[ADD] stock_location_product_restriction: Prevent to mix different products into the same stock location

stock_location_product_restriction/README.rst

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+==================================
+Stock Location Product Restriction
+==================================
+
+.. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! 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%2Fstock--logistics--warehouse-lightgray.png?logo=github
+    :target: https://github.com/OCA/stock-logistics-warehouse/tree/10.0/stock_location_product_restriction
+    :alt: OCA/stock-logistics-warehouse
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/stock-logistics-warehouse-10-0/stock-logistics-warehouse-10-0-stock_location_product_restriction
+    :alt: Translate me on Weblate
+.. |badge5| image:: https://img.shields.io/badge/runbot-Try%20me-875A7B.png
+    :target: https://runbot.odoo-community.org/runbot/153/10.0
+    :alt: Try me on Runbot
+
+|badge1| |badge2| |badge3| |badge4| |badge5| 
+
+This module extends the functionality of stock to allow you to prevent to put
+items of different products into the same stock location.
+
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Usage
+=====
+
+By default, Odoo allows you to put items of any product into the same location.
+This behaviour remains the one by default once the addon is installed.
+Once installed, you can specify at any level of the stock location hierarchy
+if you want to restrict the usage of the location to only items of the same
+product. This property is inherited by all the children locations while you
+don't specify an other specific value on a child location. The constrains only
+applies location by location.
+
+Once a location is configured to only contains items of the same product, the
+system will prevent you to move items of any others products into a location
+that already contains product items. A new filter into the tree view of the
+stock locations will also allow you to find all the location where this new
+restriction is violated.
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/stock-logistics-warehouse/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/stock-logistics-warehouse/issues/new?body=module:%20stock_location_product_restriction%0Aversion:%2010.0%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
+~~~~~~~
+
+* ACSONE SA/NV
+
+Contributors
+~~~~~~~~~~~~
+
+* Laurent Mignon <laurent.mignon@acsone.eu> (https://www.acsone.eu/)
+
+Other credits
+~~~~~~~~~~~~~
+
+The development of this module has been financially supported by:
+
+* ACSONE SA/NV
+* Alcyon Benelux
+
+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/stock-logistics-warehouse <https://github.com/OCA/stock-logistics-warehouse/tree/10.0/stock_location_product_restriction>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

stock_location_product_restriction/__init__.py

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+from . import models
+from .hooks import pre_init_hook

stock_location_product_restriction/__manifest__.py

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+# -*- coding: utf-8 -*-
+# Copyright 2020 ACSONE SA/NV
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+{
+    "name": "Stock Location Product Restriction",
+    "summary": """
+        Prevent to mix different products into the same stock location""",
+    "version": "10.0.1.0.0",
+    "license": "AGPL-3",
+    "author": "ACSONE SA/NV,Odoo Community Association (OCA)",
+    "website": "https://acsone.eu/",
+    "depends": ["stock"],
+    "data": ["views/stock_location.xml"],
+    "demo": [],
+    "pre_init_hook": "pre_init_hook",
+}

stock_location_product_restriction/hooks.py

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+# -*- coding: utf-8 -*-
+# Copyright 2020 ACSONE SA/NV
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html)
+
+import logging
+
+_logger = logging.getLogger(__name__)
+
+
+def column_exists(cr, tablename, columnname):
+    """ Return whether the given column exists. """
+    query = """ SELECT 1 FROM information_schema.columns
+                WHERE table_name=%s AND column_name=%s """
+    cr.execute(query, (tablename, columnname))
+    return cr.rowcount
+
+
+def pre_init_hook(cr):
+    _logger.info("Initialize product_restriction on table stock_location")
+    if not column_exists(cr, "stock_location", "product_restriction"):
+        cr.execute(
+            """
+            ALTER TABLE stock_location
+                ADD COLUMN product_restriction character varying;
+            ALTER TABLE stock_location
+                ADD COLUMN parent_product_restriction character varying;
+        """
+        )
+    cr.execute(
+        """
+        UPDATE stock_location set product_restriction = 'any';
+        UPDATE stock_location set parent_product_restriction = 'any'
+        where location_id is not null;
+    """
+    )

stock_location_product_restriction/models/__init__.py

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+from . import stock_location
+from . import stock_move

stock_location_product_restriction/models/stock_location.py

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+# -*- coding: utf-8 -*-
+# Copyright 2020 ACSONE SA/NV
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import api, fields, models, _
+from odoo.osv.expression import NEGATIVE_TERM_OPERATORS
+
+
+class StockLocation(models.Model):
+
+    _inherit = "stock.location"
+
+    product_restriction = fields.Selection(
+        string="Product restriction",
+        selection="_selection_product_restriction",
+        help="If 'Same product' is selected the system will prevent to put "
+        "items of different products into the same location.",
+        index=True,
+        required=True,
+        compute="_compute_product_restriction",
+        store=True,
+        default="any",
+    )
+
+    specific_product_restriction = fields.Selection(
+        string="Specific product restriction",
+        selection="_selection_product_restriction",
+        help="If specified the restriction specified will apply to "
+        "the current location and all its children",
+        default=False,
+    )
+
+    parent_product_restriction = fields.Selection(
+        selection="_selection_product_restriction",
+        store=True,
+        readonly=True,
+        related="location_id.product_restriction",
+    )
+
+    has_restriction_violation = fields.Boolean(
+        compute="_compute_restriction_violation",
+        search="_search_has_restriction_violation",
+    )
+
+    restriction_violation_message = fields.Char(
+        compute="_compute_restriction_violation"
+    )
+
+    @api.model
+    def _selection_product_restriction(self):
+        return [
+            ("any", "Items of any products are allowed into the location"),
+            (
+                "same",
+                "Only items of the same product allowed into the location",
+            ),
+        ]
+
+    @api.depends("specific_product_restriction", "parent_product_restriction")
+    def _compute_product_restriction(self):
+        default_value = "any"
+        for rec in self:
+            rec.product_restriction = (
+                rec.specific_product_restriction
+                or rec.parent_product_restriction
+                or default_value
+            )
+
+    @api.depends("product_restriction")
+    def _compute_restriction_violation(self):
+        records = self
+        if self.env.in_onchange:
+            records = self._origin
+        if not records:
+            # case where the compute is called from the create form
+            return
+        ProductProduct = self.env["product.product"]
+        SQL = """
+           SELECT
+               stock_quant.location_id,
+               array_agg(distinct(product_id))
+           FROM
+               stock_quant,
+               stock_location
+           WHERE
+               stock_quant.location_id in %s
+               and stock_location.id = stock_quant.location_id
+               and stock_location.product_restriction = 'same'
+           GROUP BY
+               stock_quant.location_id
+            HAVING count(distinct(product_id)) > 1
+       """
+        self.env.cr.execute(SQL, (tuple(records.ids),))
+        product_ids_by_location_id = dict(self.env.cr.fetchall())
+        for record in self:
+            record_id = record.id
+            if self.env.in_onchange:
+                record_id = self._origin.id
+            has_restriction_violation = False
+            restriction_violation_message = False
+            product_ids = product_ids_by_location_id.get(record_id)
+            if product_ids:
+                products = ProductProduct.browse(product_ids)
+                has_restriction_violation = True
+                restriction_violation_message = _(
+                    "This location should only contain items of the same "
+                    "product but it contains items of products %s"
+                ) % " | ".join(products.mapped("name"))
+            record.has_restriction_violation = has_restriction_violation
+            record.restriction_violation_message = (
+                restriction_violation_message
+            )
+
+    def _search_has_restriction_violation(self, operator, value):
+        search_has_violation = (
+            # has_restriction_violation != False
+            (operator in NEGATIVE_TERM_OPERATORS and not value)
+            or
+            # has_restriction_violation = True
+            (operator not in NEGATIVE_TERM_OPERATORS and value)
+        )
+        SQL = """
+            SELECT
+                stock_quant.location_id
+            FROM
+               stock_quant,
+               stock_location
+            WHERE
+               stock_location.id = stock_quant.location_id
+               and stock_location.product_restriction = 'same'
+            GROUP BY
+               stock_quant.location_id
+            HAVING count(distinct(product_id)) > 1
+        """
+        self.env.cr.execute(SQL)
+        violation_ids = [r[0] for r in self.env.cr.fetchall()]
+        if search_has_violation:
+            op = "in"
+        else:
+            op = "not in"
+        return [("id", op, violation_ids)]

stock_location_product_restriction/models/stock_move.py

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+# -*- coding: utf-8 -*-
+# Copyright 2020 ACSONE SA/NV
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from collections import defaultdict
+
+from odoo import api, models, _
+from odoo.exceptions import ValidationError
+
+
+class StockMove(models.Model):
+
+    _inherit = "stock.move"
+
+    @api.multi
+    def _check_location_product_restriction(self):
+        """
+        Check if the move can be executed according to potential restriction
+        defined on the stock_location
+        """
+        StockLocation = self.env["stock.location"]
+        ProductProduct = self.env["product.product"]
+        # We only check moves with a location_dest that can
+        # only contain the same product
+        moves_to_ckeck = self.filtered(
+            lambda m: m.location_dest_id.product_restriction == "same"
+        )
+        if not moves_to_ckeck:
+            return
+        product_ids_location_dest_id = defaultdict(set)
+        error_msgs = []
+        # check dest locations into the stock moves
+        for move in moves_to_ckeck:
+            product_ids_location_dest_id[move.location_dest_id.id].add(
+                move.product_id.id
+            )
+        for location_id, product_ids in product_ids_location_dest_id.items():
+            if len(product_ids) > 1:
+                location = StockLocation.browse(location_id)
+                products = ProductProduct.browse(list(product_ids))
+                error_msgs.append(
+                    _(
+                        "The location %s can only contain items of the same "
+                        "product. You plan to move different products to "
+                        "this location. (%s)"
+                    )
+                    % (location.name, ", ".join(products.mapped("name")))
+                )
+
+        # check dest locations by taking into account product already into the
+        # locations
+        # here we use a plain SQL to avoid performance issue
+        SQL = """
+            SELECT
+                location_id,
+                array_agg(distinct(product_id))
+            FROM
+                stock_quant
+            WHERE
+                location_id in %s
+            GROUP BY
+                location_id
+        """
+        self.env.cr.execute(
+            SQL, (tuple(moves_to_ckeck.mapped("location_dest_id").ids),)
+        )
+        existing_product_ids_by_location_id = dict(self.env.cr.fetchall())
+        for (
+            location_dest_id,
+            existing_product_ids,
+        ) in existing_product_ids_by_location_id.items():
+            product_ids_to_move = product_ids_location_dest_id[
+                location_dest_id
+            ]
+            if set(existing_product_ids).symmetric_difference(
+                product_ids_to_move
+            ):
+                location = StockLocation.browse(location_dest_id)
+                existing_products = ProductProduct.browse(existing_product_ids)
+                to_move_products = ProductProduct.browse(
+                    list(product_ids_to_move)
+                )
+                error_msgs.append(
+                    _(
+                        "You plan to move the product %s to the location %s "
+                        "but the location must only contain items of same "
+                        "product and already contains items of other "
+                        "product(s) "
+                        "(%s)."
+                    )
+                    % (
+                        " | ".join(to_move_products.mapped("name")),
+                        location.name,
+                        " | ".join(existing_products.mapped("name")),
+                    )
+                )
+        if error_msgs:
+            raise ValidationError("\n".join(error_msgs))
+
+    @api.multi
+    def action_done(self):
+        self._check_location_product_restriction()
+        return super(StockMove, self).action_done()

stock_location_product_restriction/readme/CONTRIBUTORS.rst

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+* Laurent Mignon <laurent.mignon@acsone.eu> (https://www.acsone.eu/)

stock_location_product_restriction/readme/CREDITS.rst

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+The development of this module has been financially supported by:
+
+* ACSONE SA/NV
+* Alcyon Benelux

stock_location_product_restriction/readme/DESCRIPTION.rst

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+This module extends the functionality of stock to allow you to prevent to put
+items of different products into the same stock location.

stock_location_product_restriction/readme/USAGE.rst

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+By default, Odoo allows you to put items of any product into the same location.
+This behaviour remains the one by default once the addon is installed.
+Once installed, you can specify at any level of the stock location hierarchy
+if you want to restrict the usage of the location to only items of the same
+product. This property is inherited by all the children locations while you
+don't specify an other specific value on a child location. The constrains only
+applies location by location.
+
+Once a location is configured to only contains items of the same product, the
+system will prevent you to move items of any others products into a location
+that already contains product items. A new filter into the tree view of the
+stock locations will also allow you to find all the location where this new
+restriction is violated.

stock_location_product_restriction/static/description/index.html

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+h4 tt.docutils, h5 tt.docutils, h6 tt.docutils {
+  font-size: 100% }
+
+ul.auto-toc {
+  list-style-type: none }
+
+</style>
+</head>
+<body>
+<div class="document" id="stock-location-product-restriction">
+<h1 class="title">Stock Location Product Restriction</h1>
+
+<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+!! This file is generated by oca-gen-addon-readme !!
+!! changes will be overwritten.                   !!
+!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
+<p><a class="reference external" href="https://odoo-community.org/page/development-status"><img alt="Beta" src="https://img.shields.io/badge/maturity-Beta-yellow.png" /></a> <a class="reference external" href="http://www.gnu.org/licenses/agpl-3.0-standalone.html"><img alt="License: AGPL-3" src="https://img.shields.io/badge/licence-AGPL--3-blue.png" /></a> <a class="reference external" href="https://github.com/OCA/stock-logistics-warehouse/tree/10.0/stock_location_product_restriction"><img alt="OCA/stock-logistics-warehouse" src="https://img.shields.io/badge/github-OCA%2Fstock--logistics--warehouse-lightgray.png?logo=github" /></a> <a class="reference external" href="https://translation.odoo-community.org/projects/stock-logistics-warehouse-10-0/stock-logistics-warehouse-10-0-stock_location_product_restriction"><img alt="Translate me on Weblate" src="https://img.shields.io/badge/weblate-Translate%20me-F47D42.png" /></a> <a class="reference external" href="https://runbot.odoo-community.org/runbot/153/10.0"><img alt="Try me on Runbot" src="https://img.shields.io/badge/runbot-Try%20me-875A7B.png" /></a></p>
+<p>This module extends the functionality of stock to allow you to prevent to put
+items of different products into the same stock location.</p>
+<p><strong>Table of contents</strong></p>
+<div class="contents local topic" id="contents">
+<ul class="simple">
+<li><a class="reference internal" href="#usage" id="id1">Usage</a></li>
+<li><a class="reference internal" href="#bug-tracker" id="id2">Bug Tracker</a></li>
+<li><a class="reference internal" href="#credits" id="id3">Credits</a><ul>
+<li><a class="reference internal" href="#authors" id="id4">Authors</a></li>
+<li><a class="reference internal" href="#contributors" id="id5">Contributors</a></li>
+<li><a class="reference internal" href="#other-credits" id="id6">Other credits</a></li>
+<li><a class="reference internal" href="#maintainers" id="id7">Maintainers</a></li>
+</ul>
+</li>
+</ul>
+</div>
+<div class="section" id="usage">
+<h1><a class="toc-backref" href="#id1">Usage</a></h1>
+<p>By default, Odoo allows you to put items of any product into the same location.
+This behaviour remains the one by default once the addon is installed.
+Once installed, you can specify at any level of the stock location hierarchy
+if you want to restrict the usage of the location to only items of the same
+product. This property is inherited by all the children locations while you
+don’t specify an other specific value on a child location. The constrains only
+applies location by location.</p>
+<p>Once a location is configured to only contains items of the same product, the
+system will prevent you to move items of any others products into a location
+that already contains product items. A new filter into the tree view of the
+stock locations will also allow you to find all the location where this new
+restriction is violated.</p>
+</div>
+<div class="section" id="bug-tracker">
+<h1><a class="toc-backref" href="#id2">Bug Tracker</a></h1>
+<p>Bugs are tracked on <a class="reference external" href="https://github.com/OCA/stock-logistics-warehouse/issues">GitHub Issues</a>.
+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
+<a class="reference external" href="https://github.com/OCA/stock-logistics-warehouse/issues/new?body=module:%20stock_location_product_restriction%0Aversion:%2010.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**">feedback</a>.</p>
+<p>Do not contact contributors directly about support or help with technical issues.</p>
+</div>
+<div class="section" id="credits">
+<h1><a class="toc-backref" href="#id3">Credits</a></h1>
+<div class="section" id="authors">
+<h2><a class="toc-backref" href="#id4">Authors</a></h2>
+<ul class="simple">
+<li>ACSONE SA/NV</li>
+</ul>
+</div>
+<div class="section" id="contributors">
+<h2><a class="toc-backref" href="#id5">Contributors</a></h2>
+<ul class="simple">
+<li>Laurent Mignon &lt;<a class="reference external" href="mailto:laurent.mignon&#64;acsone.eu">laurent.mignon&#64;acsone.eu</a>&gt; (<a class="reference external" href="https://www.acsone.eu/">https://www.acsone.eu/</a>)</li>
+</ul>
+</div>
+<div class="section" id="other-credits">
+<h2><a class="toc-backref" href="#id6">Other credits</a></h2>
+<p>The development of this module has been financially supported by:</p>
+<ul class="simple">
+<li>ACSONE SA/NV</li>
+<li>Alcyon Benelux</li>
+</ul>
+</div>
+<div class="section" id="maintainers">
+<h2><a class="toc-backref" href="#id7">Maintainers</a></h2>
+<p>This module is maintained by the OCA.</p>
+<a class="reference external image-reference" href="https://odoo-community.org"><img alt="Odoo Community Association" src="https://odoo-community.org/logo.png" /></a>
+<p>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.</p>
+<p>This module is part of the <a class="reference external" href="https://github.com/OCA/stock-logistics-warehouse/tree/10.0/stock_location_product_restriction">OCA/stock-logistics-warehouse</a> project on GitHub.</p>
+<p>You are welcome to contribute. To learn how please visit <a class="reference external" href="https://odoo-community.org/page/Contribute">https://odoo-community.org/page/Contribute</a>.</p>
+</div>
+</div>
+</div>
+</body>
+</html>

stock_location_product_restriction/tests/__init__.py

@@ -0,0 +1,2 @@
+from . import test_stock_location
+from . import test_stock_move

stock_location_product_restriction/tests/test_stock_location.py

@@ -0,0 +1,254 @@
+# -*- coding: utf-8 -*-
+# Copyright 2020 ACSONE SA/NV
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo.tests.common import SavepointCase
+
+
+class TestStockLocation(SavepointCase):
+    @classmethod
+    def setUpClass(cls):
+        super(TestStockLocation, cls).setUpClass()
+        cls.StockLocation = cls.env["stock.location"]
+        cls.StockLocation._parent_store_compute()
+        cls.loc_lvl = cls.env.ref("stock.stock_location_locations")
+        cls.loc_lvl_1 = cls.StockLocation.create(
+            {"name": "level_1", "location_id": cls.loc_lvl.id}
+        )
+        cls.loc_lvl_1_1 = cls.StockLocation.create(
+            {"name": "level_1_1", "location_id": cls.loc_lvl_1.id}
+        )
+
+        cls.loc_lvl_1_1_1 = cls.StockLocation.create(
+            {"name": "level_1_1_1", "location_id": cls.loc_lvl_1_1.id}
+        )
+        cls.loc_lvl_1_1_2 = cls.StockLocation.create(
+            {"name": "level_1_1_1", "location_id": cls.loc_lvl_1_1.id}
+        )
+        cls.default_product_restriction = "any"
+
+        # products
+        Product = cls.env["product.product"]
+        cls.uom_unit = cls.env.ref("product.product_uom_unit")
+        cls.product_1 = Product.create(
+            {"name": "Wood", "uom_id": cls.uom_unit.id}
+        )
+        cls.product_2 = Product.create(
+            {"name": "Stone", "uom_id": cls.uom_unit.id}
+        )
+
+        # quants
+        StockQuant = cls.env["stock.quant"]
+        StockQuant.create(
+            {
+                "product_id": cls.product_1.id,
+                "location_id": cls.loc_lvl_1_1_1.id,
+                "qty": 10.0,
+                "owner_id": cls.env.user.id,
+            }
+        )
+        StockQuant.create(
+            {
+                "product_id": cls.product_2.id,
+                "location_id": cls.loc_lvl_1_1_1.id,
+                "qty": 10.0,
+                "owner_id": cls.env.user.id,
+            }
+        )
+        StockQuant.create(
+            {
+                "product_id": cls.product_1.id,
+                "location_id": cls.loc_lvl_1_1_2.id,
+                "qty": 10.0,
+                "owner_id": cls.env.user.id,
+            }
+        )
+        StockQuant.create(
+            {
+                "product_id": cls.product_2.id,
+                "location_id": cls.loc_lvl_1_1_2.id,
+                "qty": 10.0,
+                "owner_id": cls.env.user.id,
+            }
+        )
+
+    def test_00(self):
+        """
+        Data:
+            A 3 depths location hierarchy without
+            specific_product_restriction
+        Test Case:
+            1. Specify a specific_product_restriction at root level
+        Expected result:
+            The value at each level must modified.
+        """
+        self.loc_lvl.specific_product_restriction = "same"
+        children = self.loc_lvl.child_ids
+
+        def check_field(locs, name):
+            for loc in locs:
+                self.assertEqual(
+                    name,
+                    loc.product_restriction,
+                    "Wrong product restriction on loc %s" % loc.name,
+                )
+                check_field(loc.child_ids, name)
+
+        check_field(children, "same")
+
+    def test_01(self):
+        """
+        Data:
+            A 3 depths location hierarchy without
+            specific_product_restriction
+        Test Case:
+            1. Specify a specific_product_restriction at level_1_1
+        Expected result:
+            The value at root level and level 1 is the default
+            The value at level_1_1 and level_1_1_1 is the new one
+        """
+        self.loc_lvl_1_1.specific_product_restriction = "same"
+        self.assertEqual(
+            self.default_product_restriction, self.loc_lvl.product_restriction,
+        )
+        self.assertEqual(
+            self.default_product_restriction,
+            self.loc_lvl_1.product_restriction,
+        )
+        self.assertEqual("same", self.loc_lvl_1_1.product_restriction)
+        self.assertEqual("same", self.loc_lvl_1_1_1.product_restriction)
+
+    def test_02(self):
+        """
+        Data:
+            Location level_1_1_1 with 2 different products no restriction
+            Location level_1_1_2 with 2 different products no restriction
+        Test Case:
+            1. Search location child of loc_lvl with restriction violation
+            2. Search location child of loc_lvl without restriction violation
+        Expected result:
+            1. No result
+            2. All child location are returned
+        """
+        self.loc_lvl_1_1_1.product_restriction = "any"
+        self.loc_lvl_1_1_2.product_restriction = "any"
+        # has violation
+        res = self.StockLocation.search(
+            [
+                ("id", "child_of", self.loc_lvl.id),
+                ("has_restriction_violation", "=", True),
+            ]
+        )
+        self.assertFalse(res)
+        res = self.StockLocation.search(
+            [
+                ("id", "child_of", self.loc_lvl.id),
+                ("has_restriction_violation", "!=", False),
+            ]
+        )
+        self.assertFalse(res)
+        # without violation
+        res = self.StockLocation.search(
+            [
+                ("id", "child_of", self.loc_lvl.id),
+                ("has_restriction_violation", "=", False),
+            ]
+        )
+        self.assertIn(self.loc_lvl_1_1_1, res)
+        self.assertIn(self.loc_lvl_1_1_2, res)
+        res = self.StockLocation.search(
+            [
+                ("id", "child_of", self.loc_lvl.id),
+                ("has_restriction_violation", "!=", True),
+            ]
+        )
+        self.assertIn(self.loc_lvl_1_1_1, res)
+        self.assertIn(self.loc_lvl_1_1_2, res)
+
+    def test_03(self):
+        """
+        Data:
+            * Location level_1_1_1 with 2 different products no restriction
+            * Location level_1_1_2 with 2 different products
+              with restriction same
+        Test Case:
+            1. Search location child of loc_lvl with restriction violation
+            2. Search location child of loc_lvl without restriction violation
+            3. Set restriction 'same' on location level_1_1_1
+            4. Search location child of loc_lvl with restriction violation
+        Expected result:
+            1. result = level_1_1_2
+            2. level_1_1_2 is not into result but level_1_1_1 is
+            4. result = level_1_1_2 and level_1_1_1
+        """
+        self.loc_lvl_1_1_1.product_restriction = "any"
+        self.loc_lvl_1_1_2.product_restriction = "same"
+        # 1
+        res = self.StockLocation.search(
+            [
+                ("id", "child_of", self.loc_lvl.id),
+                ("has_restriction_violation", "=", True),
+            ]
+        )
+        self.assertEqual(self.loc_lvl_1_1_2, res)
+        res = self.StockLocation.search(
+            [
+                ("id", "child_of", self.loc_lvl.id),
+                ("has_restriction_violation", "!=", False),
+            ]
+        )
+        self.assertEqual(self.loc_lvl_1_1_2, res)
+        # 2
+        res = self.StockLocation.search(
+            [
+                ("id", "child_of", self.loc_lvl.id),
+                ("has_restriction_violation", "=", False),
+            ]
+        )
+        self.assertIn(self.loc_lvl_1_1_1, res)
+        self.assertNotIn(self.loc_lvl_1_1_2, res)
+        res = self.StockLocation.search(
+            [
+                ("id", "child_of", self.loc_lvl.id),
+                ("has_restriction_violation", "!=", True),
+            ]
+        )
+        self.assertIn(self.loc_lvl_1_1_1, res)
+        self.assertNotIn(self.loc_lvl_1_1_2, res)
+        # 3
+        self.loc_lvl_1_1_1.product_restriction = "same"
+        self.loc_lvl_1_1_2.product_restriction = "same"
+        # 4
+        res = self.StockLocation.search(
+            [
+                ("id", "child_of", self.loc_lvl.id),
+                ("has_restriction_violation", "=", True),
+            ]
+        )
+        self.assertEqual(self.loc_lvl_1_1_2 | self.loc_lvl_1_1_1, res)
+        res = self.StockLocation.search(
+            [
+                ("id", "child_of", self.loc_lvl.id),
+                ("has_restriction_violation", "!=", False),
+            ]
+        )
+        self.assertEqual(self.loc_lvl_1_1_2 | self.loc_lvl_1_1_1, res)
+
+    def test_04(self):
+        """
+          Data:
+            * Location level_1_1_1 with 2 different products no restriction
+        Test Case:
+            1. Check restriction message
+            3. Set restriction 'same' on location level_1_1_1
+            4. Check restriction message
+        Expected result:
+            1. No restriction message
+            3. Retriction message
+        """
+        self.loc_lvl_1_1_1.product_restriction = "any"
+        self.assertFalse(self.loc_lvl_1_1_1.has_restriction_violation)
+        self.assertFalse(self.loc_lvl_1_1_1.restriction_violation_message)
+        self.loc_lvl_1_1_1.product_restriction = "same"
+        self.assertTrue(self.loc_lvl_1_1_1.has_restriction_violation)
+        self.assertTrue(self.loc_lvl_1_1_1.restriction_violation_message)

stock_location_product_restriction/tests/test_stock_move.py

@@ -0,0 +1,289 @@
+# -*- coding: utf-8 -*-
+# Copyright 2020 ACSONE SA/NV
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from collections import namedtuple
+
+from odoo.tests.common import SavepointCase
+from odoo.exceptions import ValidationError
+
+ShortMoveInfo = namedtuple(
+    "ShortMoveInfo", ["product", "location_dest", "qty"]
+)
+
+
+class TestStockMove(SavepointCase):
+    @classmethod
+    def setUpClass(cls):
+        """
+        Data:
+            2 products: product_1, product_2
+            1 new warehouse: warehouse_1
+            2 new locations: location_1 and location_2 are child of
+                             warehouse_1's stock location and without
+                             restriction
+            stock:
+                * 50 product_1 in location_1
+                * 0 product_2 en stock
+        """
+        super(TestStockMove, cls).setUpClass()
+        cls.uom_unit = cls.env.ref("product.product_uom_unit")
+        Product = cls.env["product.product"]
+        cls.product_1 = Product.create(
+            {"name": "Wood", "uom_id": cls.uom_unit.id}
+        )
+        cls.product_2 = Product.create(
+            {"name": "Stone", "uom_id": cls.uom_unit.id}
+        )
+
+        # Warehouses
+        cls.warehouse_1 = cls.env["stock.warehouse"].create(
+            {
+                "name": "Base Warehouse",
+                "reception_steps": "one_step",
+                "delivery_steps": "ship_only",
+                "code": "BWH",
+            }
+        )
+
+        # Locations
+        cls.location_1 = cls.env["stock.location"].create(
+            {
+                "name": "TestLocation1",
+                "posx": 3,
+                "location_id": cls.warehouse_1.lot_stock_id.id,
+            }
+        )
+
+        cls.location_2 = cls.env["stock.location"].create(
+            {
+                "name": "TestLocation2",
+                "posx": 4,
+                "location_id": cls.warehouse_1.lot_stock_id.id,
+            }
+        )
+
+        cls.supplier_location = cls.env.ref("stock.stock_location_suppliers")
+
+        # partner
+        cls.partner_1 = cls.env["res.partner"].create(
+            {"name": "ACSONE SA/NV", "email": "info@acsone.eu"}
+        )
+
+        # picking type
+        cls.picking_type_in = cls.env.ref("stock.picking_type_in")
+
+        # Inventory Add product_1 to location_1
+        cls._change_product_qty(cls.product_1, cls.location_1, 50)
+        cls.StockMove = cls.env["stock.move"]
+        cls.StockPicking = cls.env["stock.picking"]
+
+    @classmethod
+    def _change_product_qty(cls, product, location, qty):
+        inventory_wizard = cls.env["stock.change.product.qty"].create(
+            {
+                "product_id": product.id,
+                "new_quantity": qty,
+                "location_id": location.id,
+            }
+        )
+        inventory_wizard.change_product_qty()
+
+    def _get_products_in_location(self, location):
+        return (
+            self.env["stock.quant"]
+            .search([("location_id", "=", location.id)])
+            .mapped("product_id")
+        )
+
+    def _create_and_assign_picking(self, short_move_infos, location_dest=None):
+        location_dest = location_dest or self.location_1
+        picking_in = self.StockPicking.create(
+            {
+                "partner_id": self.partner_1.id,
+                "picking_type_id": self.picking_type_in.id,
+                "location_id": self.supplier_location.id,
+                "location_dest_id": location_dest.id,
+            }
+        )
+        for move_info in short_move_infos:
+            self.StockMove.create(
+                {
+                    "name": move_info.product.name,
+                    "product_id": move_info.product.id,
+                    "product_uom_qty": move_info.qty,
+                    "product_uom": move_info.product.uom_id.id,
+                    "picking_id": picking_in.id,
+                    "location_id": self.supplier_location.id,
+                    "location_dest_id": move_info.location_dest.id,
+                }
+            )
+        picking_in.action_confirm()
+        return picking_in
+
+    def _process_picking(self, picking):
+        picking.force_assign()
+        for pack in picking.pack_operation_product_ids:
+            pack.qty_done = pack.product_qty
+        picking.do_new_transfer()
+
+    def test_00(self):
+        """
+        Data:
+            location_1 without product_restriction
+            location_1 with 50 product_1
+        Test case:
+            Add qty of product_2 into location_1
+        Expected result:
+            The location contains the 2 products
+        """
+        self.assertEqual(
+            self.product_1, self._get_products_in_location(self.location_1)
+        )
+        self._change_product_qty(self.product_2, self.location_1, 10)
+        self.assertEqual(
+            self.product_1 | self.product_2,
+            self._get_products_in_location(self.location_1),
+        )
+
+    def test_01(self):
+        """
+        Data:
+            location_1 with same product restriction
+            location_1 with 50 product_1
+        Test case:
+            Add qty of product_2 into location_1
+        Expected result:
+            ValidationError
+        """
+        self.assertEqual(
+            self.product_1, self._get_products_in_location(self.location_1)
+        )
+        self.location_1.specific_product_restriction = "same"
+        with self.assertRaises(ValidationError):
+            self._change_product_qty(self.product_2, self.location_1, 10)
+
+    def test_02(self):
+        """
+        Data:
+            location_2 without product nor product restriction
+            a picking with two move with destination location_2
+        Test case:
+            Process the picking
+        Expected result:
+            The two product are into location 2
+        """
+        picking = self._create_and_assign_picking(
+            [
+                ShortMoveInfo(
+                    product=self.product_1,
+                    location_dest=self.location_2,
+                    qty=2,
+                ),
+                ShortMoveInfo(
+                    product=self.product_2,
+                    location_dest=self.location_2,
+                    qty=2,
+                ),
+            ],
+            location_dest=self.location_2,
+        )
+        self._process_picking(picking)
+        self.assertEqual(
+            self.product_1 | self.product_2,
+            self._get_products_in_location(self.location_2),
+        )
+
+    def test_03(self):
+        """
+        Data:
+            location_2 without product but with product restriction = 'same'
+            a picking with two move with destination location_2
+        Test case:
+            Process the picking
+        Expected result:
+            ValidationError
+        """
+        self.location_2.specific_product_restriction = "same"
+        picking = self._create_and_assign_picking(
+            [
+                ShortMoveInfo(
+                    product=self.product_1,
+                    location_dest=self.location_2,
+                    qty=2,
+                ),
+                ShortMoveInfo(
+                    product=self.product_2,
+                    location_dest=self.location_2,
+                    qty=2,
+                ),
+            ],
+            location_dest=self.location_2,
+        )
+        with self.assertRaises(ValidationError):
+            self._process_picking(picking)
+
+    def test_04(self):
+        """
+        Data:
+            location_1 with product_1 and wihout product restriction = 'same'
+            a picking with two moves:
+             * product_1 -> location_1,
+             * product_2 -> location_1
+        Test case:
+            Process the picking
+        Expected result:
+            We now have two product into the same location
+        """
+        self.assertEqual(
+            self.product_1, self._get_products_in_location(self.location_1),
+        )
+        self.location_1.specific_product_restriction = "any"
+        picking = self._create_and_assign_picking(
+            [
+                ShortMoveInfo(
+                    product=self.product_1,
+                    location_dest=self.location_1,
+                    qty=2,
+                ),
+                ShortMoveInfo(
+                    product=self.product_2,
+                    location_dest=self.location_1,
+                    qty=2,
+                ),
+            ],
+            location_dest=self.location_1,
+        )
+        self._process_picking(picking)
+        self.assertEqual(
+            self.product_1 | self.product_2,
+            self._get_products_in_location(self.location_1),
+        )
+
+    def test_05(self):
+        """
+        Data:
+            location_1 with product_1 but with product restriction = 'same'
+            a picking with one move: product_2 -> location_1
+        Test case:
+            Process the picking
+        Expected result:
+            ValidationError
+        """
+
+        self.assertEqual(
+            self.product_1, self._get_products_in_location(self.location_1),
+        )
+        self.location_1.specific_product_restriction = "same"
+        picking = self._create_and_assign_picking(
+            [
+                ShortMoveInfo(
+                    product=self.product_2,
+                    location_dest=self.location_1,
+                    qty=2,
+                ),
+            ],
+            location_dest=self.location_1,
+        )
+        with self.assertRaises(ValidationError):
+            self._process_picking(picking)

stock_location_product_restriction/views/stock_location.xml

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2020 ACSONE SA/NV
+     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl). -->
+
+<odoo>
+
+    <record model="ir.ui.view" id="stock_location_form_view">
+        <field name="name">stock.location.form (in stock_location_unique_product)</field>
+        <field name="model">stock.location</field>
+        <field name="inherit_id" ref="stock.view_location_form"/>
+        <field name="arch" type="xml">
+            <div name="button_box" position="after">
+                <div
+                  class="alert alert-danger"
+                  role="alert"
+                  attrs="{'invisible': [('restriction_violation_message','=',False)]}"
+                ><field name="restriction_violation_message" />
+                </div>
+            </div>
+            <xpath expr="//group[last()]">
+                <group name="restrictions" string="Restrictions">
+                    <field name="product_restriction"/>
+                    <field name="specific_product_restriction" class="oe_edit_only"/>
+                </group>
+            </xpath>
+        </field>
+    </record>
+
+    <record model="ir.ui.view" id="stock_location_search_view">
+        <field name="name">stock.location.search (in stock_location_unique_product)</field>
+        <field name="model">stock.location</field>
+        <field name="inherit_id" ref="stock.view_location_search"/>
+        <field name="arch" type="xml">
+            <filter name="inactive" position="after">
+                <filter string="With restriction violation" name="has_restriction_violation" domain="[('has_restriction_violation','=',True)]"/>
+            </filter>
+        </field>
+    </record>
+
+    <record model="ir.ui.view" id="stock_location_tree_view">
+        <field name="name">stock.location.tree (in stock_location_unique_product)</field>
+        <field name="model">stock.location</field>
+        <field name="inherit_id" ref="stock.view_location_tree2"/>
+        <field name="arch" type="xml">
+            <field name="company_id" position="before">
+                <field name="has_restriction_violation"/>
+            </field>
+        </field>
+    </record>
+
+</odoo>