Hi,
I need to get a single event at an extension in case of such operation:
obj.colAttr = [x, y, z]
right now I will receive:
extension.remove(...) for each value currently in colAttr
extension.append(...) for x, y and z.
what I need is something like:
extension.replace(oldvalues, values) with two lists or something like
that.
Right now my approach (yes, I know this is sick) is:
def weComeFrom():
f=inspect.currentframe().f_back.f_back
while(inspect.getmodule(f).__name__.startswith('sqlalchemy.')):
f=f.f_back
return (f.f_lasti, f.f_code)
class ImmutableExtension(TefAttributeExtension):
active_history = True
triggerName = 'immutable'
def append(self, state, value, initiator):
f = weComeFrom()
try:
lf = initiator.__tefLastComeFrom
except AttributeError:
lf = None
if len(self._getOldValue(state, initiator)) == 0:
initiator.__tefLastComeFrom = f
return value
elif f == lf:
return value
else:
self.raiseError(state, value, None, initiator)
What is the proper way to achieve this?
regards,
Filip Zyzniewski
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