[16.0][ADD] base_partition

[glitchov]

Migrtion from #1893.

This module adds a partition(self, accessor) method to every model.
It accepts for accessor any parameter that would be accepted by mapped,
i.e. a string "field(.subfield)*" or a function (lambda x: not x.b).
It returns a dictionary with keys that are equal to set(record.mapped(accessor)),
and with values that are recordsets.

[rvalyi]

are you sure AGPL is the best fit for such a module? It seems it's a small utility module that could have a broad usage and LGPL might fit better. If such module is AGPL, people not playing the AGPL game could easily just copy the feature instead of adopting the module and help to debug and maintain it... But of course this decision is up to you the authors.

[rousseldenis]

Code review. Seems great. Minor comment

Agree with @rvalyi. Better to move to LGPL

[rousseldenis]

@glitchov

[rousseldenis]

This is a better implementation of https://github.com/odoo/odoo/blob/15.0/odoo/tools/misc.py#L260

[lmignon]

LGTM (Code review)

A very useful addon heavily used in Odoo 10....

[OCA-git-bot]

This PR has the approved label and has been created more than 5 days ago. It should therefore be ready to merge by a maintainer (or a PSC member if the concerned addon has no declared maintainer). 🤖

[dreispt]

/ocabot merge nobump

[OCA-git-bot]

Hey, thanks for contributing! Proceeding to merge this for you.
Prepared branch 16.0-ocabot-merge-pr-2615-by-dreispt-bump-nobump, awaiting test results.

[OCA-git-bot]

It looks like something changed on 16.0 in the meantime.
Let me try again (no action is required from you).
Prepared branch 16.0-ocabot-merge-pr-2615-by-dreispt-bump-nobump, awaiting test results.

[OCA-git-bot]

Congratulations, your PR was merged at 2f8f08f. Thanks a lot for contributing to OCA. ❤️