I am really sorry but I pressed POST before I was ready. So again the
code (without comments)
session = Session()
order = session.query(dbOutOrder).get(2)
for line in order.lines:
session.delete(line)
session.flush()
for i in range(1,10):
line = dbOutLine()
line.HEADER_id = order.id
line.ITEM_SKU_id = 1
line.QTY = 1
order.lines.append(line)
session.add(order)
session.flush()
i = 0
for line in order.lines:
if i % 2 == 0:
print "DELETE"
session.delete(line)
i += 1
session.commit()
and the mappers:
mOutOrder = mapper(dbOutOrder, tbl_outHeader, properties={'lines':
relation(dbOutLine)})
mOutLine = mapper(dbOutLine, tbl_outLine)
as soon as I get to commit I get error:
Unexpected error: <class
'sqlalchemy.orm.exc.ConcurrentModificationError'> Deleted rowcount 5
does not match number of objects deleted 7
What I am doing wrong? Of course if I issue commit after first delete
everything is fine.
Any hints?
-- jacek
PS: Sorry again for the previous POST.
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