I just got beta1 and I run into a problem with the following:
sa.Column(u'consumedvalue', sa.Numeric(precision=18, length=2,
asdecimal=True), sa.PassiveDefault("")),
consumedvalue is a readonly column (i.e. computed by Firebird SQL) and I
am getting the following exception when I try to debug (in Boa), the
same happens if I change the above to use ....server_default="".
Do I need to change something else in the model. For each of these type
of columns I also have the following:
class Consumption(object):
def consumedvalue(self):
return self._consumedvalue
consumedvalue = property(consumedvalue)
Werner
Traceback (most recent call last):
File "C:\Python25\Lib\site-packages\boa\Debugger\IsolatedDebugger.py",
line 823, in run
Bdb.run(self, cmd, globals, locals)
File "C:\Python25\lib\bdb.py", line 366, in run
exec cmd in globals, locals
File "<string>", line 1, in <module>
File "C:\Dev\twcb\Program\twcb.py", line 1108, in <module>
main()
File "C:\Dev\twcb\Program\twcb.py", line 1104, in main
appl = BoaApp()
File "C:\Python25\Lib\site-packages\wx-2.8-msw-unicode\wx\_core.py",
line 7912, in __init__
self._BootstrapApp()
File "C:\Python25\Lib\site-packages\wx-2.8-msw-unicode\wx\_core.py",
line 7487, in _BootstrapApp
return _core_.PyApp__BootstrapApp(*args, **kwargs)
File "C:\Dev\twcb\Program\twcb.py", line 266, in OnInit
self.prefs = self.ds.query(db.prefminimal).get(1)
File
"c:\python25\lib\site-packages\sqlalchemy-0.5.0beta1-py2.5.egg\sqlalchemy\orm\session.py",
line 894, in query
return self._query_cls(entities, self, **kwargs)
File
"c:\python25\lib\site-packages\sqlalchemy-0.5.0beta1-py2.5.egg\sqlalchemy\orm\query.py",
line 97, in __init__
self.__setup_aliasizers(self._entities)
File
"c:\python25\lib\site-packages\sqlalchemy-0.5.0beta1-py2.5.egg\sqlalchemy\orm\query.py",
line 111, in __setup_aliasizers
mapper, selectable, is_aliased_class = _entity_info(entity,
ent.entity_name)
File
"c:\python25\lib\site-packages\sqlalchemy-0.5.0beta1-py2.5.egg\sqlalchemy\orm\util.py",
line 401, in _entity_info
mapper = entity.compile()
File
"c:\python25\lib\site-packages\sqlalchemy-0.5.0beta1-py2.5.egg\sqlalchemy\orm\mapper.py",
line 370, in compile
mapper.__initialize_properties()
File
"c:\python25\lib\site-packages\sqlalchemy-0.5.0beta1-py2.5.egg\sqlalchemy\orm\mapper.py",
line 391, in __initialize_properties
prop.init(key, self)
File
"c:\python25\lib\site-packages\sqlalchemy-0.5.0beta1-py2.5.egg\sqlalchemy\orm\interfaces.py",
line 378, in init
self.do_init()
File
"c:\python25\lib\site-packages\sqlalchemy-0.5.0beta1-py2.5.egg\sqlalchemy\orm\properties.py",
line 193, in do_init
strategies.DefaultColumnLoader(self)._register_attribute(None, None,
False, comparator_callable, proxy_property=self.descriptor)
File
"c:\python25\lib\site-packages\sqlalchemy-0.5.0beta1-py2.5.egg\sqlalchemy\orm\strategies.py",
line 37, in _register_attribute
proxy_property=proxy_property
File
"c:\python25\lib\site-packages\sqlalchemy-0.5.0beta1-py2.5.egg\sqlalchemy\orm\unitofwork.py",
line 88, in register_attribute
return attributes.register_attribute(class_, key, *args, **kwargs)
File
"c:\python25\lib\site-packages\sqlalchemy-0.5.0beta1-py2.5.egg\sqlalchemy\orm\attributes.py",
line 1407, in register_attribute
descriptor = proxy_type(key, proxy_property, comparator, parententity)
File
"c:\python25\lib\site-packages\sqlalchemy-0.5.0beta1-py2.5.egg\sqlalchemy\orm\attributes.py",
line 144, in __init__
self.descriptor = self.user_prop = descriptor
AttributeError: can't set attribute
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