fix #107 invalid sql builder

Author: thomas-kl1

Model/Customer/SourceProvider/FilterModifier.php

@@ -9,44 +9,38 @@
 
 use Magento\Framework\Api\Filter;
 use Magento\Framework\Data\Collection;
-use Magento\Framework\Exception\LocalizedException;
 use Opengento\Gdpr\Model\Entity\SourceProvider\ModifierInterface;
 
 final class FilterModifier implements ModifierInterface
 {
-    /**
-     * @inheritdoc
-     * @throws LocalizedException
-     */
     public function apply(Collection $collection, Filter $filter): void
     {
         if ($collection instanceof Collection\AbstractDb && $filter->getField() === 'created_at') {
             $connection = $collection->getConnection();
 
             $visitorSelect = $connection->select()
-                ->from($connection->getTableName('customer_visitor'))
-                ->columns(['customer_id' => 'customer_id', 'last_visit_at' => 'MAX(last_visit_at)'])
+                ->from(
+                    $connection->getTableName('customer_visitor'),
+                    ['customer_id' => 'customer_id', 'last_visit_at' => 'MAX(last_visit_at)']
+                )
                 ->group(['customer_id']);
 
             $collection->getSelect()->joinLeft(
                 ['cv' => $visitorSelect],
-                'main_table.entity_id=cl.customer_id',
+                'e.entity_id=cv.customer_id',
                 null
             );
             $collection->getSelect()->joinLeft(
                 ['cl' => $connection->getTableName('customer_log')],
-                'main_table.entity_id=cl.customer_id',
+                'e.entity_id=cl.customer_id',
                 null
             );
-            $collection->getSelect()->columns(
-                [
-                    'last_visit_at' => 'IFNULL(' .
-                        'cv.last_visit_at,'.
-                        'GREATEST(IFNULL(cl.last_login_at, e.created_at), IFNULL(cl.last_logout_at, e.updated_at))' .
-                    ')',
-                ]
+            $collection->getSelect()->where(
+                $connection->prepareSqlCondition('IFNULL(' .
+                    'cv.last_visit_at,'.
+                    'GREATEST(IFNULL(cl.last_login_at, e.created_at), IFNULL(cl.last_logout_at, e.updated_at))' .
+                    ')', [$filter->getConditionType() => $filter->getValue()])
             );
-            $collection->addFieldToFilter('last_visit_at', [$filter->getConditionType() => $filter->getValue()]);
         }
     }
 }