[4.x] Add support for fast-excel when exporting to excel and csv.

[yajra]

Add fast export function support for https://github.com/rap2hpoutre/fast-excel package.

[yajra]

Usage

1. Install fast-excel using composer require rap2hpoutre/fast-excel.
2. Create a dataTable class php artisan datatables:make Users
3. Adjust UsersDataTable as needed.
4. Set property $fastExcel = true.

class UsersDataTable extends DataTable
{
    protected $fastExcel = true;

    ...
}

5. DataTables will now export csv & excel using fast-excel package.

Faster export by disabling the fast-excel callback

1. Just set property $fastExcelCallback = false. This is enabled by default for a better formatted output of exported file.

class UsersDataTable extends DataTable
{
    protected $fastExcel = true;
    protected $fastExcelCallback = false;

2. Exported file will now be based on how your query was structured. No header formatting and all selected columns in sql will be included in the output.

[yajra]

Using custom callback

Just override the fastExcelCallback method:

class UsersDataTable extends DataTable
{
    protected $fastExcel = true;

    public function fastExcelCallback()
    {
        return function ($row) {
            return [
                'Name' => $row['name'],
                'Email' => $row['email'],
            ];
        };
    }

...