SQL Alchemy related Objects Error
- by alex
from sqlalchemy.orm import relation, backref
from sqlalchemy import Table, Column, Integer, String, MetaData, ForeignKey, Date, Sequence
from sqlalchemy.ext.declarative import declarative_base
Base = declarative_base()
class GUI_SCENARIO(Base):
__tablename__ = 'GUI_SCENARIO'
Scenario_ID = Column(Integer, primary_key=True)
Definition_Date = Column(Date)
guiScenarioDefinition = relation('GUI_SCENARIO_DEFINITION',
order_by='GUI_SCENARIO_DEFINITION.Scenario_Definition_ID',
backref='guiScenario')
def __init__(self, Scenario_ID=None, Definition_Date=None):
self.Scenario_ID = Scenario_ID
self.Definition_Date = Definition_Date
class GUI_SCENARIO_DEFINITION(Base):
__tablename__='GUI_SCENARIO_DEFINITION'
Scenario_Definition_ID = Column(Integer, Sequence('Scenario_Definition_ID_SEQ'), primary_key=True)
Scenario_FK = Column(Integer, ForeignKey('GUI_SCENARIO.Scenario_ID'))
Definition_Date=Column(Date)
guiScenario = relation(GUI_SCENARIO, backref=backref('guiScenarioDefinition', order_by=Scenario_Definition_ID))
def __init__(self, Scenario_FK, Definition_Date):
self.Scenario_FK = Scenario_FK
self.Definition_Date = Definition_Date
guiScenario = relation(GUI_SCENARIO,
backref=backref('guiScenarioDefinition',
order_by=Scenario_Definition_ID))
tableNameScenario = "GUI_SCENARIO"
scenarioClass = getattr(MappingTablesScenario, tableNameScenario)
tableScenario = Table(tableNameScenario, meta, autoload=True)
mapper(scenarioClass, tableScenario)
scenarioName = scenarioDefinition.name
scenarioDefinitionDate = datetime.today()
newScenario = MappingTablesScenario.GUI_SCENARIO(scenarioName,
scenarioDefinitionDate)
print newScenario.guiScenarioDefinition
If I try to get the objects related to a scenarioObject, I always get this error:
AttributeError: 'GUI_SCENARIO' object has no attribute 'guiScenarioDefinition'
Does anyone know, why I get this error?
