Set null to post_parent_id when it is 0 on c_forum_post table - refs #11477

app/Migrations/Schema/V110/Version20160808110200.php

@@ -0,0 +1,29 @@
+<?php
+/* For licensing terms, see /license.txt */
+
+namespace Application\Migrations\Schema\V110;
+
+use Application\Migrations\AbstractMigrationChamilo;
+use Doctrine\DBAL\Schema\Schema;
+
+/**
+ * Set null to post_parent_id when it is 0 on c_forum_post table
+ */
+class Version20160808110200 extends AbstractMigrationChamilo
+{
+    /**
+     * @param Schema $schema
+     */
+    public function up(Schema $schema)
+    {
+        $this->addSql("UPDATE c_forum_post SET post_parent_id = NULL WHERE post_parent_id = 0");
+    }
+
+    /**
+     * @param Schema $schema
+     */
+    public function down(Schema $schema)
+    {
+        $this->addSql('UPDATE c_forum_post SET post_parent_id = 0 WHERE post_parent_id = NULL');
+    }
+}