[ADD] purchase_order_qty_change_no_recompute: Prevent recompute if on…

…ly quantity has changed in sale order line

purchase_order_qty_change_no_recompute/README.rst

@@ -0,0 +1,94 @@
+======================================
+Purchase Order Qty change no recompute
+======================================
+
+.. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |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%2Fpurchase--workflow-lightgray.png?logo=github
+    :target: https://github.com/OCA/purchase-workflow/tree/13.0/purchase_order_qty_change_no_recompute
+    :alt: OCA/purchase-workflow
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/purchase-workflow-13-0/purchase-workflow-13-0-purchase_order_qty_change_no_recompute
+    :alt: Translate me on Weblate
+.. |badge5| image:: https://img.shields.io/badge/runbot-Try%20me-875A7B.png
+    :target: https://runbot.odoo-community.org/runbot/142/13.0
+    :alt: Try me on Runbot
+
+|badge1| |badge2| |badge3| |badge4| |badge5| 
+
+This module prevents to recompute if only quantity has changed in purchase order line.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Usage
+=====
+
+To use this module, you need to:
+
+#. Create a new purchase order.
+#. Add product line and set custom unit price.
+#. Save purchase order.
+#. Edit purchase order and change quantity (custom unit price not been reset).
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/purchase-workflow/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us smashing it by providing a detailed and welcomed
+`feedback <https://github.com/OCA/purchase-workflow/issues/new?body=module:%20purchase_order_qty_change_no_recompute%0Aversion:%2013.0%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
+~~~~~~~
+
+* Tecnativa
+
+Contributors
+~~~~~~~~~~~~
+
+* `Tecnativa <https://www.tecnativa.com>`_:
+
+  * Víctor Martínez
+  * Pedro M. Baeza
+
+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-victoralmau| image:: https://github.com/victoralmau.png?size=40px
+    :target: https://github.com/victoralmau
+    :alt: victoralmau
+
+Current `maintainer <https://odoo-community.org/page/maintainer-role>`__:
+
+|maintainer-victoralmau| 
+
+This module is part of the `OCA/purchase-workflow <https://github.com/OCA/purchase-workflow/tree/13.0/purchase_order_qty_change_no_recompute>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

purchase_order_qty_change_no_recompute/__init__.py

@@ -0,0 +1,3 @@
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from . import models

purchase_order_qty_change_no_recompute/__manifest__.py

@@ -0,0 +1,14 @@
+# Copyright 2021 Tecnativa - Víctor Martínez
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+{
+    "name": "Purchase Order Qty change no recompute",
+    "summary": "Prevent recompute if only quantity has changed in purchase order line",
+    "version": "13.0.1.0.0",
+    "category": "Purchases",
+    "website": "https://github.com/OCA/purchase-workflow",
+    "author": "Tecnativa, Odoo Community Association (OCA)",
+    "license": "AGPL-3",
+    "installable": True,
+    "depends": ["purchase"],
+    "maintainers": ["victoralmau"],
+}

purchase_order_qty_change_no_recompute/i18n/purchase_order_qty_change_no_recompute.pot

@@ -0,0 +1,21 @@
+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+# 	* purchase_order_qty_change_no_recompute
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 13.0\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2021-08-30 06:35+0000\n"
+"PO-Revision-Date: 2021-08-30 06:35+0000\n"
+"Last-Translator: \n"
+"Language-Team: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: \n"
+"Plural-Forms: \n"
+
+#. module: purchase_order_qty_change_no_recompute
+#: model:ir.model,name:purchase_order_qty_change_no_recompute.model_purchase_order_line
+msgid "Purchase Order Line"
+msgstr ""

purchase_order_qty_change_no_recompute/models/__init__.py

@@ -0,0 +1,3 @@
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from . import purchase_order

purchase_order_qty_change_no_recompute/models/purchase_order.py

@@ -0,0 +1,28 @@
+# Copyright 2021 Tecnativa - Víctor Martínez
+# Copyright 2021 Tecnativa - Pedro M. Baeza
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import models
+from odoo.tools import config
+
+
+class PurchaseOrderLine(models.Model):
+    _inherit = "purchase.order.line"
+
+    def _onchange_eval(self, field_name, onchange, result):
+        """Remove the trigger for the undesired onchange method with this field.
+        We have to act at this place, as `_onchange_methods` is defined as a
+        property, and thus it can't be inherited due to the conflict of
+        inheritance between Python and Odoo ORM, so we can consider this as a HACK.
+        """
+        ctx = self.env.context
+        if field_name == "product_qty" and (
+            not config["test_enable"]
+            or (config["test_enable"] and ctx.get("prevent_onchange_quantity", False))
+        ):
+            cls = type(self)
+            for method in self._onchange_methods.get(field_name, ()):
+                if method == cls._onchange_quantity:
+                    self._onchange_methods[field_name].remove(method)
+                    break
+        return super()._onchange_eval(field_name, onchange, result)

purchase_order_qty_change_no_recompute/readme/CONTRIBUTORS.rst

@@ -0,0 +1,4 @@
+* `Tecnativa <https://www.tecnativa.com>`_:
+
+  * Víctor Martínez
+  * Pedro M. Baeza

purchase_order_qty_change_no_recompute/readme/DESCRIPTION.rst

@@ -0,0 +1 @@
+This module prevents to recompute if only quantity has changed in purchase order line.

purchase_order_qty_change_no_recompute/readme/USAGE.rst

@@ -0,0 +1,6 @@
+To use this module, you need to:
+
+#. Create a new purchase order.
+#. Add product line and set custom unit price.
+#. Save purchase order.
+#. Edit purchase order and change quantity (custom unit price not been reset).