How do I migrate data to new version of schema when I update my custom addons?

Question

I am writing custom addons for my company. Over their life these
addons will accumulate data in the tables I have modelled, using the
orm.

During development, when I want to update the schema I have to
uninstall and reinstall the addon. It will drop all the tables and
recreate them.

The question is, when I am deploying a new version of an addon to
product (because it has new features which need new table columns,
etc), how do I safely preserve and migrate the production data to the
new schema

Baiju KS · Accepted Answer

Hi, Darrel

If you want to add a new field to an object, you can do that without losting data, only thing you have to take care is don't uninstall the module. If you you uninstall the module all your data in that object will be lost.

To add an extra field to an object you can simply modify your .py file and .xml file in your module and save that then;-

1. Restart your odoo server

2. Upgrage your module (*Settings*==> select *module*==> click *upgrade*

Now you can see the changes you made wit

Med Said BARA · Answer

The* first thing you have to d*o, is to* backup your database* (just is case .. !), and after that, install or uninstall your new module as usual.

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