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Convert complex JSON to flat JSON and assign it to the pivot table in EJ2 TypeScript Pivotview control
8 Aug 202322 minutes to read
By default, flat JSON can only bind to the pivot table. However, you can connect complex JSON to the pivot table by converting it to flat JSON via code-behind and binding it to the pivot table using the dataSource property in the load event.
In the following example, the complexToFlatJson() method is used to convert complex JSON to flat JSON and bind it to the pivot table using the dataSource property, then modifying the field names in the rows and columns based on the converted flat JSON under dataSourceSettings in the load event.
import { PivotView, FieldList, LoadEventArgs } from '@syncfusion/ej2-pivotview';
import { enableRipple } from '@syncfusion/ej2-base';
enableRipple(false);
PivotView.Inject(FieldList);
let parentProp: any = {};
let dataSource: Object[][];
let pivotGridObj: PivotView = new PivotView({
dataSourceSettings: {
expandAll: true,
enableSorting: true,
dataSource: data() as any,
columns: [{ name: 'OrderDetails' }],
values: [{ name: 'Freight', caption: 'Units Sold' }],
rows: [{ name: 'ShipDetails' }],
valueSortSettings: { headerDelimiter: ' - ' },
formatSettings: [{ name: 'Amount', format: 'C0' }]
},
load: function (args: LoadEventArgs) {
dataSource = JSON.parse(JSON.stringify(args.dataSourceSettings.dataSource));
args.dataSourceSettings.dataSource = complexToFlatJson(dataSource);
let rows: any = [];
for (let i: number = 0; i < args.dataSourceSettings.rows.length; i++) {
if (args.dataSourceSettings.rows[i].name in parentProp) {
rows = rows.concat(parentProp[args.dataSourceSettings.rows[i].name]);
} else {
rows.push(args.dataSourceSettings.rows[i]);
}
}
args.dataSourceSettings.rows = rows;
let columns: any = [];
for (let i: number = 0; i < args.dataSourceSettings.columns.length; i++) {
if (args.dataSourceSettings.columns[i].name in parentProp) {
columns = columns.concat(
parentProp[args.dataSourceSettings.columns[i].name]
);
} else {
columns.push(args.dataSourceSettings.columns[i]);
}
}
args.dataSourceSettings.columns = columns;
},
showFieldList: true,
width: '100%',
height: 500,
gridSettings: { columnWidth: 140 },
});
pivotGridObj.appendTo('#PivotTable');
function complexToFlatJson(data: Object[][]) {
let flatArray: any = [];
let flatObject: any = {};
for (let index = 0; index < data.length; index++) {
for (let prop in data[index]) {
let value: Object = data[index][prop];
if (Array.isArray(value)) {
for (let i: number = 0; i < value.length; i++) {
let childProp: any = [];
for (let inProp in value[i]) {
flatObject[inProp] = value[i][inProp];
let object = {
name: inProp,
};
childProp.push(object);
}
parentProp[prop] = childProp;
}
} else {
flatObject[prop] = value;
}
}
flatArray.push(flatObject);
flatObject = {};
}
return flatArray;
}
function data() {
return [
{
CustomerID: 'VINET',
Freight: 32.38,
OrderDetails: [
{
OrderID: 10248,
OrderDate: '1996-07-04T10:10:00.000Z',
}
],
ShipDetails: [
{
ShipName: 'Vins et alcools Chevalier',
ShipAddress: "59 rue de l'Abbaye",
ShipCity: 'Reims',
ShipRegion: null,
ShipCountry: 'France',
ShippedDate: '1996-07-16T12:20:00.000Z',
}
]
},
{
CustomerID: 'GALED',
Freight: 10.14,
OrderDetails: [
{
OrderID: 10366,
OrderDate: '1996-11-28T00:00:00.000Z',
}
],
ShipDetails: [
{
ShippedDate: '1996-12-30T00:00:00.000Z',
ShipName: 'Galería del gastronómo',
ShipAddress: 'Rambla de Cataluña, 23',
ShipCity: 'Barcelona',
ShipRegion: null,
ShipCountry: 'Spain',
}
]
},
{
CustomerID: 'VAFFE',
Freight: 13.55,
OrderDetails: [
{
OrderID: 10367,
OrderDate: '1996-12-02T00:00:00.000Z',
}
],
ShipDetails: [
{
ShippedDate: '1996-12-30T00:00:00.000Z',
ShipName: 'Vaffeljernet',
ShipAddress: 'Smagsloget 45',
ShipCity: 'Århus',
ShipRegion: null,
ShipCountry: 'Denmark',
}
]
},
{
CustomerID: 'ERNSH',
Freight: 101.95,
OrderDetails: [
{
OrderID: 10368,
OrderDate: '1996-11-29T00:00:00.000Z',
}
],
ShipDetails: [
{
ShippedDate: '1996-12-30T00:00:00.000Z',
ShipName: 'Ernst Handel',
ShipAddress: 'Kirchgasse 6',
ShipCity: 'Graz',
ShipRegion: null,
ShipCountry: 'Austria',
}
]
},
{
CustomerID: 'SPLIR',
Freight: 195.68,
OrderDetails: [
{
OrderID: 10369,
OrderDate: '1996-11-28T00:00:00.000Z',
}
],
ShipDetails: [
{
ShippedDate: '1996-12-30T00:00:00.000Z',
ShipName: 'Split Rail Beer & Ale',
ShipAddress: 'P.O. Box 555',
ShipCity: 'Lander',
ShipRegion: 'WY',
ShipCountry: 'USA',
},
]
}
];
}<!DOCTYPE html>
<html lang="en">
<head>
<title>EJ2 Pivot Grid</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="Typescript Pivot Grid Control" />
<meta name="author" content="Syncfusion" />
<link href="index.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-base/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-buttons/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-calendars/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-dropdowns/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-grids/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-charts/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-inputs/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-lists/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-navigations/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-popups/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-pivotview/styles/material.css" rel="stylesheet" />
<link href="https://cdn.syncfusion.com/ej2/29.1.33/ej2-splitbuttons/styles/material.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" />
<script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body>
<div id='loader'>Loading....</div>
<div id='container'>
<div>
<div id='PivotTable'></div>
</div>
</div>
</body>
</html>