[8.0] Added optional merge of config raw columns to rawColumns method

[Spodnet]

This pull request allows the optional merging of the raw columns defined in the config, and any new ones that you may want to add.

From my point of view, it seems odd that rawColumns was removing the ones defined in config, we use the ones defined on config as default across all tables, e.g. actions, so setting rawColumn(['state']) caused actions to disappear.

The pull request is written for backwards compatiblity, it won't merge unless true is passed.

Example:

In config

    /*
     * Default columns definition of dataTable utility functions.
     */
    'columns' => [
        
        /*
         * List of columns that are allowed to display html content.
         * Note: Adding columns to list will make us available to XSS attacks.
         */
        'raw' => ['action'],

Existing functionality

    return DataTables::eloquent($model)
                ->addColumn('link', '<a href="#">Html Column</a>')
                ->addColumn('action', 'path.to.view')
                ->rawColumns(['state'])
                ->toJson();

Results in raw columns as just state, the action column is no longer a raw column.

New merge functionality

    return DataTables::eloquent($model)
                ->addColumn('link', '<a href="#">Html Column</a>')
                ->addColumn('action', 'path.to.view')
                ->rawColumns(['state'], true)
                ->toJson();

Results in raw columns as state and action.

A variation in this idea could be a new method rawColumnsMerge, so existing method is left alone, and a new that just does merge could be used.

[yajra]

Looks good with some minor typo adjustments. Thanks!

[yajra]

Missing period . and please remove the new line before this comment.

[Spodnet]

No probs, updated.

[yajra]

Released on v8.13.4, thanks! 🚀

[tegos]

it is not clear. seems this method with second param true should stack raw columns if have several calls of this method, but it will stacked only with config raw columns, the previouse call will be ignored.

$datatables = datatables($query);
$raw_columns = ['category', 'article', 'name', 'image'];
$datatables->rawColumns($raw_columns, true);
// another manipulation
$raw_columns = ['warehouse'];
$datatables->rawColumns($raw_columns, true);

which result will be for raw columns ?