Why object returns me everything ?
When I print out $a via print_r i got everyting on site include databases, translations etc. And when I include it on array it's so big and it will be cuz of slowness ?
How can I return only data ? and is there a hydrate array on modelsManager ?
When a resulset is print_r'd, it recursively prints references to objects that aren't part of the resulset such as the models manager, the DI etc. So seeing a big output does not mean the resulset actually have a big size or that it could make your application slow.
I believe models have a dump() method that gives you just the relevant data for a model.