/**
* [$field, $lookupType, $column]
* @param string $lookup
* @return array
* @throws \Exception
*/
protected function explainLookup($lookup)
{
$lookupArr = explode('__', $lookup);
$lookupType = end($lookupArr);
if ($this->lookuper->issetLookup($lookupType)) {
$lookupType = array_pop($lookupArr);
} else {
$lookupType = 'exact';
}
$lookup = implode('__', $lookupArr);
$field = $this->metadata->findField($lookup);
if ($this->metadata->hasFieldObj($field)) {
return [$field, $lookupType, 't.' . $field->db_column];
} else {
if (!isset($this->relatedSelectCols[$lookup])) {
throw new \DomainException("Cant lookup for related field '{$lookup}' without selectRelated()");
}
return [$field, $lookupType, $this->relatedSelectCols[$lookup]];
}
}
