Datasource issue when getting JSON Adjacency List

[axwack]

I have data stored for the Treelist as an adjacency list in the database. I call the data using JSON and then, per the instructions in the documentation, I use the schema.parse function to then convert a nested JSON to a flat array. 

The first value comes out and displays in the tree. When I click to get the child, nothing shows. The object structure is the same as the parent.

 Here is the code:

JSON OF PARENT

{"id": 26, "tgtWeight": 0.0, "currWeight": 0.0, "hasChildnode": true, "ext_model_id": 8, "parent": null, "SSM": {"id": 8, "securitySelectionModelName": "ssm8", "userCreatedModel": "[{\"classificationName\":\"ssm8\",\"id\":8,\"hasChildNode\":true,\"child\":[{\"classificationName\":\"MBS\",\"id\":14,\"hasChildNode\":true,\"child\":[{\"classificationName\":\"Common Stock\",\"id\":15,\"hasChildNode\":false}]}]}]", "classificationNames": []}, "classificationNameNode": null}

 JSON OF CHILD


[{"id": 27, "tgtWeight": 0.0, "currWeight": 0.0, "hasChildnode": true, "ext_model_id": 14, "parent": {"id": 26, "tgtWeight": 0.0, "currWeight": 0.0, "hasChildnode": true, "ext_model_id": 8, "parent": null, "SSM": 8, "classificationNameNode": null}, "SSM": {"id": 8, "securitySelectionModelName": "ssm8", "userCreatedModel": "[{\"classificationName\":\"ssm8\",\"id\":8,\"hasChildNode\":true,\"child\":[{\"classificationName\":\"MBS\",\"id\":14,\"hasChildNode\":true,\"child\":[{\"classificationName\":\"Common Stock\",\"id\":15,\"hasChildNode\":false}]}]}]", "classificationNames": []}, "classificationNameNode": {"id": 14, "classificationLevel": 2, "classificationName": "MBS", "hasChildNode": false, "parent": 2}}]

These get converted into a JAVASCRIPT OBJECT in the schema.parse.

 

JAVASCRIPT

01.$(document).ready(function () {
02.    var id = {{ id }};
03.
04.    var dataSource = new kendo.data.TreeListDataSource({
05.        transport: {
06.            read: {
07.                url: "../getModelTargetWeights?SSM_id="+id,
08.                dataType: "json"
09.            }
10.        },
11.        schema: {
12.            parse: function(response) {
13.                NodeArray=[];
14.                if (response.length == undefined) {
15.
16.                var node = {
17.                    id: response.id,
18.                    currWeight: response.currWeight,
19.                    tgtWeight: response.tgtWeight,
20.                    hasChildren: response.hasChildnode,
21.                    parentId: response.parent,
22.                    ext_model_id: response.ext_model_id,
23.                    securitySelectionModelName: response.SSM.securitySelectionModelName,
24.                    classificationNameNode: response.classificationNameNode
25.                };
26.                     NodeArray.push(node);
27.            } else {
28.                    for (var i=0; i < response.length; i++){
29.                        var node = {
30.                            id: response[i].id,
31.                            currWeight: response[i].currWeight,
32.                            tgtWeight: response[i].tgtWeight,
33.                            hasChildren: response[i].hasChildnode,
34.                            parentId: response[i].parent.ext_model_id,
35.                            ext_model_id: response[i].ext_model_id,
36.                            securitySelectionModelName: response[i].SSM.securitySelectionModelName,
37.                            classificationNameNode: response[i].classificationNameNode.classificationName
38.                        }
39.                        NodeArray.push(node);
40.                    }
41.            }
42.
43.                return NodeArray;
44.           },
45.           model: {
46.                id: "id",
47.                parentId: "parentId",
48.                fields: {
49.                           parentId: { field: "parentId", nullable: true },
50.                           securitySelectionModelName: "securitySelectionModelName",
51.                           classificationNameNode: "classificationNameNode",
52.                           tgtWeight: { field: "tgtWeight", nullable: true },
53.                           hasChildren: { type: "boolean", field: "hasChildren" }
54.                }
55.            }
56.         }
57.    });
58.
59.   $("#treeList").kendoTreeList({
60.        dataSource: dataSource,
61.        editable: true,
62.        height: 540,
63.        columns: [
64.                    { field: "securitySelectionModelName", title: "Model Name" },
65.                    { field: "classificationNameNode", title: "Classification" },
66.                    { field: "tgtWeight", title: "Target" }
67.         ],
68.   });
69.     dataSource.read();
70.    });
71.</script>

 

 

[axwack]

THIS IS THE NEWER CODE


$(document).ready(function () {
        var id = {{ id }};

        var dataSource = new kendo.data.TreeListDataSource({
            transport: {
                read: {
                    url: "../getModelTargetWeights?SSM_id="+id,
                    dataType: "json"
                }
            },
            schema: {
                parse: function(response) {
                    NodeArray=[];
                    if (response.length == undefined) {

                        var node = {
                            id: response.id,
                            currWeight: response.currWeight,
                            tgtWeight: response.tgtWeight,
                            hasChildren: response.hasChildnode,
                            parentId: response.parent,
                            ext_model_id: response.ext_model_id,
                            securitySelectionModelName: response.SSM.securitySelectionModelName,
                            classificationNameNode: response.classificationNameNode,

                        };
                         NodeArray.push(node);
                    } else {
                            for (var i=0; i < response.length; i++){
                                var node = {
                                    id: response[i].id,
                                    currWeight: response[i].currWeight,
                                    tgtWeight: response[i].tgtWeight,
                                    hasChildren: response[i].hasChildnode,
                                    parentId: response[i].parent.ext_model_id,
                                    ext_model_id: response[i].ext_model_id,
                                    securitySelectionModelName: response[i].SSM.securitySelectionModelName,
                                    classificationNameNode: response[i].classificationNameNode.classificationName
                                }
                                NodeArray.push(node);
                            }
                    }
                        console.log(NodeArray);
                        return NodeArray;
               },
                model: {
                    id: "id",
                    parentId: "parentId",
                    hasChildren: false,
                    fields: {
                               id: { type: "number", nullable: false},
                               parentId: {  field: "parentId", type:"number", defaultValue: null },
                               hasChildren: {type: "boolean", field: "hasChildren"}
                    }
                }
             }
        });

       $("#treeList").kendoTreeList({
            dataSource: dataSource,
            editable: true,
            height: 540,
            editable: true,
            columns: [
                        { field: "securitySelectionModelName", title: "Model Name",expandable: true },
                        { field: "classificationNameNode", title: "Classification" },
                        { field: "tgtWeight", title: "Target" }
             ],
       });

        });
    </script>

[quote]Your quote goes here[/quote]

[Nikolay Rusev]

Hello Vincent,

 

The reason for not showing child items is that the child item, parentId field `parent.ext_model_id` has value of 8 and there isnt' parent item with such id field. 

 

If I change the above field to 26 it will be rendered in the TreeList as there is such parent.

 

Example - http://dojo.telerik.com/@rusev/iNiwI

 

Regards,
Nikolay Rusev
Telerik

 

 

[axwack]

Nikolay, thank you for pointing out that I'm an idiot!! :)