Michael Bayer wrote:
>
>> What if they exist but don't match the spec that SA has created?
>
> just try it out...create_all() by default checks the system tables for
> the presence of a table first before attempting to create it
Cool,
> (same
> with dropping).
When would SA drop a table?
> this is controlled by a flag called "checkfirst".
This a parameter to the methods or does it need to be set in some config
file?
> if you're concerned about people running your application against
> databases created from a different version and then failing, I would
> suggest adding a "version" table to your database which contains data
> corresponding against the version of your application in some way.
Good plan.
> There has been interest among some SA users over building a generic
> "schema comparison" system and I think even some prototypes are
> available, though I think thats a fairly complicated and unreliable
> approach to take for this particular issue.
Do the projects have a name?
cheers,
Chris
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