def __delitem__(self, name):
field = self.schema[name]
field.interface = None
del self.schema._InterfaceClass__attrs[name]
sch = getUtility(ISchemaType, self.__context__.oid)
for column in storage.mapFieldToColumns(field):
getattr(sch.Type.__table__.c, column.name).drop()
self.updateSchema()
def __setitem__(self, name, field):
field.__name__ = name
if self.schema._InterfaceClass__attrs.has_key(name):
raise KeyError('Field already exists %s'%name)
self.schema._InterfaceClass__attrs[name] = field
sch = getUtility(ISchemaType, self.__context__.oid)
for column in storage.mapFieldToColumns(field):
column.create(sch.Type.__table__, populate_default=True)
self.updateSchema()
