require_once 'DataObject.php'; class Student extends DataObject { protected $table = 'students'; protected $many_many = array( 'courses' => array( 'join_table' => 'registrations', 'join_key' => 'student_id', 'join_fields' => array('course_id', 'grade') ) ); }
require_once 'DataObject.php'; class Product extends DataObject { protected $table = 'products'; protected $many_many = array( 'categories' => array( 'join_table' => 'product_categories', 'join_key' => 'product_id', 'join_fields' => 'category_id' ) ); }This code creates a class for the "products" table, and defines a many-to-many relationship to the "categories" table. The "join_table" property specifies the name of the third table, "product_categories", while "join_key" specifies the name of the foreign key column in the "product_categories" table that links to the "products" table. "join_fields" specifies the name of the foreign key column in the "product_categories" table that links to the "categories" table. Package library: DataObject