Make entity values _raw for before passing to DB.

[nowackipawel]

related to issue 1646

[lonnieezell]

Yeah, not a fan of adding yet another argument to that method. As mentioned in #1646 I think a better solution would be a new method, toRawArray().

[nowackipawel]

There was already argument called $cast. I've renamed it cuz it doesn't mean just cast anymore.

Pls lemme know what your final decision is. Should I write method what you mentioned above ?

Btw: what about mine concerns about validation rules in this particular case? Should we pass $data converted by getMyVariable methods to validation and raw data to database (in insert/update)? Won't it look weird ?
In my opinion to make it fully work we need one type of behavior for raw - database, second with using getMyVariable - validation, and third with getMyVariable and casting for normal work with entities. :/

[lonnieezell]

Validation should get the raw value, also. The getX methods are intended to provide ways to change how the data is represented outside of the class, like when used in views, etc, NOT to actually change the data itself. Validation should be done on the data itself.

I'll implement a toRawArray() method.