clean_savepoints(using=None) [source]
Resets the counter used to generate unique savepoint IDs.
The following example demonstrates the use of savepoints:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | from django.db import transaction# open a transaction@transaction.atomicdef viewfunc(request): a.save() # transaction now contains a.save() sid = transaction.savepoint() b.save() # transaction now contains a.save() and b.save() if want_to_keep_b: transaction.savepoint_commit(sid) # open transaction still contains a.save() and b.save() else: transaction.savepoint_rollback(sid) # open transaction now contains only a.save() |
Savepoints may be used to recover from a database error by performing a partial rollback. If you’re doing this inside an atomic() block, the entire block will still be rolled back, because it doesn’t know you’ve handled the situation at a lower level! To prevent this, you can control the rollback behavior with the following functions.
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