Migration 18: Allow user info to be nulled

This allows us to safely delete users without breaking referrer
information.

Signed-off-by: Florian Pritz <bluewind@xinu.at>

2 files changed, 32 insertions, 1 deletions

diff --git a/application/config/migration.php b/application/config/migration.php
index e96af5a41..659907cb8 100644
--- a/application/config/migration.php
+++ b/application/config/migration.php
@@ -21,7 +21,7 @@ $config['migration_enabled'] = true;
 | be upgraded / downgraded to.
 |
 */
-$config['migration_version'] = 17;
+$config['migration_version'] = 18;
 
 
 /*
diff --git a/application/migrations/018_allow_null_values_userinfo.php b/application/migrations/018_allow_null_values_userinfo.php
new file mode 100644
index 000000000..1497dd0d4
--- /dev/null
+++ b/application/migrations/018_allow_null_values_userinfo.php
@@ -0,0 +1,31 @@
+<?php
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+class Migration_allow_null_values_userinfo extends CI_Migration {
+
+	public function up()
+	{
+		$prefix = $this->db->dbprefix;
+
+		if ($this->db->dbdriver == 'postgre') {
+			$this->db->query('
+				ALTER TABLE "'.$prefix.'users"
+					ALTER COLUMN "username" DROP NOT NULL,
+					ALTER COLUMN "password" DROP NOT NULL,
+					ALTER COLUMN "email" DROP NOT NULL;
+				');
+		} else {
+			$this->db->query('
+				ALTER TABLE `'.$prefix.'users`
+					CHANGE `username` `username` varchar(32) NULL,
+					CHANGE `password` `password` varchar(255) NULL,
+					CHANGE `email` `email` varchar(255) NULL;
+				');
+		}
+	}
+
+	public function down()
+	{
+		throw new \exceptions\ApiException("migration/downgrade-not-supported", "downgrade not supported");
+	}
+}