On 01/02/2013 02:16 AM, Phillip Frost wrote:
[1] http://doc.openerp.com/v6.1/developer/11_upgrade_and_migration.html
"The creation (or modification in the case of an upgrade) of SQL tables is automated
thanks to the description of objects in the server."
"The upgrade from version to version is automatic and doesn’t need any special
scripting on the user’s part."
Hi Philip,
These statements, from the developer documentation, are true in the
following sense: if a newer version of a module contains a change in the
database layout, neither the developer of the module nor the user who
installs it need to bother with SQL statements. The OpenERP module
loading process takes care to adapt the database layout according to the
model and fields description in the module.
However, if any existing *data* needs to be adapted, the developer needs
to write a migration script to do so. The OpenERP server contains a
mechanism to run such migration scripts included in the module.
Now, an upgrade from one major version of OpenERP to another comes with
a number of changes that require existing data to be manipulated. It is
this manipulation of existing data in the case of a major upgrade that
is the paid migration offer of OpenERP SA. This is stated in various
places on the OpenERP website and in the documentation. If the
statements above aimed at module developers seem to imply a free
migration between major versions I am sure it is not intentional.
Most likely, OpenERP SA maintain a set of closed source migration
scripts for the official addons to perform the upgrades internally. The
aforementioned OpenUpgrade project aims at developing open source
counterparts of these scripts.
Best regards,
Stefan.
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