> He addresses the answer in that post.  You don't label the migration
> sequentially.  You label it based on UTC timestamp as the race
> condition where 2 developers generate a migration at exactly the same
> moment is highly unlikely.  Rails 2.1 is going that way (http://
> railscasts.com/episodes/107).

If you are talking about a parallel development environment, a change
made forward in time doesn't necessarily should be ordered after
others that happened before it but based on the same revision.

          C --- D
        /           \
A---B------E-------*--- Should migration E be between C and D ? Can we
say that based on the timestamp?

You'll see, some times order matters.

To me there seem to be 3 possible orders: C-E-D,  C-D-E, E-C-D.

- Dardo Sordi.


> - Keith
> >
>

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