I’m trying to set up a nested menu strucutre using RJS
I want to be click on an item, have not have the whole page refresh but
just have the menu
refreshed
1 - my model is using :acts_as_tree
2 - in my controller I have the following… it’s just a barebones start
at being able to dig DOWN through the chilren
def renderMenu
render :update do |page|
page.replace_html “Selection”, :partial => ‘selection’,
:collection => Program.find(params[:id]).children
end
end
3- my :partial => ‘selection’ is the following “_selection.rhtml” file
<%= link_to_remote selection.name, :update => "Selection", :url =>
{:action => :renderMenu, :id => selection.id} %>
4- my layout provides the following strucutre:
<%= render :partial => 'selection', :collection =>
@menu[:BreadCrumb][-1].children %>
-------anyways 
so this is hte problem i’m having:
it sort of works but I think i’m getting a prototype error…when I
click on a parent element to see its children, I get a mix of what I
want and an error message…all mixed up
try { Element.update(“Selection”, "
"); } catch (e) { alert(‘RJS error:\n\n’ + e.toString());
alert(‘Element.update(“Selection”, "
");’); throw e }
any suggestions?
Andrew G. wrote:
try { Element.update(“Selection”, "
"); } catch (e) { alert(‘RJS error:\n\n’ + e.toString());
alert(‘Element.update(“Selection”, "
");’); throw e }
That try/catch stuff is just there for RJS debugging. So that when some
javascript error occurrs you will get an alert with the details of the
error.
But is the javascript actually executing? or is it just showing up on
the page as text? If it’s showing up as text you need to set:
@headers[‘Content-Type’] = ‘text/javascript’
Although if you use “render :update” that should be done for you. Get
the Firebug extension for Firefox so you can examine the headers and
content of the response to your ajax calls. It should help you figure
out whats going on.
the javascript is executing…the child elements are apeparing…but
they’re being around by the javascript error handling output
Alex W. wrote:
Andrew G. wrote:
try { Element.update(“Selection”, "
"); } catch (e) { alert(‘RJS error:\n\n’ + e.toString());
alert(‘Element.update(“Selection”, "
");’); throw e }
That try/catch stuff is just there for RJS debugging. So that when some
javascript error occurrs you will get an alert with the details of the
error.
But is the javascript actually executing? or is it just showing up on
the page as text? If it’s showing up as text you need to set:
@headers[‘Content-Type’] = ‘text/javascript’
Although if you use “render :update” that should be done for you. Get
the Firebug extension for Firefox so you can examine the headers and
content of the response to your ajax calls. It should help you figure
out whats going on.
AAAAh… thanks 
the :update did the trick
Michael T. wrote:
a couple of things. First you’re not just updating the
, you’re
updating the whole ordered lists. In your partial you don’t need the
:update symbol in there. Finally, like the other poster said, get
Firebug. Turn on the Options >> ShowXHTMLRequests. View your Console
and look at the Request as well as the Response. I suspect you’ll
find the problem.
Michael
a couple of things. First you’re not just updating the
, you’re
updating the whole ordered lists. In your partial you don’t need the
:update symbol in there. Finally, like the other poster said, get
Firebug. Turn on the Options >> ShowXHTMLRequests. View your Console
and look at the Request as well as the Response. I suspect you’ll
find the problem.
Michael
so this is hte problem i’m having: