/**
* Cast (specify) index shema in associated table based on Record index property definition.
* Only normal or unique indexes can be casted at this moment.
*
* Example:
* protected $indexes = array(
* [self::UNIQUE, 'email'],
* [self::INDEX, 'status', 'balance'],
* [self::INDEX, 'public_id']
* );
*
* @param array $definition
* @return AbstractIndex
* @throws DefinitionException
* @throws \Spiral\Database\Exceptions\SchemaException
*/
protected function castIndex(array $definition)
{
//Index type (UNIQUE or INDEX)
$type = null;
//Columns index associated too
$columns = [];
foreach ($definition as $chunk) {
if ($chunk == RecordEntity::INDEX || $chunk == RecordEntity::UNIQUE) {
$type = $chunk;
continue;
}
if (!$this->tableSchema->hasColumn($chunk)) {
throw new DefinitionException("Record '{$this}' has index definition with undefined local column.");
}
$columns[] = $chunk;
}
if (empty($type)) {
throw new DefinitionException("Record '{$this}' has index definition with unspecified index type.");
}
if (empty($columns)) {
throw new DefinitionException("Record '{$this}' has index definition without any column associated to.");
}
//Casting schema
return $this->tableSchema->index($columns)->unique($type == RecordEntity::UNIQUE);
}
