Hi Mike, thanks for your advice. In answer: 1) The JSON is valid (it was generated using rails .to_json method and that site you recommended says it's valid)
2) I'm pretty sure a JSON download will work with JS/jQuery, because the async treeview example uses a php script to return some json - see http://jquery.bassistance.de/treeview/demo/async.html, look at the 'server component used' to see the php in question. 3) See 2. I'm confident that the json/jquery side of things is all cool. My problem is purely rails-specific: how do i ask a rails controller for a specific chunk of json, and how do i send it back? Or, in other words, how do i manage in rails what the example uses a php script for? thanks again On May 7, 4:57 pm, "Michael Geary" <[EMAIL PROTECTED]> wrote: > It sounds like you're trying to debug three things at once: > > * Can I generate valid JSON from myRailsapp? > > * Can I get a JSON download to work with JavaScript and jQuery? > > * Can I getasyncJSON to work withtreeview? > > I would simplfy the debugging problem by separating those three questions > and tackling them one at a time. That will make it a lot easier to track > down the problem. > > For example, you can test the first one all by itself by generating your > JSON data and simply copying and pasting it intowww.jsonlint.comto see if > it accepts it. That way you don't even have to think about JavaScript at > all; you are simply debugging yourRailsapp. > > Once you know you have good JSON data, you can test question #2 with a > simple test case that just downloads the JSON data with jQuery and displays > it (even with just a console.log call). > > Finally, with all that working, you can tackle thetreeviewquestion. > > -Mike > > > From: Max Williams (Brighton) > > > Hi - first of all this is a plugin-specific question (abouttreeview) > > - i sent it to the plugin discussion page but it seems pretty > > dead (no posts for over a year), so i'm sending it here as > > well. If anyone could help me out that would be fantastic. > > > I've been usingtreeviewand have no problems with it so far. > > However, to get better performance i'm now trying to switch > > to the asynchronous version: > >http://jquery.bassistance.de/treeview/demo/async.html > > > In the example they use php to return some json to the tree, > > but i'm using it in a ruby onrailsapp, and can;t work out > > how to get it to work. Can anyone help? I'm really just not > > sure how to get the required json for the update back to thetreeview. > > > This is what i'm doing at the moment: > > > In the view: > > > jQuery(document).ready(function(){ > > jQuery("#prop-tree").treeview({ > > url: "tree/self_and_children" > > }); > > }); > > > ... > > <ul id="prop-tree"> > > </ul> > > > The url "tree/self_and_children" does seem to be calling the > > correct controller and action, which is as follows: > > > def self_and_children > > # expects the id of the branch which is clicked on, which > > will be something like > > # "property_id_79". We want property with id 79. > > if params[:id] > > property = Property.find(params[:id].split("_").last) > > else > > property = Property.root > > end > > > @json = property.self_and_children_to_json > > respond_to do |format| > > if @json > > #should never get an html request for this > > format.html { render :text => @json } > > format.xml { head :ok } > > format.js { render :text => @json } > > else > > format.html { } > > format.xml { render :xml => @json.errors, :status => > > :unprocessable_entity } > > format.js > > end > > end > > end > > > But, nothing comes back - at least, the tree doesn't change. > > My questions are as follows: > > > a) is doing "render :text => @json" the proper way to send > > back the chunk of json totreeview? Should i do something in > > a js.rjs file instead? > > b) how do i send through the id of the clicked-on branch to > > the controller? (and retrieve it in the controller) > > > thanks in advance > > max
