[16.0][FIX] mail_composer_cc_bcc: fix duplicate key value error "unique_mail_message_id_res_partner_id_if_set"

[trisdoan]

Note

• Took over this PR: https://github.com/OCA/social/pull/1428
• depends on: https://github.com/OCA/social/pull/1519#pullrequestreview-2504965314
• Took this chance to
  • Fix https://github.com/OCA/social/issues/1263
    • it was fixed in https://github.com/OCA/social/pull/1309
    • But there is a case, described in https://github.com/OCA/social/pull/1310#issuecomment-2186838432 , which was not covered.
  • Backport from 17.0: using res.partner instead product.template in test. Otherwise, tests cannot run because model product.template is not in environment.

Result

mail_composer_cc_bcc_16.webm

[OCA-git-bot]

Hi @hailangvn2023, some modules you are maintaining are being modified, check this out!

[trisdoan]

~~DRAFT: fix test~~

[github-actions[bot]]

There hasn't been any activity on this pull request in the past 4 months, so it has been marked as stale and it will be closed automatically if no further activity occurs in the next 30 days. If you want this PR to never become stale, please ask a PSC member to apply the "no stale" label.

[github-actions[bot]]

There hasn't been any activity on this pull request in the past 4 months, so it has been marked as stale and it will be closed automatically if no further activity occurs in the next 30 days. If you want this PR to never become stale, please ask a PSC member to apply the "no stale" label.