[doc] DB migration mechanism

[Ralf Lang]

On 16.12.2014 22:02, Sebastian Birnbach wrote:
> schemas can be controlled through files in <appname>/migration/*. The
> admin console will notice a new file in this directory and offer the
> right  "update DB schema"-button, which will call the "up" function
> defined in the file.
> 
> Unfortunately, this is about all I could find on the upgrade mechanism.
> Too little for using or understanding it, especially since the file
> naming convention is unclear to me.

Use the horde-db-migrate cli script instead to get a deeper
understanding. The current schema version is stored in a separate table

The naming schema is Number_Classname, where Number is the order in
which they are applied and Classname is derived from Horde_DB_Migration
- see kronolith/migration to get an idea.

-- 
Ralf Lang
Linux Consultant / Developer
Tel.: +49-170-6381563
Mail: lang at b1-systems.de
B1 Systems GmbH
Osterfeldstraße 7 / 85088 Vohburg / http://www.b1-systems.de
GF: Ralph Dehner / Unternehmenssitz: Vohburg / AG: Ingolstadt,HRB 3537

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