[sqlalchemy] Re: Mapped Orm Object Notifier
class OrmRecord(object): def _get_column_value(self, name): # return self.__dict__[name] return getattr(self, name) def _set_column_value(self, name, value): val = setattr(self, name, value) self._notify_change_functions() # Return result just because return val def add_change_function(self, instance, function): Add Change Function Add a function to this record that will be modified when this record is changed This function will be called and passed the record it wants to be notified about instance The instance of the object to be called back function The function to be called and passed the instance try: self._change_functions except AttributeError: self._change_functions = weakref.WeakKeyDictionary () self._change_functions[instance] = function def _notify_change_functions(self): try: self._change_functions except AttributeError: return for instance in self._change_functions: self._change_functions[instance](self) self._OrmRecord = OrmRecord print 'Mapped ' + self.schema_table_name + '\n\t' + str (self._OrmRecord) + '\n\t' + str(metadata.tables [self.schema_table_name]) self._mapper = mapper(self._OrmRecord, self._metadata_table) This is the code i put together I set the value of the orm_record using the setter and getter functions above. Anyone know of a more sqlalchemy way of doing it? --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
[sqlalchemy] Re: Mapped Orm Object Notifier
you can add event handlers to attributes using @validates: http://www.sqlalchemy.org/docs/05/mappers.html?highlight=validates#simple-validators or the more longhand AttributeExtension: http://www.sqlalchemy.org/docs/05/reference/orm/interfaces.html?highlight=attributeextension#sqlalchemy.orm.interfaces.AttributeExtension jarrod.ches...@gmail.com wrote: class OrmRecord(object): def _get_column_value(self, name): # return self.__dict__[name] return getattr(self, name) def _set_column_value(self, name, value): val = setattr(self, name, value) self._notify_change_functions() # Return result just because return val def add_change_function(self, instance, function): Add Change Function Add a function to this record that will be modified when this record is changed This function will be called and passed the record it wants to be notified about instance The instance of the object to be called back function The function to be called and passed the instance try: self._change_functions except AttributeError: self._change_functions = weakref.WeakKeyDictionary () self._change_functions[instance] = function def _notify_change_functions(self): try: self._change_functions except AttributeError: return for instance in self._change_functions: self._change_functions[instance](self) self._OrmRecord = OrmRecord print 'Mapped ' + self.schema_table_name + '\n\t' + str (self._OrmRecord) + '\n\t' + str(metadata.tables [self.schema_table_name]) self._mapper = mapper(self._OrmRecord, self._metadata_table) This is the code i put together I set the value of the orm_record using the setter and getter functions above. Anyone know of a more sqlalchemy way of doing it? --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
