Question

I used Ajax POST to update a JSON object but when I tried to retrieve the JSON object simultaneously after that, it returned the old data of the JSON object.

How do I delete this old object and always retrieve the new one? This how the GET looks like:

http://localhost:8080/direct/forum_message/getListOfMessagesForSite/e81957d5-48db-49f3-a479-4077f13d1d6e.json?sakai.session=64d12629-ba76-4754-a353-7974b55e3356

In addition I want to have the ability to :

• send a message and update a msg list jSON object.
• Immediately call GET to retrieve the object with a new updated data.(the one with new added message).

here is POST method code :

this.sendMessage = function(params)
 {
    var url = baseURL+"/direct/forum_message/sendMessage";
    if(!params){
        params = {'sakai.session': sessionId, 'siteId': siteId, 'toolId':toolId};
    }
    else
    {
        params.sessionId = sessionId;
        params.siteId = siteId;
        params.toolId = toolId;
    }
    var ret = false;    
    var ajaxOptions = {
        url: url,
        data: params,
        type: "POST",
        traditional: true,
        async: false,
        complete: function(data){
            if(data.status == 0 || data.status == 200 || data.status == 201)
            {
                ret = $.parseJSON(data.responseText);
            }
        }
    };
    $.ajax(ajaxOptions);
    return ret;
 }

and GET method:

  this.getListOfMessagesForSite = function()
 {
    var url = baseURL+"/direct/forum_message/getListOfMessagesForSite/"+siteId+".json";             
    var params = (sessionId != "") ? {'sakai.session': sessionId} : null;
    var ret = null;
    var ajaxOptions = {
        url: url,
        data: params,
        type: "GET",
        dataType: "json",
        async: false,
        complete: function(data){
            if(data.status == 0 || data.status == 200 || data.status == 201)
            {
                ret = $.parseJSON(data.responseText);
            }
        }
    };
    $.ajax(ajaxOptions);
    return ret;
 }

Answer 1

My shot in the dark is the cache option:

cache Boolean
Default: true, false for dataType ‘script’ and ‘jsonp’

If set to false, it will force requested pages not to be cached by the
browser. Setting cache to false also appends a query string parameter,
"_=[TIMESTAMP]", to the URL.