ios - Is it posible to conditionally disable NSValueTransformer for NSManagedObject attribute? -

specifically, have nsmanagedobject "statuscode" attribute set transformable, , reversible value transformer subclass covert nsstrings nsnumbers , vice versa. idea use value transformer receive json , string "status" key in json automatically maps nsnumber represents status code in nsmanagedobject. conversely if upload nsmanagedobject server, @ point status attribute transformed nsnumber string json.

so far good. but, if want able simple int out of nsmanagedobjec's status property, can , enums in code? is, i'd lie cover 3 cases:

1. mymanagedobject.status = [jsonresponse valueforkey:@"status"] (should use transformer nsstring -> nsnumber)
2. [jsonforupload setvalue:mymanagedobject.status forkey:@"status"] (should use transformer nsnumber->nsstring)
3. from elsewhere in code, along lines of: if(mymanagedobject.status & statusinprogress) ... statusinprogress enum.

i'm thinking temporarily disable value transformer, have no idea if nsmanagedobject has reference it, or if should disable nsvaluetransformer class, apparently keeps table of registered transformers?

i know 3rd case [mymanagedobject.status intvalue] , bitwise comparison, i'm wondering if there's way can have intvalue] returned automagically, user of object's point of view.

any ideas?

why don't write 2 additional methods json transform , leave property integer? you'd have best both worlds.