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Use Edit Template in Foreign Key Column in JavaScript (ES5) Grid control

By default, the foreign key column uses the drop-down component for editing. You can render other than the drop-down component by using the column.edit property. The following example demonstrates the way of using edit template in the foreign column.

In the following code example, the Employee Name is a foreign key column. When editing, the AutoComplete component is rendered instead of drop-down list.

Source
Preview
index.js
index.html
var autoCompleteObj;
ej.grids.Grid.Inject(ej.grids.ForeignKey, ej.grids.Edit);
var grid = new ej.grids.Grid({
    dataSource: data.slice(0,10),
    editSettings: { allowEditing: true },
    columns: [
        { field: 'OrderID', headerText: 'Order ID', textAlign: 'Right', width: 100 },
        {
            field: 'EmployeeID', headerText: 'OrderDate', width: 150, foreignKeyValue: 'BirthDate', dataSource: employeeData, format: 'yMd',
            edit: {
                    create: function() { // to create input element
                        return ej.base.createElement('input');
                    },
                    read: function() { // return edited value to update data source
                        var value = new ej.data.DataManager(employeeData).executeLocal(new ej.data.Query().where(ej.grids.getDatePredicate({field: 'BirthDate', operator: 'equal',value: autoCompleteObj.value})));
                        return value.length && value[0]['EmployeeID']; // to convert foreign key value to local value.
                    },
                    destroy: function() { // to destroy the custom component.
                        autoCompleteObj.destroy();
                    },
                    write: (args) => { // to show the value for date picker
                        autoCompleteObj = new ej.dropdowns.AutoComplete({
                            dataSource: employeeData,
                            fields: { value: args.column.foreignKeyValue },
                            value: args.foreignKeyData[0][args.column.foreignKeyValue]
                        });
                        autoCompleteObj.appendTo(args.element);
                    }
                }
        },
        { field: 'Freight', headerText: 'Freight', width: 100, textAlign: 'Right'},
        { field: 'ShipName', headerText: 'Ship Name', width: 180 }
    ],
    height: 315
});
grid.appendTo('#Grid');
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Grid</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript Grid Control">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-grids/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-dropdowns/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-calendars/styles/material.css" rel="stylesheet">
    
    
    
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet">
    
    
    
    
<script src="https://cdn.syncfusion.com/ej2/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
</head>
<body>
    
    <div id="container">
        <div id="Grid"></div>        
    </div>

<script>
var ele = document.getElementById('container');
if(ele) {
    ele.style.visibility = "visible";
 }   
        </script>
<script src="index.js" type="text/javascript"></script>
</body></html>
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