Associating the chosen relay point with the cart

To store the customer choice for their relay point, we will first have to create a MySQL table to save the association between the chosen relay point and the customer's cart.

In your module's root directory, create a new directory named install. In this directory, create one file named install.sql; this file will contain the new table creation:

CREATE TABLE IF NOT EXISTS `PREFIX_mymod_carrier_cart` (
  `id_mymod_carrier_cart` int(11) NOT NULL AUTO_INCREMENT,
  `id_cart` int(11) NOT NULL,
  `relay_point` text NOT NULL,
  `date_add` datetime NOT NULL,
  PRIMARY KEY (`id_mymod_carrier_cart`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

Note

In the source code of this chapter, I also created an uninstall.sql file as an example. However, it is better not to delete data on module uninstallation to avoid the loss of data on orders.

Then, in our module's main class, we will add the loadSQLFile method that we used in a previous chapter:

public...