Awesome! That is exactly what I needed - thanks very much!
On Jun 30, 8:06 am, Michael Bayer <mike...@zzzcomputing.com> wrote: > your question has arrived at the same time almost the exact same question is > coming from another user Russ, so I've added an example of how to use > attribute events in conjunction with a TypeDecorator, so that the data is > coerced both at the database level, as well as at the attribute setter level > - this is > athttp://www.sqlalchemy.org/trac/wiki/UsageRecipes/ValidateAllOccurrenc.... > > On Jun 29, 2011, at 9:40 PM, Jason Denning wrote: > > > Hi All, > > I am building a Pyramid app using SQLAlchemy for the model, and I > > would like to be able to use the attributes as full-fledged objects > > (i.e., I would like to be able to define methods attached to the > > attributes), ideal example usage (although this is a somewhat > > contrived example): > > > class Phone(Base): > > id = Column(Integer, primary_key=True) > > phone = Column(MyPhoneType) > > >>>> p1 = Phone(phone="9995551212") > >>>> session.add(p1) > >>>> p1.phone > > '9995551212' > >>>> p1.phone.prettyPrint() > > "(999) 555-1212" > >>>> p1.phone.foo() > > "Now doing foo..." > > > I have made some attempts towards this end using TypeDecorator and by > > trying to extend UserDefinedType, but it seems that the instantiated > > objects always have their mapped attributes converted into regular > > python types (string, unicode, etc..) losing whatever methods/class > > level stuff I try to define. > > > I am not trying to affect any aspect of the descriptor protocol, > > object management, database interaction or any other ORM type stuff - > > I just want some helper methods, and maybe some instance-level > > attributes to be available for certain types of mapped attributes. > > > Is this possible? Should I be doing this using TypeDecorator / > > UserDefinedType / other ? Is anyone else attempting this type of > > thing, or am I totally crazy? > > > Thanks, > > Jason > > > -- > > You received this message because you are subscribed to the Google Groups > > "sqlalchemy" group. > > To post to this group, send email to sqlalchemy@googlegroups.com. > > To unsubscribe from this group, send email to > > sqlalchemy+unsubscr...@googlegroups.com. > > For more options, visit this group > > athttp://groups.google.com/group/sqlalchemy?hl=en. -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
