/**
* @param int $index The position of the column in the index (0 indexed)
* @param Column $column
*
* @return Index
* @throws Exception\Manager
*/
public function addColumn($index, Column $column)
{
if ($this->columns->offsetExists($index) === true) {
throw Exception\Index::columnAlreadyExists($index, $this->getName());
}
$this->columns->offsetSet($index, $column);
return $this;
}
/**
* Add a foreign column for the relation
*
* @param Column $column
*
* @return $this
* @throws Exception\Manager
*/
public function addForeignForeignColumn(Column $column)
{
$alias = $this->normalizeName($column->getName());
if ($this->foreignForeignColumns->offsetExists($alias) === true) {
throw Exception\Relation::foreignForeignColumnAlreadyExists($alias, $this->getName());
}
$this->foreignForeignColumns->offsetSet($alias, $column);
return $this;
}
