public function up()
 {
     $this->createTable(Category::tableName(), ['id' => Schema::TYPE_PK, 'owner_id' => $this->integer(), 'status' => Schema::TYPE_SMALLINT, 'title' => Schema::TYPE_STRING, 'name' => Schema::TYPE_STRING, 'image' => Schema::TYPE_STRING, 'content' => Schema::TYPE_TEXT, 'lft' => Schema::TYPE_INTEGER, 'rgt' => Schema::TYPE_INTEGER, 'depth' => Schema::TYPE_INTEGER]);
     $this->createTable(CategoryToItem::tableName(), ['category_id' => Schema::TYPE_INTEGER, 'item_id' => Schema::TYPE_INTEGER]);
     MigrationHelper::addForeignKey(CategoryToItem::tableName(), 'category_id', Category::tableName(), 'id', 'CASCADE', 'CASCADE');
     MigrationHelper::addForeignKey(CategoryToItem::tableName(), 'item_id', Item::tableName(), 'id', 'CASCADE', 'CASCADE');
 }
 public function down()
 {
     $this->dropTable(Item::tableName());
 }