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I am trying to create an accordion from the JSON data.
I am calling the GET request from json-server and successfully able to call the API.
I am not able to access the properties of the children in the variable tileData which shows the error:
Property 'children' does not exist on type 'Tile[]'.
Not sure where I am going wrong.
tileData!: Tile[];
getTileData() {
this.tileService.showTile().subscribe((data: any) => {
this.tileData = data;
console.log('this.tileData.children.name :>> ', this.tileData.children.name ); //Shows error
});
}
The function in service file is
showTile() {
return this.http.get<Tile[]>('http://localhost:3000/data');
}
I have created an interface to store the obtained JSON data which is shown below:
export interface Tile {
name: string;
image: string;
children: { name: string; image: string; url: string };
}
My JSON data received as follows:
{
"data": [
{
"name": "First",
"image": "https://img.freepik.com/free-vector/football-2022-tournament-cup-background_206725-604.jpg?size=626&ext=jpg",
"children": [
{
"name": "Firstone",
"image": "https://img.freepik.com/free-vector/hand-painted-watercolor-abstract-watercolor-background_23-2149005675.jpg?size=626&ext=jpg",
"url": "http://www.google.com"
},
{
"name": "Firsttwo",
"image": "https://img.freepik.com/free-vector/hand-painted-watercolor-abstract-watercolor-background_23-2149005675.jpg?size=626&ext=jpg",
"url": "http://www.google.com"
},
{
"name": "Firstthree",
"image": "https://img.freepik.com/free-vector/hand-painted-watercolor-abstract-watercolor-background_23-2149005675.jpg?size=626&ext=jpg",
"url": "http://www.google.com"
}
]
},
{
"name": "Second",
"image": "https://img.freepik.com/free-vector/football-2022-tournament-cup-background_206725-604.jpg?size=626&ext=jpg",
"children": [
{
"name": "Secondone",
"image": "https://img.freepik.com/free-vector/hand-painted-watercolor-abstract-watercolor-background_23-2149005675.jpg?size=626&ext=jpg",
"url": "http://www.google.com"
},
{
"name": "Secondtwo",
"image": "https://img.freepik.com/free-vector/hand-painted-watercolor-abstract-watercolor-background_23-2149005675.jpg?size=626&ext=jpg",
"url": "http://www.google.com"
},
{
"name": "Secondthree",
"image": "https://img.freepik.com/free-vector/hand-painted-watercolor-abstract-watercolor-background_23-2149005675.jpg?size=626&ext=jpg",
"url": "http://www.google.com"
}
]
}
]
}
Issue 1
Your JSON response was an object containing the data property with Tile[].
Use map from rxjs to return as Observable<Tile[]>.
import { map } from 'rxjs';
showTile() : Observable<Tile[]> {
return this.http.get<any>('http://localhost:3000/data')
.pipe(map((response: any) => response.data));
}
Issue 2
While the children property is an array but not an object.
export interface Tile {
name: string;
image: string;
children: { name: string; image: string; url: string }[];
}
Issue 3
To print out the name, you need to iterate titleData and iterate children array from each title object.
getTileData() {
this.tileService.showTile().subscribe((data: any) => {
this.tileData = data;
for (let title of this.tileData) {
for (let child of title.children) {
console.log('title.children.name :>> ', child.name);
}
}
});
}
Demo # StackBlitz
You haven't mentioned the error but, the interface definition should use exact name as you have in data.
try
export interface Tile {
name: string;
image: string;
children: { name: string; image: string; url: string };
}
Im trying to map JSON Data to show it in a Bar-Chart. The final Array I need has to look like this:[883, 5925, 17119, 27114, 2758].
Actually, the Array I want to use to set the barChartData (dringlichkeitenValues[])seems to be empty. Sorry for my bad coding skills. Can anyone show me how to solve this Problem?
JSON:
[{
"id": 1,
"value": 883
},
{
"id": 2,
"value": 5925
},
{
"id": 3,
"value": 17119
},
{
"id": 4,
"value": 27144
},
{
"id": 5,
"value": 2758
}]
api.service.ts
getDringlichkeiten(): Observable<IDringlichkeit[]> {
return this.http.get<IDringlichkeit[]>(this.ROOT_URL + '/aufenthalte/dringlichkeit');}
dringlichkeit.ts
export interface IDringlichkeit {
id: number;
value: number;
}
bar-chart.component.ts
export class BarChartComponent implements OnInit {
public dringlichkeitValues:number[] = [];
public dringlichkeiten: IDringlichkeit[];
public barChartLabels:String[] = ["1", "2", "3", "4", "5"];
public barChartData:number[] = this.dringlichkeitValues;
public barChartType:string = 'bar';
constructor(private aufenthaltService: AufenthaltService) {
}
ngOnInit() {
this.loadData();
this.getDringlichkeitValues();
}
loadData(){
this.aufenthaltService.getDringlichkeiten()
.subscribe( data => this.dringlichkeiten = data);
}
getDringlichkeitValues(){
let dringlichkeitValues:number[]=[];
this.dringlichkeiten.forEach(dringlichkeit=>{
dringlichkeitValues.push(dringlichkeit.value)
this.dringlichkeitValues = dringlichkeitValues;
});
return this.dringlichkeitValues;
}
}
UPDATE:
I updated my component but now my Array is still empty after subscribing to the Observable.
bar-chart.component.ts
chart: Chart;
dringlichkeiten: IDringlichkeit[] = [];
constructor(private aufenthaltService: AufenthaltService) {
}
ngOnInit() {
this.aufenthaltService.getDringlichkeiten()
.subscribe( data => {
this.dringlichkeiten = data;
//dringlichkeiten-Array full
console.log(this.dringlichkeiten);
});
//dringlichkeiten-Array empty
console.log(this.dringlichkeiten);
this.chart = new Chart('canvas', {
type: 'bar',
data: {
labels: this.dringlichkeiten.map(x => x.id),
datasets: [
{
label: 'Dringlichkeiten',
data: this.dringlichkeiten.map(x => x.value),
backgroundColor: ['#FF6384', '#4BC0C0', '#FFCE56', '#E7E9ED', '#36A2EB']
}
]
},
});
}
To get the "values" from your JSON array, you can use:
dringlichkeiten.map(x => x.value)
This will get you an array you require, i.e.:
[883, 5925, 17119, 27114, 2758]
You can then pass this array to chartJS for it to render you a chart like so:
this.chart = new Chart('canvas', {
type: 'bar',
data: {
labels: dringlichkeiten.map(x => x.id),
datasets: [
{
label: 'My Bar Chart',
data: dringlichkeiten.map(x => x.value),
backgroundColor: ['red', 'green', 'yellow', 'blue', 'orange']
}
]
},
});
Take a look at this simplified working SlackBlitz example.
Hope this helps!
I have successfully set up several KendoUI Grids, but I cannot get one using server-side paging to work.
I modified my rest service so I will return a total value (hard coded right now).
I also modified my javascript source. [see below].
Usually I just get a blank screen.
Would be very grateful for any assistance.
Script:
$(document).ready(function(){
// Setup Rest Service
var loc = ( location.href );
var url = loc.substring( 0, loc.lastIndexOf( "/" ) ) + "/xpRest.xsp/test/";
dataSource = new kendo.data.DataSource({
pageSize: 20,
serverPaging: true,
serverFiltering: true,
serverSorting: true, transport : {
read : {
url : url + "READ",
dataType : "json"
},
type : "READ"
},
schema : {
total: "total",
model : {
id : "unid",
fields : {
unid : {
type : "string",
nullable : false
},
tckNbr : {
type : "string",
editable : false
},
tckSts : {
type : "string",
editable : false
}
}
}
}
});
grid = $("#grid-databound-dataItem").kendoGrid({
dataSource : dataSource,
height: 550,
filterable: true,
sortable: true,
pageable: true,
columns : [
{field : "tckNbr", title : "Number", type: "string"},
{field : "tckSts", title : "Status", type: "string"}
]
}).data("kendoGrid");
});
JSON feed:
[
{
"total":100,
"data":
[
{
"tckNbr":"3031",
"tckSts":"1 Not Assigned",
"unid":"0014DA9095BF6D638625810700597A36",
"tckReqs":"Bryan S Schmiedeler",
"tckNts":
[
"Bryan DeBaun"
],
"tckBUs":
[
"NAP\/IFI"
],
"tckApps":"GTM",
"tckType":"Issue",
"tckPriority":"Medium"
},
{
"tckNbr":"3031",
"tckSts":"1 Not Assigned",
"unid":"00598976D88226D2862581070059AD25",
"tckReqs":"Bryan S Schmiedeler",
"tckNts":
[
"Bryan DeBaun"
],
"tckBUs":
[
"NAP\/IFI"
],
"tckApps":"GTM",
"tckType":"Issue",
"tckPriority":"Medium"
}
]
}
]
Correct your JSON feed, you need to return object not array:
{
"total": 10,
"data": []
}
After that say what is data and what is total in you schema:
schema : {
total: "total",
data: "data",
.
.
}
Note: if you mock data like in your case (total: 100, data -> size is 2) your paginatio will be created by total parameter not data itself. You will see 5 pages with same data (that is ok).
I'm using OData v4 with Web API to communicate with my AngularJS web application.
More specifically I'm trying to display my data using Kendo UI Grid.
My problem is, that my Web API does not return the correct metadata, resulting in Kendos datasource not being able to display the data.
I'm doing paging, and to do that I need the "count" property in my response for Kendo UI Grid datasource to be able work properly.
The response I'm expecting the Web API should look something like this:
http://docs.oasis-open.org/odata/odata-json-format/v4.0/errata02/os/odata-json-format-v4.0-errata02-os-complete.html#_Toc403940644
However, the result I'm seeing in the response is:
{
"#odata.context":"http://localhost:1983/odata/$metadata#TestReports","value":[
{
"Id":1,"Name":"Test Testesen","Purpose":"Kendo UI Grid Test","Type":"Rumraket","ReportedDate":"2015-02-04T10:03:59.4173323+01:00"
},{
"Id":2,"Name":"Gunner Testesen","Purpose":"OData Web API Test","Type":"Sutsko","ReportedDate":"2015-02-04T10:03:59.4173323+01:00"
},{
"Id":3,"Name":"Bertram Didriksen","Purpose":"Server Paging Test","Type":"Flyver","ReportedDate":"2015-02-04T10:03:59.4173323+01:00"
},{
"Id":4,"Name":"Oluf Petersen","Purpose":"Test","Type":"B\u00e5d","ReportedDate":"2015-02-04T10:03:59.4173323+01:00"
},{
"Id":5,"Name":"Alfred Butler","Purpose":"Opvartning","Type":"Batmobil","ReportedDate":"2015-02-04T10:03:59.4173323+01:00"
}
]
}
My code for retrieving the data is:
$scope.pendingReports = {
dataSource: {
type: "odata",
transport: {
read: {
beforeSend: function (req) {
req.setRequestHeader('Accept', 'application/json;odata=fullmetadata');
},
url: "/odata/TestReports",
dataType: "odata"
},
parameterMap: function (options, type) {
var paramMap = kendo.data.transports.odata.parameterMap(options);
console.log(paramMap);
delete paramMap.$inlinecount; // <-- remove inlinecount parameter
delete paramMap.$format; // <-- remove format parameter
console.log(paramMap);
return paramMap;
}
},
schema: {
data: function (data) {
return data; // <-- The result is just the data, it doesn't need to be unpacked.
},
total: function (data) {
return data.length; // <-- The total items count is the data length, there is no .Count to unpack.
}
},
pageSize: 5,
serverPaging: true,
serverSorting: true
},
sortable: true,
pageable: true,
dataBound: function () {
this.expandRow(this.tbody.find("tr.k-master-row").first());
},
columns: [
{
field: "Name",
title: "Navn"
}, {
field: "ReportedDate",
title: "Indberetet den"
}, {
field: "Purpose",
title: "Formål"
}, {
field: "Type",
title: "Type"
}, {
field: "options",
title: "Muligheder"
}
]
};
My WebApiConfig class is corrently like this:
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
config.MapHttpAttributeRoutes();
config.Formatters.InsertRange(0, ODataMediaTypeFormatters.Create());
config.MapODataServiceRoute(
routeName: "odata",
routePrefix: "odata",
model: GetModel()
);
}
public static Microsoft.OData.Edm.IEdmModel GetModel()
{
ODataModelBuilder builder = new ODataConventionModelBuilder();
builder.EntitySet<TestReport>("TestReports");
return builder.GetEdmModel();
}
}
Does anyone have any suggestions on how I get the Web API to return the correct metadata?
Apparently Kendo UI Grid is not supporting OData v4.
The fix was to modify the parameterMap of the Kendo datasource, and tell it to use $count instead of $inlinecount.
Besides that I had to tell the schema to read "#odata.count" as the "total" value.
After I edited the before posted code to the ode below, I got the correct data in my response:
$scope.pendingReports = {
dataSource: {
type: "odata",
transport: {
read: {
beforeSend: function (req) {
req.setRequestHeader('Accept', 'application/json;odata=fullmetadata');
},
url: "/odata/TestReports",
dataType: "json"
},
parameterMap: function (options, type) {
var d = kendo.data.transports.odata.parameterMap(options);
delete d.$inlinecount; // <-- remove inlinecount parameter
d.$count = true;
return d;
}
},
schema: {
data: function (data) {
return data.value; // <-- The result is just the data, it doesn't need to be unpacked.
},
total: function (data) {
return data['#odata.count']; // <-- The total items count is the data length, there is no .Count to unpack.
}
},
pageSize: 5,
serverPaging: true,
serverSorting: true
},
sortable: true,
pageable: true,
dataBound: function () {
this.expandRow(this.tbody.find("tr.k-master-row").first());
},
columns: [
{
field: "Name",
title: "Navn"
}, {
field: "ReportedDate",
title: "Indberetet den"
}, {
field: "Purpose",
title: "Formål"
}, {
field: "Type",
title: "Type"
}, {
field: "options",
title: "Muligheder"
}
]
};
I have a php-script, which returns the following JSON
[
{
"Code":0,
"Message":"No problem"
},
{
"name":"o016561",
"status":1,
"locks":[
{
"ztn":"155320",
"dtn":"20131111",
"idn":"78"
},
{
"ztn":"155320",
"dtn":"20131111",
"idn":"91"
}
]
},
{
"name":"o011111",
"status":1,
"locks":[
{
"ztn":"155320",
"dtn":"20131111",
"idn":"91"
}
]
},
{
"name":"o019999",
"status":0,
"locks":[
]
},
{
"name":"o020000",
"status":0,
"locks":[
]
},
{
"name":"o020001",
"status":0,
"locks":[
]
}
]
Edit:
The grid should look something like this:
I've been able to load name and status into my grid - so far so good. But the more important part is, that I need the nested data in the locks-array being loaded into my grid, but I just can't get my code working. Any help would be appreciated.
I'm using ExtJS 4.2 if that matters.
Edit 2:
I tried
Ext.define("Locks", {
extend: 'Ext.data.Model',
fields: [
'ztn',
'dtn',
'idn'
]
});
Ext.define("ConnectionModel", {
extend: 'Ext.data.Model',
fields: ['name', 'status'],
hasMany: [{
model: 'Locks',
name: 'locks'
}]
});
var store = Ext.create('Ext.data.Store', {
model: "ConnectionModel",
autoLoad: true,
proxy: {
type: 'ajax',
reader: {
type: 'json',
root: 'name'
}
}
});
but it seemed to be wrong in multiple ways...
and it would be awesome if ztn and dtn could be displayed just seperated with a whitespace in the same column
You can add a renderer to the column. In that renderer you can do anything with the record...
Here's a working fiddle:
http://jsfiddle.net/Vandeplas/MWeGa/3/
Ext.create('Ext.grid.Panel', {
title: 'test',
store: store,
columns: [{
text: 'Name',
dataIndex: 'name'
}, {
text: 'Status',
dataIndex: 'status'
}, {
text: 'idn',
renderer: function (value, metaData, record, rowIdx, colIdx, store, view) {
values = [];
record.locks().each(function(lock){
values.push(lock.get('idn'));
});
return values.join('<br\>');
}
}, {
text: 'ztn + dtn',
renderer: function (value, metaData, record, rowIdx, colIdx, store, view) {
values = [];
record.locks().each(function(lock){
values.push(lock.get('ztn') + ' ' + lock.get('dtn'));
});
return values.join('<br\>');
}
}],
height: 200,
width: 600,
renderTo: Ext.getBody()
});
Note
If you have control over your backend you better change the form of your data more like this:
{
"code": 0,
"message": "No problem",
"success": true,
"data": [
{
"name": "o016561",
"status": 1,
"locks": [
{
"ztn": "155320",
"dtn": "20131111",
"idn": "78"
},
{
"ztn": "155320",
"dtn": "20131111",
"idn": "91"
}
]
},
{
"name": "o011111",
"status": 1,
"locks": [
{
"ztn": "155320",
"dtn": "20131111",
"idn": "91"
}
]
}
]
}
That way you don't mix your control data (success, message, code,...) with your data and the proxy picks it up correctly (it can be a cause of the problems your experiencing). I added a success boolean => Ext picks it up and goes to the failure handler. It helps a lot with your exception handling.
Here is the proxy for it:
proxy: {
type: 'ajax',
api: {
read: ___URL____
},
reader: {
type: 'json',
root: 'data',
messageProperty: 'message'
}
}