Фильтр по наличию. 0 = нет, больше 0 = да. (mFilter2)

{$_modx->runSnippet('!mFilter2', [
                    'element' => 'msProducts',
                    'loadModels' => 'msproductremains',
                    'suggestions' => '1',
                    'filters' => 'remains|remains:boolean',
                    'resources' => '',
                    'groupby' => 'msProduct.id',
                    'leftJoin' => '{ "Remains":{ "class":"msprRemains","on":"msProduct.id = Remains.product_id" } }',
                    'select' => '{ "msProduct":"*","Remains":"SUM(Remains.remains) as remains" }',
                    'sort' => 'remains|remains:desc,ms_product|publishedon:desc,ms_product|createdby:desc,ms|price:asc',
                    'depth' => '',
                    'includeThumbs' => 'small',
                    'tplOuter' => 'tpl-mFilter2.outer',
                    'tplFilter.outer.default' => 'tpl-mFilter2.filter.outer',
                    'limit' => '12',
                    'tpls' => 'tpl-shop-item'
                ])}