[development] versioned schema?
hall.blake at gmail.com
Mon Jun 11 18:32:59 UTC 2007
Maybe we can borrow from the rails world and base this versioning on
rake's db migrations?
On Jun 11, 2007, at 1:24 PM, Philippe Jadin wrote:
>> I kinda like #2 the best, but #1 may make more sense with our current
>> hook_update_N() system. (#3 has the "advantage" that we might be
>> to automatically update from one version to the next, but it could
>> also be very complicated.) Perhaps hook_schema_N() and
>> hook_update_N() should be tied together in some way so that the new
>> schema and the upgrade path to get to it from the previous one are
>> always specified together.
> Have you considered querying the database to check what fields are
> already there and add the missing ones based on the latest schema?
> The problem is what to do when a field changes type / name between two
> versions of the schema. But does it happen often?
> This would make it very easy for module developpers : simply add the
> field in the schema, and the schema api take cares of adding the
> required fields. More complex operations could be handled with #1. We
> did this with our cms, and it worked great. (this way you have schema
> versioned like code in cvs). I would not touch the fields found in the
> DB and not found in the schema, just in case :-)
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