ORM, Database, Setup Script
In a custom action controller, render only the contents of a single custom update handle.
Rewrite the breadcrumbs block and add a hardcoded crumb at the beginning without modifying the template. Note: Do not use the _toHtml() method to implement this customization.
$installer = $this; $installer->startSetup(); $installer->run("SQL HIER"); $installer->endSetup();
Create a custom entity table for comments using a setup script.
Create a comments entity model, flat table resource model, and a matching resource collection model.
Create a data upgrade script that uses the comments model classes to populate the database.
Create a frontend form block that allows visitors to add comments to category and product pages.
Use the _beforeSave() method to automatically set the associated page and an updated_at timestamp on the comment records.