Hi,
I'm stuck with the code below raise FlushError complaining:
Traceback (most recent call last):
File "<stdin>", line 49, in <module>
File "/misc/src/sqlalchemy/sqlalchemy/lib/sqlalchemy/orm/session.py", line
673, in commit
self.transaction.commit()
File "/misc/src/sqlalchemy/sqlalchemy/lib/sqlalchemy/orm/session.py", line
378, in commit
self._prepare_impl()
File "/misc/src/sqlalchemy/sqlalchemy/lib/sqlalchemy/orm/session.py", line
362, in _prepare_impl
self.session.flush()
File "/misc/src/sqlalchemy/sqlalchemy/lib/sqlalchemy/orm/session.py", line
1356, in flush
self._flush(objects)
File "/misc/src/sqlalchemy/sqlalchemy/lib/sqlalchemy/orm/session.py", line
1416, in _flush
mapperutil.state_str(state), path))
sqlalchemy.orm.exc.FlushError: Instance <Delivery at 0x85cb82c> is an
unsaved, pending instance and is an orphan (is not attached to any parent
'Project' instance via that classes' 'deliveries' attribute)
I don't understand what I should do to fix it.
What I can't understand is why it is considered an orphan: I *do* set job_id
on it and it should be enought to build the relation (I *do* need
delete-orphan).
Is the only solution to attach an instance (u.job = myjob) or is there
another solution that doesn't require me to build the instance?
Thanks in advance
sandro
*:-)
--
Sandro Dentella *:-)
http://sqlkit.argolinux.org SQLkit home page - PyGTK/python/sqlalchemy
------------------------------------------------------------------------
import datetime
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Table, Column, ForeignKey, text, func
from sqlalchemy.types import *
from sqlalchemy import orm
Base = declarative_base()
Base.metadata.bind = 'sqlite://'
#Base.metadata.bind = 'postgres://localhost/fossati'
Session = orm.sessionmaker(bind=Base.metadata.bind)
sess = Session()
class Project(Base):
__tablename__ = "project"
id = Column(Integer, primary_key=True)
name = Column(String(30), nullable=False)
def __str__(self):
return self.name
class Delivery(Base):
__tablename__ = 'delivery'
id = Column(Integer, primary_key=True)
data = Column(Date, nullable=True)
job_id = Column(ForeignKey(Project.id), nullable=False)
note = Column(Text)
job = orm.relation(Project, backref=orm.backref('deliveries',
cascade="all, delete-orphan"))
# job = orm.relation(Project, backref='deliveries', lazy=False)
def __repr__(self):
return self.note
__str__ = __repr__
Base.metadata.create_all()
Base.metadata.bind.echo=True
p = Project(name='test 1')
sess.add(p)
sess.commit()
print "DELIVERY"
u = Delivery()
u.job_id = p.id
# u.job = p ## this way it works
u.data = datetime.date(2009, 12, 3)
sess.add(u)
sess.commit()
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