(model, migrations) add default migration strategy

src/opnsense/mvc/app/models/OPNsense/Base/BaseModelMigration.php

@@ -37,7 +37,27 @@ use Phalcon\Logger\Adapter\Syslog;
  */
 abstract class BaseModelMigration
 {
+    /**
+     * Walk through all nodes and check required defaults
+     * @param $node
+     */
+    private function checkDefaults($node) 
+    {
+        foreach ($node->__items as $key => $subnode) {
+            if (count($subnode->__items) > 0) {
+                $this->checkDefaults($subnode);
+            } elseif ($subnode->isEmptyAndRequired()) {
+                $subnode->applyDefault();
+            }
+        }
+    }
+
+    /**
+     * default model migration
+     * @param $model
+     */
     public function run($model)
     {
+        $this->checkDefaults($model);
     }
 }

src/opnsense/mvc/app/models/OPNsense/Base/FieldTypes/BaseField.php

@@ -338,7 +338,7 @@ abstract class BaseField
      * check if this field is unused and required
      * @return bool
      */
-    protected function isEmptyAndRequired()
+    public function isEmptyAndRequired()
     {
         if ($this->internalIsRequired && ($this->internalValue == "" || $this->internalValue == null)) {
             return true;