1: <?php
 2: 
 3: namespace Alchemy\core\schema;
 4: 
 5: 
 6: /**
 7:  * Represent a column in SQL with a foreign key constraint to another column
 8:  */
 9: class Foreign extends Column {
10:     public function copy(array $args = array(), $table = null, $name = '?') {
11:         $source = is_string($this->args[0])
12:             ? Column::find($this->args[0], $table)
13:             : $this->args[0];
14: 
15:         // only override keyword args
16:         $args['foreign_key'] = $source;
17:         $args['auto_increment'] = false;
18:         $args += array_slice($this->args, 1, NULL);
19: 
20:         return $source->copy($args, $table, $name);
21:     }
22: }