Have a formatResults callback function that adds a "custom calculated" field into the entities post returned from a model query in my Cakephp. I would like to sort by this field and use this on a paginate is this possible?
So far i cannot accomplish this because the paginate limits the records fetched and therefore only records less than the paginator limit get sorted and not all the resultset...
Current code:
$owners = $this->Owners->find('all');
$owners->formatResults(function (\Cake\Collection\CollectionInterface $owners) {
$owners = $owners->map(function ($entity) {
$entity->random = rand(0,1);
return $entity;
});
return $owners->sortBy(function ($item){
return $item->random;
},SORT_DESC);
});
This works as expected:
$owners->toArray();
This does not:
$owners = $this->paginate($owners);
$owners->toArray();
Mainly because its "callback processing" only the first 10 records, i would like to process the whole resultset.
After diggin around ive found a similar topic opened by a previous user on the this link, it seems that is not possible to use pagination sort in other than the fields in the database.
As a result, i would suggest:
1 - Either alter your model logic, to accommodate your requirements by creating virtual fields or alter database schema to include this data.
2 - If the data requires further or live processing and it cannot be added or calculated in the database, perhaps programming a component that will replicate the paginate functionality on a cakephp collection would be a good option.The downside of this approach is that all records will be returned from the database which may present performance issues on large resultsets.