[18.0][ADD] partner_event_firstname : improve partner_event with firstname and lastname

partner_event_firstname/README.rst

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+====================================
+Event Registration Partner Firstname
+====================================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! source digest: sha256:0cf4c1187570d429cd0d21a229791fcebfc741cea345d258f8f8ec7802042a13
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |badge1| image:: https://img.shields.io/badge/maturity-Beta-yellow.png
+    :target: https://odoo-community.org/page/development-status
+    :alt: Beta
+.. |badge2| image:: https://img.shields.io/badge/licence-AGPL--3-blue.png
+    :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+    :alt: License: AGPL-3
+.. |badge3| image:: https://img.shields.io/badge/github-OCA%2Fevent-lightgray.png?logo=github
+    :target: https://github.com/OCA/event/tree/18.0/partner_event_firstname
+    :alt: OCA/event
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/event-18-0/event-18-0-partner_event_firstname
+    :alt: Translate me on Weblate
+.. |badge5| image:: https://img.shields.io/badge/runboat-Try%20me-875A7B.png
+    :target: https://runboat.odoo-community.org/builds?repo=OCA/event&target_branch=18.0
+    :alt: Try me on Runboat
+
+|badge1| |badge2| |badge3| |badge4| |badge5|
+
+Bridges ``event_registration_firstname`` and ``partner_event``: when a
+partner is created from a registration, ``firstname`` and ``lastname``
+are passed directly to ``res.partner``.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/event/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us to smash it by providing a detailed and welcomed
+`feedback <https://github.com/OCA/event/issues/new?body=module:%20partner_event_firstname%0Aversion:%2018.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+
+Do not contact contributors directly about support or help with technical issues.
+
+Credits
+=======
+
+Authors
+-------
+
+* INVITU
+
+Contributors
+------------
+
+- Cyril VINH-TUNG <<cyril@invitu.com>>
+
+Maintainers
+-----------
+
+This module is maintained by the OCA.
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+This module is part of the `OCA/event <https://github.com/OCA/event/tree/18.0/partner_event_firstname>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

partner_event_firstname/__init__.py

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+# Copyright 2026 INVITU (<https://www.invitu.com>)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+from . import models

partner_event_firstname/__manifest__.py

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+# Copyright 2026 INVITU (<https://www.invitu.com>)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+{
+    "name": "Event Registration Partner Firstname",
+    "version": "18.0.1.0.0",
+    "category": "Marketing",
+    "author": "INVITU, Odoo Community Association (OCA)",
+    "website": "https://github.com/OCA/event",
+    "license": "AGPL-3",
+    "depends": ["event_registration_firstname", "partner_event"],
+    "installable": True,
+    "auto-install": True,
+}

partner_event_firstname/models/__init__.py

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+# Copyright 2026 INVITU (<https://www.invitu.com>)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+from . import event_registration

partner_event_firstname/models/event_registration.py

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+# Copyright 2026 INVITU (<https://www.invitu.com>)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+from odoo import api, models
+
+
+class EventRegistration(models.Model):
+    _inherit = "event.registration"
+
+    @api.onchange("attendee_partner_id", "partner_id")
+    def _onchange_partner_id(self):
+        res = super()._onchange_partner_id()
+        for registration in self:
+            if registration.attendee_partner_id:
+                registration.firstname = registration.attendee_partner_id.firstname
+                registration.lastname = registration.attendee_partner_id.lastname
+        return res
+
+    @api.model
+    def _prepare_partner(self, vals):
+        res = super()._prepare_partner(vals)
+        firstname = vals.get("firstname") or False
+        lastname = vals.get("lastname") or False
+        res["firstname"] = firstname
+        res["lastname"] = lastname
+        if firstname or lastname:
+            res["name"] = self._get_name(lastname, firstname)
+        return res

partner_event_firstname/pyproject.toml

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+[build-system]
+requires = ["whool"]
+build-backend = "whool.buildapi"

partner_event_firstname/readme/CONTRIBUTORS.md

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+* Cyril VINH-TUNG <\<cyril@invitu.com\>>

partner_event_firstname/readme/DESCRIPTION.md

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+Bridges ``event_registration_firstname`` and ``partner_event``: when a
+partner is created from a registration, ``firstname`` and ``lastname``
+are passed directly to ``res.partner``.