Fix export on columns from eloquent relation (#29)

* fix issue with column from relationship not exporting

1. remove condition where $row is being check if not Model
2. use Array dot method insted of flatten.

* Fix stan error on is_numeric method

* Update change log

* Fix pull request no.

* update CHANGELOG

* revert isNull param type

Author: patricktorres27

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## UNRELEASED
 
+## v0.13.1 - 08-04-2022
+
+- Fix export on columns from eloquent relation #29
+
 ## v0.13.0 - 08-04-2022
 
 - Performance improvement #27

src/Jobs/DataTableExportJob.php

@@ -126,12 +126,10 @@ public function handle()
         foreach ($query as $row) {
             $cells = [];
 
-            if (! $row instanceof Model) {
-                $row = $row instanceof Arrayable ? $row->toArray() : (array) $row;
-            }
+            $row = $row instanceof Arrayable ? $row->toArray() : (array) $row;
 
             if ($this->usesLazyMethod() && is_array($row)) {
-                $row = Arr::flatten($row);
+                $row = Arr::dot($row);
             }
 
             $defaultDateFormat = strval(config('datatables-export.default_date_format', 'yyyy-mm-dd'));