Sorry, I didn't realize I had done that, I thought I had started a new post. My apologies.
> -----Original Message----- > From: sqlalchemy@googlegroups.com [mailto:[EMAIL PROTECTED] > On Behalf Of [EMAIL PROTECTED] > Sent: Friday, November 28, 2008 11:45 PM > To: sqlalchemy > Subject: [sqlalchemy] Re: New instance ExtraStat with identity key > (...) conflicts with persistent instance ExtraStat > > > What was your justification of changing the name of my thread to a > completely different topic instead of starting a new thread? > > I don't think thats good etiquette. > > > On Nov 29, 5:22 am, "Doug Farrell" <[EMAIL PROTECTED]> wrote: > > Hi all, > > > > I'm having a problem with a new instance of a relation conflicting > with > > an existing instance. I'm using SA 0.5rc with Sqlite3. Here are my > > simplified classes: > > > > class Stat(sqladb.Base): > > __tablename__ = "stats" > > name = Column(String(32), primary_key=True) > > total = Column(Integer) > > created = Column(DateTime, default=datetime.datetime.now()) > > updated = Column(DateTime) > > states = Column(PickleType, default={}) > > extraStats = relation("ExtraStat", backref="stat") > > > > class ExtraStat(sqladb.Base): > > __tablename__ = "extrastats" > > name = Column(String(32), ForeignKey("stats.name"), > > primary_key=True) > > total = Column(Integer) > > created = Column(DateTime, default=datetime.datetime.now()) > > updated = Column(DateTime) > > states = Column(PickleType, default={}) > > > > The above Stat class has a one-to-many relationship with the > ExtraStat > > class (which I think I've implemented correctly). Later in the > program I > > create an in memory data model that has as part of it's components > two > > dictionaries that contain Stat instances. Those Stat instances have > > relationships to ExtraStat instances. My problem comes in the > following > > when I'm trying to update the data in those instances/tables. Here is > a > > section of code that throws the exception: > > > > pressName = "press%s" % pressNum > > # add new ExtraStat instances as relations > > self._addProductStatsPress(productType, pressName) > > self._addPressStatsProduct(pressName, productType) > > try: > > extraStat = session.query(Stat). \ > > filter(Stat.name==productType). \ > > join("extraStats"). \ > > filter(ExtraStat.name==pressName).one() > > except: > > extraStat = ExtraStat(pressName, ExtraStat.PRESS_TYPE) > > self.productStats[productType].extraStats.append(extraStat) > > extraStat.states.setdefault(sstate, 0) > > extraStat.states[sstate] += 1 > > extraStat.updated = now > > extraStat = session.merge(extraStat) > > try: > > extraStat = session.query(Stat). \ > > filter(Stat.name==pressName). \ > > join("extraStats"). \ > > filter(ExtraStat.name==productType).one() <==== > throws > > exception right here > > except: > > extraStat = ExtraStat(productType, ExtraStat.PRODUCT_TYPE) > > self.pressStats[pressName].extraStats.append(extraStat) > > extraStat.states.setdefault(sstate, 0) > > extraStat.states[sstate] += 1 > > extraStat.updated = now > > > > The marked area is wear it throws the exception. I'm not sure what to > do > > here to get past this, any help or ideas would be greatly > appreciated. > > > > The exact exception is as follows: > > Sqlalchemy.orm.exc.FlushError: New instance [EMAIL PROTECTED] With > identity > > key (<class '__main__.ExtraStat'>,(u'C',)) conflicts with persistent > > instance [EMAIL PROTECTED] > > > > Thanks! > > Doug > --~--~---------~--~----~------------~-------~--~----~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
