private static function insert_joined_record($class1, $class2)
{
$class2_assoc_name = Inflector::pluralize(Inflector::underscore(NimbleAssociation::class_as_string($class2)));
$obj = NimbleAssociation::get_association_object($class1, $class2_assoc_name, 'has_and_belongs_to_many');
$options = (array) $obj;
$join_table = is_null($options['join_table']) ? NimbleAssociation::generate_join_table_name(array(strtolower(NimbleAssociation::class_as_string($class1)), strtolower(NimbleAssociation::class_as_string($class2)))) : $options['join_table'];
$fk1 = is_null($options['foreign_key']) ? NimbleAssociation::foreign_key($class1) : $options['foreign_key'];
$fk2 = is_null($options['association_foreign_key']) ? NimbleAssociation::foreign_key($class2) : $options['association_foreign_key'];
static::execute("INSERT INTO {$join_table} ({$fk1}, {$fk2}) VALUES ('{$class1->id}', '{$class2->id}');");
}
