[ADD] account_payment_order_by_partner: add new module

account_payment_order_by_partner/README.rst

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+================================
+Account Payment Order By Partner
+================================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
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+
+.. |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%2Fbank--payment-lightgray.png?logo=github
+    :target: https://github.com/OCA/bank-payment/tree/14.0/account_payment_order_by_partner
+    :alt: OCA/bank-payment
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/bank-payment-14-0/bank-payment-14-0-account_payment_order_by_partner
+    :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/bank-payment&target_branch=14.0
+    :alt: Try me on Runboat
+
+|badge1| |badge2| |badge3| |badge4| |badge5|
+
+This module enhances payment order functionality in Odoo by ensuring that all payment lines within a payment order belong to the same partner. This enforces stricter partner consistency and aligns with workflows that require one payment order per partner, improving data integrity and preventing inconsistent payments.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Usage
+=====
+
+This module introduces an option to restrict Payment Orders to a single partner.  
+To enable this feature:
+
+1. Go to **Invoicing > Configuration > Payment Modes**.
+2. In the desired Payment Mode, activate the checkbox **Individual Payment**.
+
+When this option is enabled, all move lines in a Payment Order must belong to the same partner. Any attempt to add lines from a different partner will result in a validation error.
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/bank-payment/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/bank-payment/issues/new?body=module:%20account_payment_order_by_partner%0Aversion:%2014.0%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
+~~~~~~~
+
+* Escodoo
+
+Contributors
+~~~~~~~~~~~~
+
+* `Escodoo <https://escodoo.com.br>`_:
+
+  * Marcel Savegnago <[email protected]>
+  * Kaynnan Lemes <[email protected]>
+
+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/bank-payment <https://github.com/OCA/bank-payment/tree/14.0/account_payment_order_by_partner>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

account_payment_order_by_partner/__init__.py

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+from . import models

account_payment_order_by_partner/__manifest__.py

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+# Copyright 2025 - TODAY, Escodoo
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+{
+    "name": "Account Payment Order By Partner",
+    "version": "14.0.1.0.0",
+    "license": "AGPL-3",
+    "author": "Escodoo, Odoo Community Association (OCA)",
+    "website": "https://github.com/OCA/bank-payment",
+    "depends": [
+        "account_payment_order",
+    ],
+    "data": [
+        "views/account_payment_mode.xml",
+    ],
+}

account_payment_order_by_partner/models/__init__.py

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+from . import account_move
+from . import account_payment_line
+from . import account_payment_mode
+from . import account_payment_order

account_payment_order_by_partner/models/account_move.py

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+# Copyright 2025 - TODAY, Kaynnan Lemes <[email protected]>
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import models
+
+
+class AccountMove(models.Model):
+
+    _inherit = "account.move"
+
+    def get_account_payment_domain(self, payment_mode):
+        domain = super().get_account_payment_domain(payment_mode)
+        if payment_mode.individual_payment:
+            domain.append(("payment_line_ids.partner_id", "=", self.partner_id.id))
+        return domain

account_payment_order_by_partner/models/account_payment_line.py

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+# Copyright 2025 - TODAY, Kaynnan Lemes <[email protected]>
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import _, api, models
+from odoo.exceptions import ValidationError
+
+
+class AccountPaymentLine(models.Model):
+
+    _inherit = "account.payment.line"
+
+    @api.constrains("partner_id", "order_id")
+    def _check_partner_consistency(self):
+        for line in self:
+            if line.order_id.payment_mode_id.individual_payment:
+                partners = line.order_id.payment_line_ids.mapped("partner_id")
+                if len(set(partners)) > 1:
+                    raise ValidationError(
+                        _(
+                            "The payment order contains lines with multiple partners. "
+                            "When the payment mode requires individual payments, "
+                            "all lines must belong to the same partner."
+                        )
+                    )

account_payment_order_by_partner/models/account_payment_mode.py

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+# Copyright 2025 - TODAY, Kaynnan Lemes <[email protected]>
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import fields, models
+
+
+class AccountPaymentMode(models.Model):
+
+    _inherit = "account.payment.mode"
+    individual_payment = fields.Boolean(
+        string="Individual Payment per Partner",
+        help="Enable this option to process payments individually"
+        " for this partner instead of combining them in a single payment order.",
+    )

account_payment_order_by_partner/models/account_payment_order.py

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+# Copyright 2025 - TODAY, Kaynnan Lemes <[email protected]>
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import _, models
+from odoo.exceptions import UserError
+
+
+class AccountPaymentOrder(models.Model):
+
+    _inherit = "account.payment.order"
+
+    def draft2open(self):
+        for order in self:
+            if order.payment_mode_id.individual_payment:
+                partners = order.payment_line_ids.mapped("partner_id")
+                if len(set(partners.ids)) > 1:
+                    raise UserError(
+                        _(
+                            "The Payment Mode '%s' requires individual payments. "
+                            "Ensure that all payment lines belong to the same partner."
+                        )
+                        % order.payment_mode_id.name
+                    )
+        super().draft2open()

account_payment_order_by_partner/readme/CONTRIBUTORS.rst

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+* `Escodoo <https://escodoo.com.br>`_:
+
+  * Marcel Savegnago <[email protected]>
+  * Kaynnan Lemes <[email protected]>

account_payment_order_by_partner/readme/DESCRIPTION.rst

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+This module enhances payment order functionality in Odoo by ensuring that all payment lines within a payment order belong to the same partner. This enforces stricter partner consistency and aligns with workflows that require one payment order per partner, improving data integrity and preventing inconsistent payments.

account_payment_order_by_partner/readme/USAGE.rst

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+This module introduces an option to restrict Payment Orders to a single partner.  
+To enable this feature:
+
+1. Go to **Invoicing > Configuration > Payment Modes**.
+2. In the desired Payment Mode, activate the checkbox **Individual Payment**.
+
+When this option is enabled, all move lines in a Payment Order must belong to the same partner. Any attempt to add lines from a different partner will result in a validation error.