/**
* Find a model by its primary key.
*
* @param mixed $id
* @param array $columns
* @return mixed|static|null
*/
public function find($id, $columns = array('*'))
{
if (is_array($id)) {
return $this->findMany($id, $columns);
}
$query = $this->query->where($this->model->getKeyName(), '=', $id);
return $query->first($columns);
}
/**
* Add a "WHERE" clause to the given query.
*
* @param \Nova\Database\Query\Builder $query
* @param string $key
* @param string $extraValue
* @return void
*/
protected function addWhere(QueryBuilder $query, $key, $extraValue)
{
if ($extraValue === 'NULL') {
$query->whereNull($key);
} elseif ($extraValue === 'NOT_NULL') {
$query->whereNotNull($key);
} else {
$query->where($key, $extraValue);
}
}