[Erp5-dev] guard agains concurrent edits

[bartek]

Hi,

Would it be feasible to implement a kind of a "guard" against concurrent
edits of the same object? I mean this: if I open a form to edit, and
while I'm typing another guy opens the same form, edits and saves, then
when I save the form the other guy's changes will be silently
overwritten, and nobody would be notified. In a multi-user environment
this can cause serious issues.

I see two ways to solve it: first is MoinMoin-like, the other would be
to store original data and load time in a form and upon submission
checking if modification date has been changed, and if so then it would
be possible to check if there are conflicts.

What do you think?

Bartek

-- 
"feelings affect productivity. (...) unhappy people write worse
software, and less of it."
Karl Fogel, "Producing Open Source Software"