- Добавлена миграция с новым полем subject

console/migrations/m160217_145619_add_subject_column_to_template.php

+<?php
+
+use yii\db\Migration;
+
+class m160217_145619_add_subject_column_to_template extends Migration
+{
+    public function up()
+    {
+        $this->addColumn(
+            'message_template',
+            'subject',
+            $this->string(255)->notNull()
+        );
+    }
+
+    public function down()
+    {
+        $this->dropColumn(
+            'message_template',
+            'subject'
+        );
+    }
+}