def undoPrincipalTransactions(self, principal, ids):
"""See zope.app.undo.interfaces.IPrincipal"""
if not IPrincipal.providedBy(principal):
raise TypeError("Invalid principal: %s" % principal)
# Make sure we only undo the transactions initiated by our
# principal
left_overs = list(ids)
first = 0
batch_size = 20
txns = self._getUndoInfo(None, principal, first, -batch_size)
while txns and left_overs:
for info in txns:
if (info['id'] in left_overs and
info['principal'].id == principal.id):
left_overs.remove(info['id'])
first += batch_size
txns = self._getUndoInfo(None, principal, first, -batch_size)
if left_overs:
raise UndoError("You are trying to undo a transaction that "
"either does not exist or was not initiated "
"by the principal.")
self._undo(ids)
def getPrincipalTransactions(self, principal, context=None,
first=0, last=-20):
"""See zope.app.undo.interfaces.IPrincipal"""
if not IPrincipal.providedBy(principal):
raise TypeError("Invalid principal: %s" % principal)
return self._getUndoInfo(context, principal, first, last)
