Fixing some bugs and adding new features

[dlnsk]

If I use calculated field in query I have an error because $this->originalBuilder->count(); produce "select count(*) as aggregate", so it haven't calculated fields.
I haven't opportunity to test it with "distinctCountGroup" option.

[dlnsk]

I am new on github as pull requester, so sorry...
Next commit (01b3afb) allow to use sorting on multiple columns described here: https://datatables.net/reference/option/columns.orderData

[dlnsk]

Next commit (5bd0254) add a new option 'emptyAtEnd' and method setEmptyAtEnd() which allow to sort table such that empty fields will always at end of table.

[dlnsk]

Two new bugs fixed:
c41cff7 is critical bug because some time options don't separate by commas, so it rise a javascript error and table don't display.
10b9c5b - if option was an array we got array with object inside. That's very strange. So some options didn't work (for example, https://datatables.net/reference/option/columns)

[dlnsk]

Forget to say: I using Datatable 1.10.4

[timgws]

@dlnsk this branch (master) is not for support Datatables version 1.10. You should swap to version3 if you want to support Datatables 1.10.

[dlnsk]

@timgws I use it and it works well. version3 have same critical bugs which I fix. So, maybe 1.10 unsupported just because have some bugs? ;o)

[timgws]

Does your branch still work with datatables 1.9?

[dlnsk]

@timgws I have install datatables 1.9.4 and test my branch with it. It works fine!
This is my initialization for datatable 1.9.4:

$table = Datatable::table()
                ->showFooter()
                ->setId('stock-table')
                ->setClass('table table-bordered dataTable compact')
                ->addColumn('Артикул', 'Торговая марка', 'Описание', 'Аур', 'Мег', 'Мск', 'Бел', 'Цена')
                ->setUrl(route('api.stock'))
                ->setCallbacks('fnServerParams', 'passAdditionalParams')
                ->setOptions(array(
                                'sDom' => 'rtpli',
                                'oLanguage' => [
                                    "sEmptyTable" => "Ничего не найдено",
                                    'oPaginate' => [
                                        'sFirst' => '<<',
                                        'sLast' => '>>',
                                        'sPrevious' => '<',
                                        'sNext' => '>',
                                    ]
                                ],
                                'aoColumns' => [
                                    ['sWidth' => '15%', 'sClass' => 'details-control'],
                                    ['sWidth' => '25%'],
                                    null,
                                    ['sWidth' => '1%'],
                                    ['sWidth' => '1%'],
                                    ['sWidth' => '1%'],
                                    ['sWidth' => '1%'],
                                    ['sWidth' => '7%', 'aDataSort' => [7, 0]]
                                ],
                                "fnFooterCallback" => "function() {
                                    $('.footer3').html('qwerty');
                                }"
                            )
                )
                ->noScript();

[dlnsk]

This is my initialization for datatable 1.10.4 (it only difference by option's names which was changed in 1.10):

$table = Datatable::table()
                ->showFooter()
                ->setId('stock-table')
                ->setClass('table table-bordered dataTable compact')
                ->addColumn('Артикул', 'Торговая марка', 'Описание', 'Аур', 'Мег', 'Мск', 'Бел', 'Цена')
                ->setUrl(route('api.stock'))
                ->setCallbacks('fnServerParams', 'passAdditionalParams')
                ->setOptions(array(
                                'dom' => 'rtpli',
                                'language' => [
                                    "lengthMenu" => "Показывать _MENU_ записей",
                                    "info" => "Отображаются записи с _START_ по _END_ из _TOTAL_",
                                    "emptyTable" => "Ничего не найдено",
                                    "infoEmpty" => "",
                                    'paginate' => [
                                        'first' => '<<',
                                        'last' => '>>',
                                        'previous' => '<',
                                        'next' => '>',
                                    ]
                                ],
                                'columns' => [
                                    ['width' => '12%', 'className' => 'details-control'],
                                    ['width' => '25%'],
                                    null,
                                    ['width' => '1%'],
                                    ['width' => '1%'],
                                    ['width' => '1%'],
                                    ['width' => '1%'],
                                    ['width' => '7%', 'orderData' => [7, 0]]
                                ],
                                "footerCallback" => "function( tfoot, data, start, end, display ) {
                                    var api = this.api();
                                    $( api.column( 5 ).footer() ).html('123');
                                }"
                            )
                )
                ->setCallbacks('columnDefs', '[{"targets": 7, "render": renderPrice}]')
                ->noScript();

[dlnsk]

Next feature allow to return additional data from server using ajax.

[timgws]

Merging this has broken the unittests for QueryEngineTest.