/**
* Returns an array of duplicate keys.
*
* @param Collection $data
* @param string $table
* @param string $key
* @return array
*/
protected function intersect(Collection $data, $table, $key)
{
$ids = $data->fetch($key)->toArray();
return $this->table($table)->whereIn($key, $ids)->lists($key);
}
/**
* {@inheritDoc}
*
* @todo Attaching keys to values requires more work to be robust, including determining what is actually required for expects
*/
public function transform(Collection $data, ValidatorInterface $validator = null)
{
$output = new Collection();
// Extract keys
$keys = array_keys($this->expects());
// Check to see if we should validate each record
$shouldValidate = $this->shouldValidate($validator);
foreach ($data as $record) {
// Attach the keys to the values
$record = array_combine($keys, $record);
// For now: throw exception if we are validating but the record doesn't validate
if ($shouldValidate && !$this->validate($record, $validator)) {
throw new TransformerException('A record failed validation');
}
$output->push($this->process($record));
}
return $output;
}