[Rails] Re: Concurrecy question with ActiveRecord

[Gleb Arshinov]

>>>>> "Michael" == Michael Koziarski <koziarski at gmail.com> writes:

    >> Version number (incrementing integer) or version timestamp work
    >> well and are conceptually very simple (win-win).  I've seen it
    >> done as a version number, but otherwise exactly as you
    >> describe.

    Michael> Version numbers are useful, and are usually very fast too
    Michael> (easy indexing).  However, there's useful information in
    Michael> the 'last_modified' column, you can see *when* things
    Michael> happened

I wasn't suggesting not having last_modified, it is useful in itself.
I was thinking of additional version number column (which is also
interesting information, beyond its use for conflict resolution).

Gleb