jquery - jsTree unable to load root nodes from AJAX call

Question

I am not able to load the initial root nodes using jsTree below: the data is on a server and has to be 'bought in' via AJAX for each node selected. I also want to use a checkbox and get value of all parent nodes of a selected node.

main issue right now is: I am not able to list the root nodes....

//jsTree
    $('#testTree').jstree({
        'core' : {    
            'data' : {    
                'url' : function (node) {    
                    return node.id === '#' ?    
                    '/cgi-bin/test.pl'  //url for root nodes    
                    '/cgi-bin/test.pl?nodes-in-selected-heirarchy'; //url for children nodes    
            },    
                'data' : function (node) {    
                    console.log('node.id='+node.id);    
                    return { 'id' : node.id };    
                }    
            }    
        }    
    });

all that this shows is a folder icon.

the JSON I am getting from the server is:

{"5":"summer","8":"vacation","2":"2015","3":"2014","4":"2013","6":"winter","1":"2016","7":"birthday"}

It is in a key:value, format.

Here is a new modified code: even this does not work ...

$('#test').jstree({
    'core': {
        'data':{                                //this is the data provided to the jsTree to draw the tree.
            'url': function( node ){
                if( node.id === '#' ){
                    console.log('1');
                    return "/cgi-bin/test.pl";
                } else {
                    console.log('2');
                    return "/cgi-bin/test.pl?jsTreeParentKey=" + node.data( "key" );
                }
            },
            'data': function(node) {            //the data sent to the server
                console.log('node.id='+node.id);
                return {
                    'id': node.id,
                    'xyz': 'value_xyz'          //extra set of param=value sent to server
                };
            },
            'success': function (retData) {
                data = [];
                for( indx in retData ){
                    var value = retData[indx]
                    console.log('indx=i'+indx+', value='+value);
                    node = {
                        'id' : 'i'+indx,
                        'text' : value,
                        'icon' : '/',
                        //'metadata' :  value,
                        'state' : {'opened' : false}                //'state' : 'closed'
                    }
                    data.push( node );
                }
                return data;
            }
            // "check_callback" : true                    
        }
    },
    "checkbox" : {
        "keep_selected_style" : false
    },
    "plugins" : [ "checkbox","json_data" ]
});

I get this in log:

1  <---- from URL
node.id=# <----from param sent

indx=i1, value=2016
indx=i2, value=2015
indx=i3, value=2014
indx=i4, value=2013
indx=i5, value=summer
indx=i6, value=winter
indx=i7, value=birthday
indx=i8, value=vacation

Answer 1

Your data format (the JSON you return from the server) is not in the required jsTree format. At least include a text property on each of your nodes.

Here are the detailed docs:
https://github.com/vakata/jstree#the-required-json-format