Update CRM-Application from 3.4 to 4.1

[Briones]

Now that crm-application 4.1 rc is released, is there any guide of the things that we need to update? Deprecations, or functions removed, things like that.

I checked the UPGRADE file and it hasn't been updated since February:

https://github.com/oroinc/crm-application/blob/4.1-rc/UPGRADE.md

And the latest release before this was the 4.0 :

https://github.com/oroinc/crm-application/releases/tag/4.0.0

It mentions : "The full list of bug fixes included in this release is available in the wiki." but the link : https://github.com/oroinc/crm-application/wiki/Issues-referenced-in-4.0.0-release doesn't work or it is not publicly available, like I reported months ago here: oroinc/crm#343

I'm going to update a crm-application from 3.4 to 4.1 rc and then update to 4.1 final in January or February, but I don't find any guides to do it. I know is a general update guide for a crm-application app, but I mean a technical one, with the removed methods, and the deprecated ones, also if it's possible a Changelog with the changes since 3.4.

Or just with the general upgrade instructions: https://doc.oroinc.com/backend/setup/upgrade-to-new-version/index everything else will be transparent?

Thanks in advance!

[sadortun]

@Briones Did you look in Platform and CRM Incompatibilities doc ?

• https://github.com/oroinc/platform/blob/master/incompatibilities-4-0-rc.md
• https://github.com/oroinc/crm/blob/master/incompatibilities-4-0-rc.md

[mbessolov]

UPGRADE.md file includes only the most significant requirement changes (e.g. dropped support of some PHP or MySQL version, etc.). It points to the upgrade instructions on OroCRM website, which are current and up-to-date.
CHANGELOG.md (that is referenced from UPGRADE.md) describes how to get a list of all changes in Oro packages (as the actual set of the packages used in each application may very slightly based on the application details):
find -L vendor/oro -maxdepth 2 -type f -name CHANGELOG.md