you can check for a given identity in the session using the identity key functions:
from sqlalchemy.orm.util import identity_key key= identity_key(MyClass, someid) object_already_in_session = key in session.identity_map but usually people use session.merge(object) instead of session.add() to handle all of this automatically. On Sep 19, 2011, at 4:55 AM, Eduardo wrote: > Hi, > I create a certain number of objects in a loop, I check if each of the > objects is already stored in the session and if it is not I add it to > the session. > > session = Session() > for item in items: > item1=create_item() > if not item1 in session: > session.add(item1) > session.commit() > > The problem is that when I add two objects to the session that are not > the same but have some id I get the error: > get an error sqlalchemy.exc.IntegrityError: (IntegrityError) duplicate > key value violates unique constraint > Is there any function that directly checks if there two objects with > the same id in a session? > Thanks > > -- > 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 > sqlalchemy+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/sqlalchemy?hl=en. > -- 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 sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
