[orm-devel] Change request for dbclass

[Michael Watkins]

I have a request for a minor change to dbclass.py to make it compatible 
with a Python based web application framework called Quixote ( 
http://www.mems-exchange.org/software/quixote/ check it out, it is very useful)

around line 200, place the following test:
         # MW next line is a patch to deal with Quixote.
         if name == "_p_oid" : return None

Quixote's forms handler has some useful widgets that make for quick and 
easy work with select lists. One aspect of the handler interrogates the 
object to see if it has an attribute _p_oid (this is a ZODB Zope Object DB 
attribute).

Better yet, lets make dbclass a little more generic so that it doesn't fail 
when code that isn't aware of ORM attempts to call an attribute that starts 
with '_' - that is the real source of the issue here - 
dbclass.__getattr__  needs a little clean up.

Look through the original code in the except block and let me know what you 
think.

     def __getattr__(self, name):
         """
         The __getattr__ method is overwriten to call each column's get
         method when an attribute is requested. Attributes that start
         with a _ are ignored.
         """
         # MW next line is a patch to deal with Quixote.
         if name == "_p_oid" : return None #self.__dict__['_oid']
         if name[0] == "_" : return self.__dict__[name]

         try:
             column = self._data[name]
         except KeyError:
             if self.columns.has_key(name):
                 return None
             else:
                 return self.__dict__[name]

         return column.get()