Notes on migrating Odoo from 11 to 12

These are mostly notes to myself, as it’s a somewhat involved process, and the documentation is not very useful. I had to puzzle-piece it together from dozens of form posts and questions, so I hope that this overview will be helpful to others.

Overall process

Odoo does not have an automatic database update when changing between major versions (however, it seems when updating within the same version, the database is adapted and won’t work with older versions).

To update major versions, two parts have to be updated:

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