Stan fixes

Author: yajra

src/CollectionDataTable.php

@@ -104,6 +104,10 @@ public function columnSearch(): void
         for ($i = 0, $c = count($this->request->columns()); $i < $c; $i++) {
             $column = $this->getColumnName($i);
 
+            if (is_null($column)) {
+                continue;
+            }
+
             if (! $this->request->isColumnSearchable($i) || $this->isBlacklisted($column)) {
                 continue;
             }

src/DataTableAbstract.php

@@ -981,6 +981,10 @@ protected function getColumnName(int $index, bool $wantsAlias = false): ?string
     {
         $column = $this->request->columnName($index);
 
+        if (is_null($column)) {
+            return null;
+        }
+
         // DataTables is using make(false)
         if (is_numeric($column)) {
             $column = $this->getColumnNameByIndex($index);

src/QueryDataTable.php

@@ -252,6 +252,10 @@ public function columnSearch(): void
         foreach ($columns as $index => $column) {
             $column = $this->getColumnName($index);
 
+            if (is_null($column)) {
+                continue;
+            }
+
             if (! $this->request->isColumnSearchable($index) || $this->isBlacklisted($column) && ! $this->hasFilterColumn($column)) {
                 continue;
             }
@@ -755,6 +759,7 @@ protected function globalSearch(string $keyword): void
                 ->map(function ($index) {
                     return $this->getColumnName($index);
                 })
+                ->filter()
                 ->reject(function ($column) {
                     return $this->isBlacklisted($column) && ! $this->hasFilterColumn($column);
                 })