Fixes #224: Add default validator with null value for integers when d…

…b is PostgreSQL

CHANGELOG.md

@@ -4,6 +4,7 @@ Yii Framework 2 gii extension Change Log
 2.0.6 under development
 -----------------------
 
+- Bug #224: Add default validator with null value for integers when db is PostgreSQL (MKiselev)
 - Enh #223: Use ilike operator when generating search model for PostgreSQL (MKiselev)
 - Enh #241: Remove message for unique validator (MKiselev)
 - Enh #238: Use int/bool instead of integer/boolean in phpdoc blocks generated (MKiselev)

generators/model/Generator.php

@@ -337,7 +337,11 @@ public function generateRules($table)
             }
         }
         $rules = [];
+        $driverName = $this->getDbDriverName();
         foreach ($types as $type => $columns) {
+            if ($driverName === 'pgsql' && $type === 'integer') {
+                $rules[] = "[['" . implode("', '", $columns) . "'], 'default', 'value' => null]";
+            }
             $rules[] = "[['" . implode("', '", $columns) . "'], '$type']";
         }
         foreach ($lengths as $length => $columns) {
@@ -888,6 +892,17 @@ protected function getDbConnection()
         return Yii::$app->get($this->db, false);
     }
 
+    /**
+     * @return string driver name of db connection.
+     * @since 2.0.6
+     */
+    protected function getDbDriverName()
+    {
+        /** @var Connection $db */
+        $db = $this->getDbConnection();
+        return $db->driverName;
+    }
+
     /**
      * Checks if any of the specified columns is auto incremental.
      * @param \yii\db\TableSchema $table the table schema