Hi! I'm trying save or update a register in database after check if it's exists or not, the save part it's ok, but the update always show the same error:
"FlushError: New instance <Category at 0x10a6aae90> with identity key (<class 'test.model.Category'>, (u'1',)) conflicts with persistent instance <Category at 0x10a6cbd50>" I read about this here <http://docs.sqlalchemy.org/en/latest/orm/session_state_management.html#merge-tips> but I'm a newbie and don't understand what I exactly have to do to correct this, any help is appreciate. Models: class Model(Base): __tablename__ = 'model' id = Column(String(5), primary_key=True) name = Column(String(255), nullable=False) category = relationship("Category", backref="model") class Category(Base): __tablename__ = 'category' id = Column(String(1), primary_key=True) name = Column(String(255), nullable=False) model_id = Column(String(5), ForeignKey('model.id')) Save or update: try: model = session.query(Model).get(item['id']) categories = [] for category in item['category']: ic = Category(id=category['id'], name=category['name']) categories.append(ic) if not model: im = Model(id=item['id'], name=item['name'], category=categories) session.add(im) else: model.category = categories model.name = item['name'] # Error: FlushError: New instance <Category at 0x10a6aae90> with identity key (<class 'test.model.Category'>, (u'1',)) conflicts with persistent instance <Category at 0x10a6cbd50> session.commit() except: session.rollback() raise finally: session.close() -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
