[ADD] website_mass_mailing_no_duplicate

website_mass_mailing_no_duplicate/README.rst

@@ -0,0 +1,103 @@
+======================================
+Website - Mass Mailing - No duplicates
+======================================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! source digest: sha256:158e89f61f2770f93ad3c67969c8e4726a8e73cc45e4225c218e405d0ca602a4
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |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%2Fwebsite-lightgray.png?logo=github
+    :target: https://github.com/OCA/website/tree/18.0/website_mass_mailing_no_duplicate
+    :alt: OCA/website
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/website-18-0/website-18-0-website_mass_mailing_no_duplicate
+    :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/website&target_branch=18.0
+    :alt: Try me on Runboat
+
+|badge1| |badge2| |badge3| |badge4| |badge5|
+
+This module extends the ``website`` and ``mass_mailing`` Odoo modules to
+prevent duplicates entries in ``mailing.contact`` tables.
+
+**Rational**
+
+In Odoo website, if the page contains Customer Form type = 'Subscribe to
+one (or many) newsletters', the form creates a new mailing.contact. That
+can generate annoying duplicates.
+
+This module prevent such duplicated entries, updating existing
+mailing.contact, if exists.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Known issues / Roadmap
+======================
+
+This module is a bugfix. When we use the other widget "Newsletters"
+(that is more simple), the widget doesn't create duplicates.
+
+To Do: check if this module is still necessary in more recent version of
+Odoo.
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/website/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/website/issues/new?body=module:%20website_mass_mailing_no_duplicate%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
+-------
+
+* GRAP
+
+Contributors
+------------
+
+- Sylvain LE GAL
+
+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.
+
+.. |maintainer-legalsylvain| image:: https://github.com/legalsylvain.png?size=40px
+    :target: https://github.com/legalsylvain
+    :alt: legalsylvain
+
+Current `maintainer <https://odoo-community.org/page/maintainer-role>`__:
+
+|maintainer-legalsylvain| 
+
+This module is part of the `OCA/website <https://github.com/OCA/website/tree/18.0/website_mass_mailing_no_duplicate>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

website_mass_mailing_no_duplicate/__init__.py

@@ -0,0 +1,2 @@
+from . import models
+from . import controllers

website_mass_mailing_no_duplicate/__manifest__.py

@@ -0,0 +1,14 @@
+# Copyright 2026 - Today: GRAP https://www.grap.coop
+# License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl.html).
+{
+    "name": "Website - Mass Mailing - No duplicates",
+    "summary": "Prevent duplicate of mailing contacts"
+    " when contact subscribes on the website",
+    "version": "18.0.1.0.0",
+    "author": "GRAP, Odoo Community Association (OCA)",
+    "maintainers": ["legalsylvain"],
+    "website": "https://github.com/OCA/website",
+    "license": "AGPL-3",
+    "category": "Website",
+    "depends": ["website_mass_mailing"],
+}

website_mass_mailing_no_duplicate/controllers/__init__.py

@@ -0,0 +1 @@
+from . import form

website_mass_mailing_no_duplicate/controllers/form.py

@@ -0,0 +1,12 @@
+from odoo.tools.misc import clean_context
+
+from odoo.addons.website.controllers import form
+
+
+class WebsiteForm(form.WebsiteForm):
+    def insert_record(self, request, model, values, custom, meta=None):
+        if model.model == "mailing.contact":
+            request.update_context(
+                **clean_context({"mailing_contact_from_website": True})
+            )
+        return super().insert_record(request, model, values, custom, meta=meta)

website_mass_mailing_no_duplicate/models/__init__.py

@@ -0,0 +1 @@
+from . import mailing_contact

website_mass_mailing_no_duplicate/models/mailing_contact.py

@@ -0,0 +1,49 @@
+# Copyright 2026 - Today: GRAP https://www.grap.coop
+# License LGPL-3.0 or later (http://www.gnu.org/licenses/lgpl.html).
+import logging
+
+from odoo import api, models, tools
+from odoo.fields import Command
+
+_logger = logging.getLogger(__name__)
+
+
+class MailingContact(models.Model):
+    _inherit = "mailing.contact"
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        if not self.env.context.get("mailing_contact_from_website", False):
+            return super().create(vals_list)
+        new_vals_list = []
+        all_existing_contacts = self
+        for vals in vals_list:
+            existing_contacts = self.search(
+                [("email_normalized", "=", tools.email_normalize(vals.get("email")))]
+            )
+            if existing_contacts:
+                new_list_ids = vals.get("list_ids")[0][2]
+                existing_list_ids = existing_contacts.mapped("list_ids").ids
+                to_add_list_ids = list(set(new_list_ids) - set(existing_list_ids))
+                all_existing_contacts |= existing_contacts[0]
+                if to_add_list_ids:
+                    _logger.info(
+                        f"mailing.contact #{existing_contacts[0].id}:"
+                        f" Adding new mailing list {to_add_list_ids}."
+                    )
+                    existing_contacts[0].write(
+                        {
+                            "list_ids": [
+                                (Command.link(list_id)) for list_id in to_add_list_ids
+                            ]
+                        }
+                    )
+                else:
+                    _logger.info(
+                        f"mailing.contact #{existing_contacts[0].id}:"
+                        " No mailing list to change."
+                    )
+            else:
+                new_vals_list.append(vals)
+
+        return super().create(new_vals_list) | all_existing_contacts

website_mass_mailing_no_duplicate/pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ["whool"]
+build-backend = "whool.buildapi"

website_mass_mailing_no_duplicate/readme/CONTRIBUTORS.md

@@ -0,0 +1 @@
+- Sylvain LE GAL

website_mass_mailing_no_duplicate/readme/DESCRIPTION.md

@@ -0,0 +1,9 @@
+This module extends the ``website`` and ``mass_mailing`` Odoo modules to prevent
+duplicates entries in ``mailing.contact`` tables.
+
+**Rational**
+
+In Odoo website, if the page contains Customer Form type = 'Subscribe to one (or many) newsletters', the form creates a new mailing.contact.
+That can generate annoying duplicates.
+
+This module prevent such duplicated entries, updating existing mailing.contact, if exists.

website_mass_mailing_no_duplicate/readme/ROADMAP.md

@@ -0,0 +1,5 @@
+This module is a bugfix. When we use the other widget "Newsletters"
+(that is more simple), the widget doesn't create duplicates.
+
+To Do: check if this module is still necessary in more recent
+version of Odoo.