Merge PR #1263 into 14.0

Signed-off-by sebalix

setup/stock_vertical_lift_empty_tray_check/odoo/addons/stock_vertical_lift_empty_tray_check

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+../../../../stock_vertical_lift_empty_tray_check

setup/stock_vertical_lift_empty_tray_check/setup.py

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+import setuptools
+
+setuptools.setup(
+    setup_requires=['setuptools-odoo'],
+    odoo_addon=True,
+)

stock_vertical_lift_empty_tray_check/README.rst

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+==============================
+Vertical Lift Empty Tray Check
+==============================
+
+.. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |badge1| image:: https://img.shields.io/badge/maturity-Alpha-red.png
+    :target: https://odoo-community.org/page/development-status
+    :alt: Alpha
+.. |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/13.0/stock_vertical_lift_empty_tray_check
+    :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-13-0/stock-logistics-warehouse-13-0-stock_vertical_lift_empty_tray_check
+    :alt: Translate me on Weblate
+.. |badge5| image:: https://img.shields.io/badge/runbot-Try%20me-875A7B.png
+    :target: https://runbot.odoo-community.org/runbot/153/13.0
+    :alt: Try me on Runbot
+
+|badge1| |badge2| |badge3| |badge4| |badge5| 
+
+When a tray is released, and the system thinks it is empty,
+it prompts the user to actually check that it is empty or not.
+In any case, an inventory adjustment is done stating the
+situation: posted to zero if the tray is actually empty, and
+set to draft is it is not empty.
+
+.. IMPORTANT::
+   This is an alpha version, the data model and design can change at any time without warning.
+   Only for development or testing purpose, do not use in production.
+   `More details on development status <https://odoo-community.org/page/development-status>`_
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Configuration
+=============
+
+General
+~~~~~~~
+
+In Inventory Settings, you must have activated the option: *Check Empty Tray*
+
+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_vertical_lift_empty_tray_check%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
+~~~~~~~
+
+* Camptocamp
+
+Contributors
+~~~~~~~~~~~~
+
+* Carlos Serra-Toro <carlos.serra@camptocamp.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/stock-logistics-warehouse <https://github.com/OCA/stock-logistics-warehouse/tree/13.0/stock_vertical_lift_empty_tray_check>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

stock_vertical_lift_empty_tray_check/__init__.py

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+# Copyright 2021 Camptocamp SA
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html)
+from . import models

stock_vertical_lift_empty_tray_check/__manifest__.py

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+# Copyright 2021 Camptocamp SA
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html)
+{
+    "name": "Vertical Lift Empty Tray Check",
+    "summary": "Checks if the tray is actually empty.",
+    "version": "14.0.1.0.0",
+    "category": "Stock",
+    "author": "Camptocamp, Odoo Community Association (OCA)",
+    "license": "AGPL-3",
+    "depends": ["stock", "stock_vertical_lift"],
+    "website": "https://github.com/OCA/stock-logistics-warehouse",
+    "data": [
+        "security/ir.model.access.csv",
+        "views/res_config_setting_views.xml",
+        "views/vertical_lift_operation_pick_zero_check_views.xml",
+    ],
+    "installable": True,
+    "development_status": "Alpha",
+}

stock_vertical_lift_empty_tray_check/i18n/stock_vertical_lift_empty_tray_check.pot

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+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+# 	* stock_vertical_lift_empty_tray_check
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 13.0\n"
+"Report-Msgid-Bugs-To: \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: stock_vertical_lift_empty_tray_check
+#: model:ir.model,name:stock_vertical_lift_empty_tray_check.model_res_config_settings
+msgid "Config Settings"
+msgstr ""
+
+#. module: stock_vertical_lift_empty_tray_check
+#: model:ir.model.fields,field_description:stock_vertical_lift_empty_tray_check.field_vertical_lift_operation_pick_zero_check__create_uid
+msgid "Created by"
+msgstr ""
+
+#. module: stock_vertical_lift_empty_tray_check
+#: model:ir.model.fields,field_description:stock_vertical_lift_empty_tray_check.field_vertical_lift_operation_pick_zero_check__create_date
+msgid "Created on"
+msgstr ""
+
+#. module: stock_vertical_lift_empty_tray_check
+#: model:ir.model.fields,field_description:stock_vertical_lift_empty_tray_check.field_vertical_lift_operation_pick_zero_check__display_name
+msgid "Display Name"
+msgstr ""
+
+#. module: stock_vertical_lift_empty_tray_check
+#: model:ir.model.fields,field_description:stock_vertical_lift_empty_tray_check.field_vertical_lift_operation_pick_zero_check__id
+msgid "ID"
+msgstr ""
+
+#. module: stock_vertical_lift_empty_tray_check
+#: model_terms:ir.ui.view,arch_db:stock_vertical_lift_empty_tray_check.res_config_settings_view_form
+msgid ""
+"If checked and the system thinks the vertical tray is\n"
+"                                empty, the operator will be asked to explicitly check\n"
+"                                if this is the case or not"
+msgstr ""
+
+#. module: stock_vertical_lift_empty_tray_check
+#: code:addons/stock_vertical_lift_empty_tray_check/models/vertical_lift_operation_pick.py:0
+#, python-format
+msgid "Is the tray empty?"
+msgstr ""
+
+#. module: stock_vertical_lift_empty_tray_check
+#: model:ir.model.fields,field_description:stock_vertical_lift_empty_tray_check.field_vertical_lift_operation_pick_zero_check____last_update
+msgid "Last Modified on"
+msgstr ""
+
+#. module: stock_vertical_lift_empty_tray_check
+#: model:ir.model.fields,field_description:stock_vertical_lift_empty_tray_check.field_vertical_lift_operation_pick_zero_check__write_uid
+msgid "Last Updated by"
+msgstr ""
+
+#. module: stock_vertical_lift_empty_tray_check
+#: model:ir.model.fields,field_description:stock_vertical_lift_empty_tray_check.field_vertical_lift_operation_pick_zero_check__write_date
+msgid "Last Updated on"
+msgstr ""
+
+#. module: stock_vertical_lift_empty_tray_check
+#: model:ir.model,name:stock_vertical_lift_empty_tray_check.model_vertical_lift_operation_pick_zero_check
+msgid "Make sure the tray location is empty"
+msgstr ""
+
+#. module: stock_vertical_lift_empty_tray_check
+#: model_terms:ir.ui.view,arch_db:stock_vertical_lift_empty_tray_check.vertical_lift_operation_pick_zero_check_view_form
+msgid "Tray Empty"
+msgstr ""
+
+#. module: stock_vertical_lift_empty_tray_check
+#: model_terms:ir.ui.view,arch_db:stock_vertical_lift_empty_tray_check.vertical_lift_operation_pick_zero_check_view_form
+msgid "Tray Not Empty"
+msgstr ""
+
+#. module: stock_vertical_lift_empty_tray_check
+#: model:ir.model,name:stock_vertical_lift_empty_tray_check.model_vertical_lift_operation_pick
+#: model:ir.model.fields,field_description:stock_vertical_lift_empty_tray_check.field_vertical_lift_operation_pick_zero_check__vertical_lift_operation_pick_id
+msgid "Vertical Lift Operation Pick"
+msgstr ""
+
+#. module: stock_vertical_lift_empty_tray_check
+#: model:ir.model.fields,field_description:stock_vertical_lift_empty_tray_check.field_res_config_settings__vertical_lift_empty_tray_check
+msgid "Vertical lift: Check Empty Tray"
+msgstr ""

stock_vertical_lift_empty_tray_check/models/__init__.py

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+# Copyright 2021 Camptocamp SA
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl)
+from . import res_config_settings
+from . import vertical_lift_operation_pick
+from . import vertical_lift_operation_pick_zero_check

stock_vertical_lift_empty_tray_check/models/res_config_settings.py

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+from odoo import fields, models
+
+
+class ResConfigSettings(models.TransientModel):
+    _inherit = "res.config.settings"
+
+    vertical_lift_empty_tray_check = fields.Boolean(
+        "Vertical lift: Check Empty Tray",
+        default=False,
+        config_parameter="vertical_lift_empty_tray_check",
+    )

stock_vertical_lift_empty_tray_check/models/vertical_lift_operation_pick.py

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+# Copyright 2019 Camptocamp SA
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import _, models
+from odoo.tools import float_is_zero
+
+
+class VerticalLiftOperationPick(models.Model):
+    _inherit = "vertical.lift.operation.pick"
+
+    def button_release(self):
+        """Release the operation, go to the next
+
+        By default it asks the user to inspect visually if the tray is empty.
+        """
+        icp = self.env["ir.config_parameter"].sudo()
+        tray_check = icp.get_param("vertical_lift_empty_tray_check")
+        skip_zero_quantity_check = self.env.context.get("skip_zero_quantity_check")
+        if not skip_zero_quantity_check and tray_check:
+            uom_rounding = self.product_id.uom_id.rounding
+            if float_is_zero(self.tray_qty, precision_rounding=uom_rounding):
+                return self._check_zero_quantity()
+
+        return super().button_release()
+
+    def _check_zero_quantity(self):
+        """Show the wizard to check for real-zero quantity."""
+        view = self.env.ref(
+            "stock_vertical_lift_empty_tray_check."
+            "vertical_lift_operation_pick_zero_check_view_form"
+        )
+        wizard_model = "vertical.lift.operation.pick.zero.check"
+        wizard = self.env[wizard_model].create(
+            {"vertical_lift_operation_pick_id": self.id}
+        )
+        return {
+            "name": _("Is the tray empty?"),
+            "type": "ir.actions.act_window",
+            "view_mode": "form",
+            "target": "new",
+            "views": [(view.id, "form")],
+            "view_id": view.id,
+            "res_model": wizard_model,
+            "res_id": wizard.id,
+            "context": self.env.context,
+        }

stock_vertical_lift_empty_tray_check/models/vertical_lift_operation_pick_zero_check.py

@@ -0,0 +1,87 @@
+# Copyright 2021 Camptocamp SA
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl)
+
+from odoo import _, fields, models
+
+
+class VerticalLiftOperationPickZeroCheck(models.TransientModel):
+    _name = "vertical.lift.operation.pick.zero.check"
+    _description = "Make sure the tray location is empty"
+
+    vertical_lift_operation_pick_id = fields.Many2one("vertical.lift.operation.pick")
+
+    def _get_data_from_operation(self):
+        """Return picking, location and product from the operation shuttle"""
+        operation = self.vertical_lift_operation_pick_id
+
+        # If the move is split into several move lines, it is
+        # moved to another picking, being a backorder of the
+        # original one. We are always interested in the original
+        # picking that was processed at first, so if the picking
+        # is a backorder of another picking, we take that other one.
+        picking = operation.picking_id.backorder_id or operation.picking_id
+        location = operation.current_move_line_id.location_id
+        product = operation.product_id
+        return operation, picking, location, product
+
+    def button_confirm_empty(self):
+        """User confirms the tray location is empty
+
+        This is in accordance with what we expected, because we only
+        call this action if we think the location is empty. We create
+        an inventory adjustment that states that a zero-check was
+        done for this location."""
+        operation, picking, location, product = self._get_data_from_operation()
+        inventory_name = _(f"Zero check in location: {location.complete_name}")
+        inventory = (
+            self.env["stock.inventory"]
+            .sudo()
+            .create(
+                {
+                    "name": inventory_name,
+                    "product_ids": [(4, product.id)],
+                    "location_ids": [(4, location.id)],
+                    "line_ids": [
+                        (
+                            0,
+                            0,
+                            {
+                                "product_id": product.id,
+                                "product_qty": 0,
+                                "theoretical_qty": 0,
+                                "location_id": location.id,
+                            },
+                        ),
+                    ],
+                }
+            )
+        )
+        inventory.action_start()
+        inventory.action_validate()
+
+        # Return to the execution of the release,
+        # but without checking again if the tray is empty.
+        return operation.with_context(skip_zero_quantity_check=True).button_release()
+
+    def button_confirm_not_empty(self):
+        """User confirms the tray location is not empty
+
+        This contradicts what we expected, because we only call this
+        action if we think the location is empty. We create a draft
+        inventory adjustment stating the mismatch.
+        """
+        operation, picking, location, product = self._get_data_from_operation()
+        inventory_name = _(
+            f"{picking.name} zero check issue on location {location.complete_name}"
+        )
+        self.env["stock.inventory"].sudo().create(
+            {
+                "name": inventory_name,
+                "product_ids": [(4, product.id)],
+                "location_ids": [(4, location.id)],
+            }
+        )
+
+        # Return to the execution of the release,
+        # but without checking again if the tray is empty.
+        return operation.with_context(skip_zero_quantity_check=True).button_release()

stock_vertical_lift_empty_tray_check/readme/CONFIGURE.rst

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+General
+~~~~~~~
+
+In Inventory Settings, you must have activated the option: *Check Empty Tray*

stock_vertical_lift_empty_tray_check/readme/CONTRIBUTORS.rst

@@ -0,0 +1 @@
+* Carlos Serra-Toro <carlos.serra@camptocamp.com>

stock_vertical_lift_empty_tray_check/readme/DESCRIPTION.rst

@@ -0,0 +1,5 @@
+When a tray is released, and the system thinks it is empty,
+it prompts the user to actually check that it is empty or not.
+In any case, an inventory adjustment is done stating the
+situation: posted to zero if the tray is actually empty, and
+set to draft is it is not empty.

stock_vertical_lift_empty_tray_check/security/ir.model.access.csv

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+id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
+access_vertical_lift_operation_pick_zero_check_stock_user,access_vertical_lift_operation_pick_zero_check_stock_user,model_vertical_lift_operation_pick_zero_check,stock.group_stock_user,1,1,1,1

stock_vertical_lift_empty_tray_check/static/description/index.html

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+  margin: 2em 4em }
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+
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+</head>
+<body>
+<div class="document" id="vertical-lift-empty-tray-check">
+<h1 class="title">Vertical Lift Empty Tray Check</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="Alpha" src="https://img.shields.io/badge/maturity-Alpha-red.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/13.0/stock_vertical_lift_empty_tray_check"><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-13-0/stock-logistics-warehouse-13-0-stock_vertical_lift_empty_tray_check"><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/153/13.0"><img alt="Try me on Runbot" src="https://img.shields.io/badge/runbot-Try%20me-875A7B.png" /></a></p>
+<p>When a tray is released, and the system thinks it is empty,
+it prompts the user to actually check that it is empty or not.
+In any case, an inventory adjustment is done stating the
+situation: posted to zero if the tray is actually empty, and
+set to draft is it is not empty.</p>
+<div class="admonition important">
+<p class="first admonition-title">Important</p>
+<p class="last">This is an alpha version, the data model and design can change at any time without warning.
+Only for development or testing purpose, do not use in production.
+<a class="reference external" href="https://odoo-community.org/page/development-status">More details on development status</a></p>
+</div>
+<p><strong>Table of contents</strong></p>
+<div class="contents local topic" id="contents">
+<ul class="simple">
+<li><a class="reference internal" href="#configuration" id="id1">Configuration</a><ul>
+<li><a class="reference internal" href="#general" id="id2">General</a></li>
+</ul>
+</li>
+<li><a class="reference internal" href="#bug-tracker" id="id3">Bug Tracker</a></li>
+<li><a class="reference internal" href="#credits" id="id4">Credits</a><ul>
+<li><a class="reference internal" href="#authors" id="id5">Authors</a></li>
+<li><a class="reference internal" href="#contributors" id="id6">Contributors</a></li>
+<li><a class="reference internal" href="#maintainers" id="id7">Maintainers</a></li>
+</ul>
+</li>
+</ul>
+</div>
+<div class="section" id="configuration">
+<h1><a class="toc-backref" href="#id1">Configuration</a></h1>
+<div class="section" id="general">
+<h2><a class="toc-backref" href="#id2">General</a></h2>
+<p>In Inventory Settings, you must have activated the option: <em>Check Empty Tray</em></p>
+</div>
+</div>
+<div class="section" id="bug-tracker">
+<h1><a class="toc-backref" href="#id3">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_vertical_lift_empty_tray_check%0Aversion:%2013.0%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="#id4">Credits</a></h1>
+<div class="section" id="authors">
+<h2><a class="toc-backref" href="#id5">Authors</a></h2>
+<ul class="simple">
+<li>Camptocamp</li>
+</ul>
+</div>
+<div class="section" id="contributors">
+<h2><a class="toc-backref" href="#id6">Contributors</a></h2>
+<ul class="simple">
+<li>Carlos Serra-Toro &lt;<a class="reference external" href="mailto:carlos.serra&#64;camptocamp.com">carlos.serra&#64;camptocamp.com</a>&gt;</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/13.0/stock_vertical_lift_empty_tray_check">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_vertical_lift_empty_tray_check/tests/__init__.py

@@ -0,0 +1,3 @@
+# Copyright 2021 Camptocamp SA
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html)
+from . import test_pick

stock_vertical_lift_empty_tray_check/tests/test_pick.py

@@ -0,0 +1,84 @@
+# Copyright 2021 Camptocamp SA
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html)
+
+from odoo.addons.stock_vertical_lift.tests.common import VerticalLiftCase
+
+
+class TestPick(VerticalLiftCase):
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        cls.env = cls.env(context=dict(cls.env.context, tracking_disable=True))
+        cls.picking_out = cls.env.ref(
+            "stock_vertical_lift.stock_picking_out_demo_vertical_lift_1"
+        )
+        cls.env["ir.config_parameter"].sudo().set_param(
+            "vertical_lift_empty_tray_check", True
+        )
+
+    def _test_location_empty_common(self, operation, tray_is_empty):
+        """Common part for tests checking the tray location is empty
+
+        Returns the new inventory adjustment created."""
+        self.assertEqual(operation.state, "scan_destination")
+        move_line = operation.current_move_line_id
+        customers_location = self.env.ref("stock.stock_location_customers")
+        customers_location.barcode = "CUSTOMERS"
+        operation.on_barcode_scanned(customers_location.barcode)
+        self.assertEqual(move_line.location_dest_id, customers_location)
+        self.assertEqual(operation.state, "save")
+        operation.button_save()
+        self.assertEqual(operation.state, "release")
+        self.assertEqual(operation.tray_qty, 0)
+
+        old_inventories = self.env["stock.inventory"].search([])
+
+        res_dict = operation.button_release()
+        wizard = self.env[(res_dict.get("res_model"))].browse(res_dict.get("res_id"))
+        wizard = wizard.with_context(
+            active_id=operation.id, active_model=operation._name
+        )
+        if tray_is_empty:
+            wizard.button_confirm_empty()
+        else:
+            wizard.button_confirm_not_empty()
+
+        new_inventory = self.env["stock.inventory"].search([]) - old_inventories
+        return new_inventory
+
+    def test_location_empty_is_empty(self):
+        """ Location is indicated as being empty, and it is"""
+        operation = self._open_screen("pick")
+        tray_location = operation.tray_location_id
+        tray_product = operation.current_move_line_id.product_id
+        inventory = self._test_location_empty_common(operation, tray_is_empty=True)
+
+        self.assertEqual(len(inventory), 1)
+        self.assertEqual(inventory.state, "done")
+        self.assertEqual(
+            inventory.name,
+            "Zero check in location: {}".format(tray_location.complete_name),
+        )
+        self.assertEqual(len(inventory.line_ids), 1)
+        self.assertEqual(inventory.line_ids[0].product_id, tray_product)
+        self.assertEqual(inventory.line_ids[0].location_id, tray_location)
+        self.assertEqual(inventory.line_ids[0].product_qty, 0)
+        self.assertEqual(inventory.line_ids[0].theoretical_qty, 0)
+
+    def test_location_empty_is_not_empty(self):
+        """Location is indicated as being empty, but it is not."""
+        operation = self._open_screen("pick")
+        tray_location = operation.tray_location_id
+        tray_product = operation.current_move_line_id.product_id
+        inventory = self._test_location_empty_common(operation, tray_is_empty=False)
+        self.assertEqual(len(inventory), 1)
+        self.assertEqual(inventory.state, "draft")
+        self.assertEqual(
+            inventory.name,
+            "{} zero check issue on location {}".format(
+                self.picking_out.name,
+                tray_location.complete_name,
+            ),
+        )
+        self.assertEqual(inventory.product_ids, tray_product)
+        self.assertEqual(inventory.location_ids, tray_location)

stock_vertical_lift_empty_tray_check/views/res_config_setting_views.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<odoo>
+    <data>
+        <record id="res_config_settings_view_form" model="ir.ui.view">
+            <field name="name">res.config.settings.view.form.inherit.stock</field>
+            <field name="model">res.config.settings</field>
+            <field name="priority" eval="30" />
+            <field name="inherit_id" ref="stock.res_config_settings_view_form" />
+            <field name="arch" type="xml">
+                <xpath
+                    expr="//field[@name='group_stock_adv_location']/ancestor::div[hasclass('o_setting_box')]"
+                    position="after"
+                >
+                    <div class="col-12 col-lg-6 o_setting_box">
+                        <div class="o_setting_left_pane">
+                            <field name="vertical_lift_empty_tray_check" />
+                        </div>
+                        <div class="o_setting_right_pane">
+                            <label for="vertical_lift_empty_tray_check" />
+                            <div class="text-muted">
+                                If checked and the system thinks the vertical tray is
+                                empty, the operator will be asked to explicitly check
+                                if this is the case or not
+                            </div>
+                        </div>
+                    </div>
+                </xpath>
+            </field>
+        </record>
+    </data>
+</odoo>

stock_vertical_lift_empty_tray_check/views/vertical_lift_operation_pick_zero_check_views.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!-- Copyright 2021 Camptocamp SA
+     License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl) -->
+<odoo>
+    <record id="vertical_lift_operation_pick_zero_check_view_form" model="ir.ui.view">
+        <field name="name">vertical.lift.operation.pick.zero.check.view.form</field>
+        <field name="model">vertical.lift.operation.pick.zero.check</field>
+        <field name="arch" type="xml">
+            <form>
+                <div class="row">
+                    <div class="col-6">
+                        <button
+                            name="button_confirm_empty"
+                            string="Tray Empty"
+                            type="object"
+                            class="btn-success"
+                            style="padding: 1em; font-size: 2em; text-transform: uppercase;"
+                        />
+                    </div>
+                    <div class="col-6">
+                        <button
+                            name="button_confirm_not_empty"
+                            string="Tray Not Empty"
+                            type="object"
+                            class="btn-danger"
+                            style="padding: 1em; font-size: 2em; text-transform: uppercase;"
+                        />
+                    </div>
+                </div>
+                <footer />
+            </form>
+        </field>
+    </record>
+</odoo>