patched version here:

https://github.com/theworkinggroup/jrails

回答2:

page.replace will call prototype function Element.update. Have you got prototype included in your page?

回答3:

If it really is just the Element.update thing using render(:update) in rails 3 with jQuery, this little js code snippet should do it:

Element = function(){}
Element.update = function(id,html){$('#'+id).html(html);}

parsing this JS code should help. I've put it at the end of the jquery_ujs.js file.

回答4:

I figured out the problem. Apparently with JQuery, you cannot use the rails helpers like "replace_html" or "insert_html". You merely have to do page << "//Jquery code".

来源：https://stackoverflow.com/questions/3596431/element-update-is-not-a-function-rails-3-jquery