- Add the migration for new column (message_template_id)

console/migrations/m160428_141739_add_tamplates_column_to_posts_table.php

+<?php
+
+use yii\db\Migration;
+
+class m160428_141739_add_tamplates_column_to_posts_table extends Migration
+{
+    public function up()
+    {
+        $this->addColumn(
+            'posts',
+            'template_id',
+            $this->integer(11)->defaultValue(NULL)
+        );
+        $this->addForeignKey(
+            'fk_posts_tamplate_id',
+            'posts', 'template_id',
+            'message_tempalte', 'id'
+        );
+    }
+
+    public function down()
+    {
+        $this->dropForeignKey(
+            'fk_posts_tamplate_id',
+            'posts'
+        );
+        $this->dropColumn(
+            'posts',
+            'template_id'
+        );
+    }
+}