details:   https://code.tryton.org/tryton/commit/10536a0481df
branch:    default
user:      Cédric Krier <[email protected]>
date:      Sat Mar 28 13:40:06 2026 +0100
description:
        Manage ethanol in stock
diffstat:

 .gitlab-ci-modules.yml                                           |   34 +
 doc/production.rst                                               |    3 +
 doc/stock.rst                                                    |    3 +
 modules/production_ethanol/COPYRIGHT                             |   15 +
 modules/production_ethanol/LICENSE                               |  674 
++++++++++
 modules/production_ethanol/README.rst                            |    1 +
 modules/production_ethanol/__init__.py                           |    2 +
 modules/production_ethanol/doc/conf.py                           |  111 +
 modules/production_ethanol/doc/design.rst                        |   18 +
 modules/production_ethanol/doc/index.rst                         |   12 +
 modules/production_ethanol/doc/releases.rst                      |    7 +
 modules/production_ethanol/doc/requirements-doc.txt              |    3 +
 modules/production_ethanol/production.py                         |   83 +
 modules/production_ethanol/production.xml                        |   12 +
 modules/production_ethanol/pyproject.toml                        |   59 +
 modules/production_ethanol/tests/__init__.py                     |    2 +
 modules/production_ethanol/tests/scenario_production_ethanol.rst |  105 +
 modules/production_ethanol/tests/test_module.py                  |   11 +
 modules/production_ethanol/tests/test_scenario.py                |    8 +
 modules/production_ethanol/tox.ini                               |   24 +
 modules/production_ethanol/tryton.cfg                            |   12 +
 modules/production_ethanol/view/production_form.xml              |    9 +
 modules/stock/product.py                                         |    2 -
 modules/stock_ethanol/COPYRIGHT                                  |   15 +
 modules/stock_ethanol/LICENSE                                    |  674 
++++++++++
 modules/stock_ethanol/README.rst                                 |    1 +
 modules/stock_ethanol/__init__.py                                |    2 +
 modules/stock_ethanol/doc/conf.py                                |  111 +
 modules/stock_ethanol/doc/design.rst                             |   32 +
 modules/stock_ethanol/doc/index.rst                              |   11 +
 modules/stock_ethanol/doc/releases.rst                           |    7 +
 modules/stock_ethanol/doc/requirements-doc.txt                   |    3 +
 modules/stock_ethanol/message.xml                                |   16 +
 modules/stock_ethanol/product.py                                 |  175 ++
 modules/stock_ethanol/product.xml                                |   24 +
 modules/stock_ethanol/pyproject.toml                             |   59 +
 modules/stock_ethanol/stock.py                                   |  221 +++
 modules/stock_ethanol/stock.xml                                  |   42 +
 modules/stock_ethanol/tests/__init__.py                          |    2 +
 modules/stock_ethanol/tests/scenario_stock_ethanol.rst           |  118 +
 modules/stock_ethanol/tests/test_module.py                       |   12 +
 modules/stock_ethanol/tests/test_scenario.py                     |    8 +
 modules/stock_ethanol/tox.ini                                    |   24 +
 modules/stock_ethanol/tryton.cfg                                 |   22 +
 modules/stock_ethanol/view/product_product_list.xml              |   10 +
 modules/stock_ethanol/view/product_template_form.xml             |   18 +
 modules/stock_ethanol/view/product_template_list.xml             |   11 +
 modules/stock_ethanol/view/stock_configuration_form.xml          |   10 +
 modules/stock_ethanol/view/stock_move_form.xml                   |   14 +
 modules/stock_ethanol/view/stock_move_list.xml                   |   13 +
 modules/stock_ethanol/view/stock_products_by_locations_list.xml  |    8 +
 51 files changed, 2871 insertions(+), 2 deletions(-)

diffs (3110 lines):

diff -r d74a1f4d766f -r 10536a0481df .gitlab-ci-modules.yml
--- a/.gitlab-ci-modules.yml    Sat Dec 13 17:21:23 2025 +0100
+++ b/.gitlab-ci-modules.yml    Sat Mar 28 13:40:06 2026 +0100
@@ -2011,6 +2011,23 @@
     PACKAGE: modules/production
     TAG_PATTERN: '/^production-.*/'
 
+check-doc-modules-production_ethanol:
+  extends: .check-doc
+  variables:
+    PACKAGE: modules/production_ethanol
+
+test-modules-production_ethanol-sqlite:
+  extends: .test-sqlite
+  variables:
+    PACKAGE: modules/production_ethanol
+    TAG_PATTERN: '/^production_ethanol-.*/'
+
+test-modules-production_ethanol-postgresql:
+  extends: .test-postgresql
+  variables:
+    PACKAGE: modules/production_ethanol
+    TAG_PATTERN: '/^production_ethanol-.*/'
+
 check-doc-modules-production_outsourcing:
   extends: .check-doc
   variables:
@@ -3048,6 +3065,23 @@
     PACKAGE: modules/stock_consignment
     TAG_PATTERN: '/^stock_consignment-.*/'
 
+check-doc-modules-stock_ethanol:
+  extends: .check-doc
+  variables:
+    PACKAGE: modules/stock_ethanol
+
+test-modules-stock_ethanol-sqlite:
+  extends: .test-sqlite
+  variables:
+    PACKAGE: modules/stock_ethanol
+    TAG_PATTERN: '/^stock_ethanol-.*/'
+
+test-modules-stock_ethanol-postgresql:
+  extends: .test-postgresql
+  variables:
+    PACKAGE: modules/stock_ethanol
+    TAG_PATTERN: '/^stock_ethanol-.*/'
+
 check-doc-modules-stock_forecast:
   extends: .check-doc
   variables:
diff -r d74a1f4d766f -r 10536a0481df doc/production.rst
--- a/doc/production.rst        Sat Dec 13 17:21:23 2025 +0100
+++ b/doc/production.rst        Sat Mar 28 13:40:06 2026 +0100
@@ -8,6 +8,9 @@
 :doc:`Production <production:index>`
    Fundamentals for production management.
 
+:doc:`Ethanol <production_ethanol:index>`
+   Track produced ethanol.
+
 :doc:`Outsourcing <production_outsourcing:index>`
    Outsource the production.
 
diff -r d74a1f4d766f -r 10536a0481df doc/stock.rst
--- a/doc/stock.rst     Sat Dec 13 17:21:23 2025 +0100
+++ b/doc/stock.rst     Sat Mar 28 13:40:06 2026 +0100
@@ -14,6 +14,9 @@
 :doc:`Consignment <stock_consignment:index>`
    Manage consignment stock from supplier or at customer warehouse.
 
+:doc:`Ethanol <stock_ethanol:index>`
+   Track ethanol in stock.
+
 :doc:`Forecast <stock_forecast:index>`
    Forecast the stock levels.
 
diff -r d74a1f4d766f -r 10536a0481df modules/production_ethanol/COPYRIGHT
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/COPYRIGHT      Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,15 @@
+Copyright (C) 2022 B2CK SRL
+Copyright (C) 2022 Cédric Krier <[email protected]>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
diff -r d74a1f4d766f -r 10536a0481df modules/production_ethanol/LICENSE
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/LICENSE        Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
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+  10. Automatic Licensing of Downstream Recipients.
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+  You may not impose any further restrictions on the exercise of the
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+  11. Patents.
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+  A contributor's "essential patent claims" are all patent claims
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+  If you convey a covered work, knowingly relying on a patent license,
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+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
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+  If, pursuant to or in connection with a single transaction or
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+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
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+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
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+  16. Limitation of Liability.
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+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff -r d74a1f4d766f -r 10536a0481df modules/production_ethanol/README.rst
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/README.rst     Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,1 @@
+doc/index.rst
\ No newline at end of file
diff -r d74a1f4d766f -r 10536a0481df modules/production_ethanol/__init__.py
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/__init__.py    Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,2 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
diff -r d74a1f4d766f -r 10536a0481df modules/production_ethanol/doc/conf.py
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/doc/conf.py    Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,111 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+
+import os
+
+base_url = os.environ.get('DOC_BASE_URL')
+if base_url:
+    modules_url = base_url + '/modules-{module}/'
+    trytond_url = base_url + '/server/'
+else:
+    modules_url = (
+        'https://docs.tryton.org/{series}/modules-{module}/')
+    trytond_url = 'https://docs.tryton.org/{series}/server/'
+
+
+def get_info():
+    import configparser
+    import json
+    import subprocess
+
+    module_dir = os.path.dirname(os.path.dirname(__file__))
+
+    config = configparser.ConfigParser()
+    config.read_file(open(os.path.join(module_dir, 'tryton.cfg')))
+    info = dict(config.items('tryton'))
+
+    metadata_cmd = 'python3 -m build -qq --metadata'
+    if os.environ.get('DOC_NO_ISOLATION'):
+        metadata_cmd += ' --no-isolation'
+    metadata = subprocess.check_output(
+        metadata_cmd, shell=True, encoding='utf-8', cwd=module_dir).strip()
+    metadata = json.loads(metadata)
+    info['name'] = metadata['name']
+    info['description'] = metadata['summary']
+    major_version, minor_version, _ = metadata['version'].split('.', 2)
+    major_version = int(major_version)
+    minor_version = int(minor_version)
+    if minor_version % 2:
+        info['series'] = 'latest'
+        info['branch'] = 'branch/default'
+    else:
+        info['series'] = '.'.join(version.split('.', 2)[:2])
+        info['branch'] = 'branch/' + info['series']
+
+    for key in {'depends', 'extras_depend'}:
+        info[key] = info.get(key, '').strip().splitlines()
+    info['modules'] = set(info['depends'] + info['extras_depend'])
+    info['modules'] -= {'ir', 'res'}
+
+    return info
+
+
+info = get_info()
+
+html_theme = 'sphinx_book_theme'
+html_theme_options = {
+    'logo': {
+        'alt_text': "Tryton Documentation",
+        'image_light': 'https://docs.tryton.org/logo-light.svg',
+        'image_dark': 'https://docs.tryton.org/logo-dark.svg',
+        'link': base_url,
+        },
+    'home_page_in_toc': True,
+    'repository_provider': 'gitlab',
+    'repository_url': 'https://code.tryton.org/tryton',
+    'repository_branch': info['branch'],
+    'use_source_button': True,
+    'use_edit_page_button': True,
+    'use_repository_button': True,
+    'use_download_button': False,
+    'path_to_docs': 'modules/production_ethanol/doc',
+    }
+html_title = info['description']
+master_doc = 'index'
+project = info['name']
+release = version = info['series']
+default_role = 'ref'
+highlight_language = 'none'
+exclude_patterns = ['**/*.inc.rst']
+extensions = [
+    'sphinx_copybutton',
+    'sphinx.ext.intersphinx',
+    ]
+intersphinx_mapping = {
+    'trytond': (trytond_url.format(series=version), None),
+    }
+intersphinx_mapping.update({
+        m: (modules_url.format(
+                module=m.replace('_', '-'), series=version), None)
+        for m in info['modules']
+        })
+linkcheck_ignore = [r'/.*', r'https://demo.tryton.org/*']
+linkcheck_request_headers = {
+    'User-Agent': (
+        'TrytonBot/0.0 (https://www.tryton.org/foundation) '
+        'sphinx-linkcheck/0.0'),
+    'Accept-Encoding': 'gzip',
+    }
+linkcheck_workers = 1
+
+try:
+    with open(os.path.join(
+                os.path.dirname(__file__),
+                'linkcheck_ignore.json'), 'r') as f:
+        import json
+        linkcheck_ignore.extend(json.load(f))
+        del json
+except FileNotFoundError:
+    pass
+
+del get_info, info, base_url, modules_url, trytond_url
diff -r d74a1f4d766f -r 10536a0481df modules/production_ethanol/doc/design.rst
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/doc/design.rst Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,18 @@
+******
+Design
+******
+
+The *Production Ethanol Module* introduces or extends the following concepts.
+
+.. _model-production:
+
+Production
+==========
+
+When the *Production Ethanol Module* is activated, the *Production* gains a new
+property that calculates the volume of alcohol gained or lost.
+
+.. seealso::
+
+   The `Production <production:model-production>` concept is introduced by the
+   :doc:`Production Module <production:index>`.
diff -r d74a1f4d766f -r 10536a0481df modules/production_ethanol/doc/index.rst
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/doc/index.rst  Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,12 @@
+#########################
+Production Ethanol Module
+#########################
+
+The *Production Ethanol Module* calculates the gain or loss of alcohol volumes
+in production.
+
+.. toctree::
+   :maxdepth: 2
+
+   design
+   releases
diff -r d74a1f4d766f -r 10536a0481df modules/production_ethanol/doc/releases.rst
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/doc/releases.rst       Sat Mar 28 13:40:06 
2026 +0100
@@ -0,0 +1,7 @@
+.. _releases-index:
+
+=============
+Release notes
+=============
+
+.. include:: ../CHANGELOG
diff -r d74a1f4d766f -r 10536a0481df 
modules/production_ethanol/doc/requirements-doc.txt
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/doc/requirements-doc.txt       Sat Mar 28 
13:40:06 2026 +0100
@@ -0,0 +1,3 @@
+build
+sphinx_book_theme
+sphinx_copybutton
diff -r d74a1f4d766f -r 10536a0481df modules/production_ethanol/production.py
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/production.py  Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,83 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+
+from collections import defaultdict
+from itertools import groupby
+
+from sql import Null
+from sql.aggregate import Sum
+from sql.conditionals import Coalesce
+
+from trytond.model import fields
+from trytond.pool import Pool, PoolMeta
+from trytond.tools import grouped_slice
+from trytond.transaction import Transaction
+
+
+class Production(metaclass=PoolMeta):
+    __name__ = 'production'
+
+    ethanol_volume = fields.Function(
+        fields.Float(
+            "Alcohol Volume", digits='ethanol_volume_unit',
+            help="The volume of ethanol/alcohol gained or lost."),
+        'get_ethanol_volume')
+    ethanol_volume_unit = fields.Function(
+        fields.Many2One('product.uom', "Alcohol Volume UoM"),
+        'get_ethanol_volume_unit')
+
+    @classmethod
+    def get_ethanol_volume(cls, productions, name):
+        pool = Pool()
+        Configuration = pool.get('stock.configuration')
+        configuration = Configuration(1)
+        UoM = pool.get('product.uom')
+        ModelData = pool.get('ir.model.data')
+        Move = pool.get('stock.move')
+
+        move = Move.__table__()
+        cursor = Transaction().connection.cursor()
+
+        liter = UoM(ModelData.get_id('product', 'uom_liter'))
+        production = Coalesce(move.production_input, move.production_output)
+        query = move.select(
+            production,
+            Coalesce(Sum(
+                    move.internal_ethanol_volume,
+                    filter_=move.production_output != Null), 0)
+            - Coalesce(Sum(
+                    move.internal_ethanol_volume,
+                    filter_=move.production_input != Null), 0),
+            group_by=[production])
+
+        ethanol_volumes = defaultdict(int)
+        for sub_productions in grouped_slice(productions):
+            sub_production_ids = [p.id for p in sub_productions]
+            query.where = (
+                move.production_input.in_(sub_production_ids)
+                | move.production_output.in_(sub_production_ids))
+            cursor.execute(*query)
+            ethanol_volumes.update(cursor)
+
+        for company, production in groupby(
+                productions, key=lambda p: p.company):
+            uom = configuration.get_multivalue(
+                'ethanol_volume_uom', company=company.id)
+            for production in productions:
+                ethanol_volumes[production.id] = UoM.compute_qty(
+                    liter, ethanol_volumes[production.id], uom)
+        return ethanol_volumes
+
+    @classmethod
+    def get_ethanol_volume_unit(cls, productions, name):
+        pool = Pool()
+        Configuration = pool.get('stock.configuration')
+        configuration = Configuration(1)
+        units = {}
+        for company, productions in groupby(
+                productions, key=lambda m: m.company):
+            uom = configuration.get_multivalue(
+                'ethanol_volume_uom', company=company.id)
+            for production in productions:
+                units[production.id] = uom.id
+        return units
diff -r d74a1f4d766f -r 10536a0481df modules/production_ethanol/production.xml
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/production.xml Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<tryton>
+    <data>
+        <record model="ir.ui.view" id="production_view_form">
+            <field name="model">production</field>
+            <field name="inherit" ref="production.production_view_form"/>
+            <field name="name">production_form</field>
+        </record>
+    </data>
+</tryton>
diff -r d74a1f4d766f -r 10536a0481df modules/production_ethanol/pyproject.toml
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/pyproject.toml Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,59 @@
+[build-system]
+requires = ['hatchling >= 1', 'hatch-tryton']
+build-backend = 'hatchling.build'
+
+[project]
+name = 'trytond_production_ethanol'
+dynamic = ['version', 'dependencies', 'optional-dependencies', 'authors', 
'readme']
+requires-python = '>=3.10'
+maintainers = [
+    {name = "Tryton", email = "[email protected]"},
+    ]
+description = "Ethanol production for Tryton"
+license = 'GPL-3.0-or-later'
+license-files = ['LICENSE', 'icons/LICENSE', 'COPYRIGHT']
+keywords = ["tryton", "production", "ethanol", "alcohol"]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Environment :: Plugins",
+    "Framework :: Tryton",
+    "Topic :: Office/Business",
+    "Topic :: Software Development :: Libraries :: Python Modules",
+    ]
+
+[project.entry-points.'trytond.modules']
+production_ethanol = 'trytond.modules.production_ethanol'
+
+[project.urls]
+homepage = "https://www.tryton.org/";
+documentation = "https://docs.tryton.org/modules-production-ethanol/";
+changelog = "https://docs.tryton.org/modules-production-ethanol/releases.html";
+forum = "https://www.tryton.org/forum";
+issues = "https://bugs.tryton.org/tryton";
+repository = "https://code.tryton.org/tryton";
+funding = "https://www.tryton.org/donate";
+
+[tool.hatch.build]
+include = [
+    '**/tryton.cfg',
+    '**/*.py',
+    '**/*.xml',
+    'view/**/*.xml',
+    'locale/**/*.po',
+    '**/*.fodt',
+    'icons/**/*.svg',
+    'tests/**/*.rst',
+    'tests/**/*.json',
+    ]
+exclude = ['doc']
+
+[tool.hatch.build.targets.wheel.sources]
+"" = "trytond/modules/production_ethanol"
+
+[tool.hatch.metadata.hooks.tryton]
+dependencies = ['python-sql']
+copyright = 'COPYRIGHT'
+readme = 'README.rst'
+
+[tool.hatch.metadata.hooks.tryton.tryton-optional-dependencies]
+test = ['proteus']
diff -r d74a1f4d766f -r 10536a0481df 
modules/production_ethanol/tests/__init__.py
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/tests/__init__.py      Sat Mar 28 13:40:06 
2026 +0100
@@ -0,0 +1,2 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
diff -r d74a1f4d766f -r 10536a0481df 
modules/production_ethanol/tests/scenario_production_ethanol.rst
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/tests/scenario_production_ethanol.rst  Sat Mar 
28 13:40:06 2026 +0100
@@ -0,0 +1,105 @@
+===========================
+Production Ethanol Scenario
+===========================
+
+Imports::
+
+    >>> from decimal import Decimal
+
+    >>> from proteus import Model
+    >>> from trytond.modules.company.tests.tools import create_company, 
get_company
+    >>> from trytond.tests.tools import activate_modules
+
+Activate modules::
+
+    >>> config = activate_modules('production_ethanol')
+
+    >>> Location = Model.get('stock.location')
+    >>> ProductTemplate = Model.get('product.template')
+    >>> Production = Model.get('production')
+    >>> ProductionConfiguration = Model.get('production.configuration')
+    >>> Uom = Model.get('product.uom')
+
+Create company::
+
+    >>> _ = create_company()
+    >>> company = get_company()
+
+Get stock locations::
+
+    >>> storage_loc, = Location.find([('code', '=', 'STO')])
+    >>> production_loc, = Location.find([('code', '=', 'PROD')])
+
+Create products::
+
+    >>> liter, = Uom.find([('name', '=', "Liter")])
+    >>> kg, = Uom.find([('name', '=', "Kilogram")])
+    >>> unit, = Uom.find([('name', '=', "Unit")])
+
+    >>> template = ProductTemplate()
+    >>> template.name = "Cork"
+    >>> template.default_uom = unit
+    >>> template.type = 'goods'
+    >>> template.contain_ethanol = False
+    >>> template.save()
+    >>> cork, = template.products
+
+    >>> template = ProductTemplate()
+    >>> template.name = "Distillate"
+    >>> template.default_uom = liter
+    >>> template.type = 'goods'
+    >>> template.list_price = Decimal('20.0000')
+    >>> template.contain_ethanol = True
+    >>> template.ethanol_by_volume = 0.5
+    >>> template.save()
+    >>> distillate, = template.products
+
+    >>> template = ProductTemplate()
+    >>> template.name = "Water"
+    >>> template.default_uom = liter
+    >>> template.type = 'goods'
+    >>> template.consumable = True
+    >>> template.save()
+    >>> water, = template.products
+
+    >>> template = ProductTemplate()
+    >>> template.name = "Bottle"
+    >>> template.default_uom = liter
+    >>> template.type = 'goods'
+    >>> template.list_price = Decimal('20.0000')
+    >>> template.contain_ethanol = True
+    >>> template.ethanol_by_volume = 0.1
+    >>> template.save()
+    >>> bottle, = template.products
+
+Make a production of bottle::
+
+    >>> production = Production()
+    >>> input = production.inputs.new()
+    >>> input.product = distillate
+    >>> input.quantity = 3
+    >>> input.from_location = storage_loc
+    >>> input.to_location = production_loc
+    >>> input = production.inputs.new()
+    >>> input.product = cork
+    >>> input.quantity = 10
+    >>> input.from_location = storage_loc
+    >>> input.to_location = production_loc
+    >>> input = production.inputs.new()
+    >>> input.product = water
+    >>> input.quantity = 8
+    >>> input.from_location = storage_loc
+    >>> input.to_location = production_loc
+    >>> output = production.outputs.new()
+    >>> output.product = bottle
+    >>> output.quantity = 10
+    >>> output.from_location = production_loc
+    >>> output.to_location = storage_loc
+    >>> output.unit_price = Decimal('20.0000')
+    >>> output.currency = company.currency
+    >>> production.save()
+
+Check ethanol volume::
+
+    >>> production.ethanol_volume
+    -0.5
diff -r d74a1f4d766f -r 10536a0481df 
modules/production_ethanol/tests/test_module.py
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/tests/test_module.py   Sat Mar 28 13:40:06 
2026 +0100
@@ -0,0 +1,11 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+from trytond.tests.test_tryton import ModuleTestCase
+
+
+class ProductionEthanolTestCase(ModuleTestCase):
+    "Test Production Ethanol module"
+    module = 'production_ethanol'
+
+
+del ModuleTestCase
diff -r d74a1f4d766f -r 10536a0481df 
modules/production_ethanol/tests/test_scenario.py
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/tests/test_scenario.py Sat Mar 28 13:40:06 
2026 +0100
@@ -0,0 +1,8 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+
+from trytond.tests.test_tryton import load_doc_tests
+
+
+def load_tests(*args, **kwargs):
+    return load_doc_tests(__name__, __file__, *args, **kwargs)
diff -r d74a1f4d766f -r 10536a0481df modules/production_ethanol/tox.ini
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/tox.ini        Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,24 @@
+[tox]
+envlist = {py310,py311,py312,py313,py314}-{sqlite,postgresql}
+
+[testenv]
+changedir = {env_site_packages_dir}
+extras = test
+commands =
+    coverage run --rcfile={toxinidir}/tox.ini 
--source=trytond.modules.production_ethanol --omit=*/tests/* -m xmlrunner 
discover -s trytond.modules.production_ethanol {posargs}
+commands_post =
+    coverage report --rcfile={toxinidir}/tox.ini
+    coverage xml --rcfile={toxinidir}/tox.ini -o {package_root}/coverage.xml
+deps =
+    coverage
+    unittest-xml-reporting
+    postgresql: psycopg[pool] >= 3
+passenv = *
+setenv =
+    sqlite: TRYTOND_DATABASE_URI={env:SQLITE_URI:sqlite://}
+    postgresql: TRYTOND_DATABASE_URI={env:POSTGRESQL_URI:postgresql://}
+    sqlite: DB_NAME={env:DB_NAME::memory:}
+    postgresql: DB_NAME={env:DB_NAME:test}
+
+[coverage:run]
+relative_files = true
diff -r d74a1f4d766f -r 10536a0481df modules/production_ethanol/tryton.cfg
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/tryton.cfg     Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,12 @@
+[tryton]
+version=7.9.0
+depends:
+    ir
+    production
+    stock_ethanol
+xml:
+    production.xml
+
+[register]
+model:
+    production.Production
diff -r d74a1f4d766f -r 10536a0481df 
modules/production_ethanol/view/production_form.xml
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/production_ethanol/view/production_form.xml       Sat Mar 28 
13:40:06 2026 +0100
@@ -0,0 +1,9 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<data>
+    <xpath expr="//field[@name='cost']" position="after">
+        <label name="ethanol_volume"/>
+        <field name="ethanol_volume" symbol="ethanol_volume_unit"/>
+    </xpath>
+</data>
diff -r d74a1f4d766f -r 10536a0481df modules/stock/product.py
--- a/modules/stock/product.py  Sat Dec 13 17:21:23 2025 +0100
+++ b/modules/stock/product.py  Sat Mar 28 13:40:06 2026 +0100
@@ -112,8 +112,6 @@
         'sum_product')
 
     def sum_product(self, name):
-        if name not in ('quantity', 'forecast_quantity', 'cost_value'):
-            raise Exception('Bad argument')
         sum_ = 0. if name != 'cost_value' else Decimal(0)
         for product in self.products:
             sum_ += getattr(product, name) or 0
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/COPYRIGHT
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/COPYRIGHT   Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,15 @@
+Copyright (C) 2022 B2CK SRL
+Copyright (C) 2022 Cédric Krier <[email protected]>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/LICENSE
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/LICENSE     Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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+any other work released this way by its authors.  You can apply it to
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+  Additional terms, permissive or non-permissive, may be stated in the
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+  8. Termination.
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+  You may not propagate or modify a covered work except as expressly
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+this License (including any patent licenses granted under the third
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+
+  However, if you cease all violation of this License, then your
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+  Termination of your rights under this section does not terminate the
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+  9. Acceptance Not Required for Having Copies.
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+  You may not impose any further restrictions on the exercise of the
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+  11. Patents.
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+
+  A patent license is "discriminatory" if it does not include within
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+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
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+to collect a royalty for further conveying from those to whom you convey
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+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
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+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
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+
+  Each version is given a distinguishing version number.  If the
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+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
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+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
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+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
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+  16. Limitation of Liability.
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+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
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+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
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+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
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+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/README.rst
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/README.rst  Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,1 @@
+doc/index.rst
\ No newline at end of file
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/__init__.py
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/__init__.py Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,2 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/doc/conf.py
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/doc/conf.py Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,111 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+
+import os
+
+base_url = os.environ.get('DOC_BASE_URL')
+if base_url:
+    modules_url = base_url + '/modules-{module}/'
+    trytond_url = base_url + '/server/'
+else:
+    modules_url = (
+        'https://docs.tryton.org/{series}/modules-{module}/')
+    trytond_url = 'https://docs.tryton.org/{series}/server/'
+
+
+def get_info():
+    import configparser
+    import json
+    import subprocess
+
+    module_dir = os.path.dirname(os.path.dirname(__file__))
+
+    config = configparser.ConfigParser()
+    config.read_file(open(os.path.join(module_dir, 'tryton.cfg')))
+    info = dict(config.items('tryton'))
+
+    metadata_cmd = 'python3 -m build -qq --metadata'
+    if os.environ.get('DOC_NO_ISOLATION'):
+        metadata_cmd += ' --no-isolation'
+    metadata = subprocess.check_output(
+        metadata_cmd, shell=True, encoding='utf-8', cwd=module_dir).strip()
+    metadata = json.loads(metadata)
+    info['name'] = metadata['name']
+    info['description'] = metadata['summary']
+    major_version, minor_version, _ = metadata['version'].split('.', 2)
+    major_version = int(major_version)
+    minor_version = int(minor_version)
+    if minor_version % 2:
+        info['series'] = 'latest'
+        info['branch'] = 'branch/default'
+    else:
+        info['series'] = '.'.join(version.split('.', 2)[:2])
+        info['branch'] = 'branch/' + info['series']
+
+    for key in {'depends', 'extras_depend'}:
+        info[key] = info.get(key, '').strip().splitlines()
+    info['modules'] = set(info['depends'] + info['extras_depend'])
+    info['modules'] -= {'ir', 'res'}
+
+    return info
+
+
+info = get_info()
+
+html_theme = 'sphinx_book_theme'
+html_theme_options = {
+    'logo': {
+        'alt_text': "Tryton Documentation",
+        'image_light': 'https://docs.tryton.org/logo-light.svg',
+        'image_dark': 'https://docs.tryton.org/logo-dark.svg',
+        'link': base_url,
+        },
+    'home_page_in_toc': True,
+    'repository_provider': 'gitlab',
+    'repository_url': 'https://code.tryton.org/tryton',
+    'repository_branch': info['branch'],
+    'use_source_button': True,
+    'use_edit_page_button': True,
+    'use_repository_button': True,
+    'use_download_button': False,
+    'path_to_docs': 'modules/stock_ethanol/doc',
+    }
+html_title = info['description']
+master_doc = 'index'
+project = info['name']
+release = version = info['series']
+default_role = 'ref'
+highlight_language = 'none'
+exclude_patterns = ['**/*.inc.rst']
+extensions = [
+    'sphinx_copybutton',
+    'sphinx.ext.intersphinx',
+    ]
+intersphinx_mapping = {
+    'trytond': (trytond_url.format(series=version), None),
+    }
+intersphinx_mapping.update({
+        m: (modules_url.format(
+                module=m.replace('_', '-'), series=version), None)
+        for m in info['modules']
+        })
+linkcheck_ignore = [r'/.*', r'https://demo.tryton.org/*']
+linkcheck_request_headers = {
+    'User-Agent': (
+        'TrytonBot/0.0 (https://www.tryton.org/foundation) '
+        'sphinx-linkcheck/0.0'),
+    'Accept-Encoding': 'gzip',
+    }
+linkcheck_workers = 1
+
+try:
+    with open(os.path.join(
+                os.path.dirname(__file__),
+                'linkcheck_ignore.json'), 'r') as f:
+        import json
+        linkcheck_ignore.extend(json.load(f))
+        del json
+except FileNotFoundError:
+    pass
+
+del get_info, info, base_url, modules_url, trytond_url
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/doc/design.rst
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/doc/design.rst      Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,32 @@
+******
+Design
+******
+
+The *Stock Ethanol Module* introduces or extends the following concepts.
+
+.. _model-stock.move:
+
+Move
+====
+
+When the *Stock Ethanol Module* is activated, the stock *Move* gains new
+properties that calculate the volume of alcohol moved.
+
+.. seealso::
+
+   The `Move <stock:model-stock.move>` concept is introduced by the :doc:`Stock
+   Module <stock:index>`.
+
+.. _concept-product:
+
+Product
+=======
+
+When the *Stock Ethanol Module* is activated, the *Product* concept gains new
+properties that define whether the product contains alcohol and its volume per
+`unit <product:model-product.uom>`.
+
+.. seealso::
+
+   The `Product <product:concept-product>` concept is introduced by the
+   :doc:`Product Module <product:index>`.
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/doc/index.rst
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/doc/index.rst       Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,11 @@
+####################
+Stock Ethanol Module
+####################
+
+The *Stock Ethanol Module* helps to track alcohol in warehouses.
+
+.. toctree::
+   :maxdepth: 2
+
+   design
+   releases
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/doc/releases.rst
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/doc/releases.rst    Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,7 @@
+.. _releases-index:
+
+=============
+Release notes
+=============
+
+.. include:: ../CHANGELOG
diff -r d74a1f4d766f -r 10536a0481df 
modules/stock_ethanol/doc/requirements-doc.txt
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/doc/requirements-doc.txt    Sat Mar 28 13:40:06 
2026 +0100
@@ -0,0 +1,3 @@
+build
+sphinx_book_theme
+sphinx_copybutton
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/message.xml
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/message.xml Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,16 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<tryton>
+    <data grouped="1">
+        <record model="ir.message" 
id="msg_move_internal_ethanol_volume_positive">
+            <field name="text">Internal ethanol volume must be 
positive.</field>
+        </record>
+        <record model="ir.message" id="msg_product_change_contain_ethanol">
+            <field name="text">You cannot change the contain alcohol of a 
product which is associated with stock moves.</field>
+        </record>
+        <record model="ir.message" id="msg_product_change_ethanol_by_volume">
+            <field name="text">You cannot change the alcohol by volume of a 
product which is associated with stock moves.</field>
+        </record>
+    </data>
+</tryton>
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/product.py
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/product.py  Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,175 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+
+from sql.conditionals import Coalesce
+
+from trytond.model import fields
+from trytond.pool import Pool, PoolMeta
+from trytond.pyson import Eval, If
+
+
+class Template(metaclass=PoolMeta):
+    __name__ = 'product.template'
+
+    contain_ethanol = fields.Boolean(
+        "Contain Alcohol",
+        states={
+            'invisible': Eval('type', 'goods') != 'goods',
+            },
+        help="Check if goods contain ethanol/alcohol.")
+    ethanol_by_volume = fields.Float(
+        "Alcohol By Volume", digits=(1, 4),
+        domain=[If(Eval('contain_ethanol'),
+                ['OR',
+                    [
+                        ('ethanol_by_volume', '>=', 0),
+                        ('ethanol_by_volume', '<=', 1),
+                        ],
+                    ('ethanol_by_volume', '=', None),
+                    ],
+                [('ethanol_by_volume', '=', None)])],
+        states={
+            'invisible': ~Eval('contain_ethanol'),
+            },
+        help="How much ethanol/alcohol is contained "
+        "in a given volume at 20°C.")
+    ethanol_volume = fields.Function(
+        fields.Float(
+            "Alcohol Volume", digits='ethanol_volume_unit',
+            help="The volume of ethanol/alcohol in the location."),
+        'sum_product')
+    ethanol_volume_unit = fields.Function(
+        fields.Many2One(
+            'product.uom', "Alcohol Volume UoM",
+            states={
+                'invisible': ~Eval('ethanol_volume'),
+                }),
+        'get_ethanol_volume_unit')
+
+    @classmethod
+    def __setup__(cls):
+        super().__setup__()
+        cls._modify_no_move += [
+            ('contain_ethanol',
+                'stock_ethanol.msg_product_change_contain_ethanol'),
+            ('ethanol_by_volume',
+                'stock_ethanol.msg_product_change_ethanol_by_volume'),
+            ]
+
+    @classmethod
+    def get_ethanol_volume_unit(cls, templates, name):
+        pool = Pool()
+        Configuration = pool.get('stock.configuration')
+        configuration = Configuration(1)
+        uom = configuration.get_multivalue('ethanol_volume_uom')
+        return dict.fromkeys(map(int, templates), uom.id)
+
+    @classmethod
+    def view_attributes(cls):
+        return super().view_attributes() + [
+            ('//page[@id="ethanol"]', 'states', {
+                    'invisible': ~Eval('contain_ethanol'),
+                    }),
+            ]
+
+
+class Product(metaclass=PoolMeta):
+    __name__ = 'product.product'
+
+    ethanol_by_volume = fields.Float(
+        "Alcohol By Volume", digits=(1, 4),
+        domain=[If(Eval('contain_ethanol'),
+                ['OR',
+                    [
+                        ('ethanol_by_volume', '>=', 0),
+                        ('ethanol_by_volume', '<=', 1),
+                        ],
+                    ('ethanol_by_volume', '=', None),
+                    ],
+                [('ethanol_by_volume', '=', None)])],
+        states={
+            'invisible': ~Eval('contain_ethanol'),
+            },
+        help="How much ethanol/alcohol is contained "
+        "in a given volume at 20°C.\n"
+        "Leave empty to use the template value.")
+    ethanol_by_volume_used = fields.Function(fields.Float(
+            "Alcohol By Volume", digits=(1, 4),
+            states={
+                'invisible': ~Eval('contain_ethanol'),
+                },
+            help="How much ethanol/alcohol is contained "
+            "in a given volume at 20°C."),
+        'get_ethanol_by_volume_used',
+        searcher='search_ethanol_by_volume_used')
+
+    ethanol_volume = fields.Function(
+        fields.Float(
+            "Alcohol Volume", digits='ethanol_volume_unit',
+            help="The volume of ethanol/alcohol in the location."),
+        'get_ethanol_volume')
+
+    def get_ethanol_by_volume_used(self, name):
+        if self.contain_ethanol:
+            if self.ethanol_by_volume is not None:
+                return self.ethanol_by_volume
+            else:
+                return self.template.ethanol_by_volume
+
+    @classmethod
+    def search_ethanol_by_volume_used(cls, name, clause):
+        operator = clause[1]
+        if operator.startswith('!') or operator.startswith('not '):
+            bool_op = 'AND'
+        else:
+            bool_op = 'OR'
+        return [bool_op, [
+                ('ethanol_by_volume', '!=', None),
+                ('ethanol_by_volume', *clause[1:]),
+                ], [
+                ('ethanol_by_volume', '=', None),
+                ('template.ethanol_by_volume', *clause[1:]),
+                ]]
+
+    @classmethod
+    def order_ethanol_by_volume_used(cls, tables):
+        pool = Pool()
+        Template = pool.get('product.template')
+        product, _ = tables[None]
+        if 'template' not in tables:
+            template = Template.__table__()
+            tables['template'] = {
+                None: (template, product.template == template.id),
+                }
+        else:
+            template, _ = tables['template'][None]
+        return [
+            Coalesce(product.ethanol_by_volume, template.ethanol_by_volume)]
+
+    def get_ethanol_volume(self, name):
+        pool = Pool()
+        UoM = pool.get('product.uom')
+
+        if unit := self.ethanol_volume_unit:
+            ethanol_by_volume = self.ethanol_by_volume_used
+            if ethanol_by_volume is not None and self.quantity is not None:
+                if self.default_uom.category == unit.category:
+                    quantity = self.quantity * ethanol_by_volume
+                    return UoM.compute_qty(self.default_uom, quantity, unit)
+                elif getattr(self, 'volume', None) is not None:
+                    quantity = (
+                        self.quantity * self.volume * ethanol_by_volume)
+                    return UoM.compute_qty(self.volume_uom, quantity, unit)
+
+    def compute_ethanol_volume(self, quantity, unit, unit_volume, round=True):
+        pool = Pool()
+        UoM = pool.get('product.uom')
+        assert unit.category == self.default_uom.category
+        if (ethanol_by_volume := self.ethanol_by_volume_used) is not None:
+            if unit.category == unit_volume.category:
+                volume = quantity * ethanol_by_volume
+            else:
+                if getattr(self, 'volume', None) is not None:
+                    volume = quantity * self.volume * ethanol_by_volume
+                    unit = self.volume_uom
+            return UoM.compute_qty(unit, volume, unit_volume, round=round)
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/product.xml
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/product.xml Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,24 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<tryton>
+    <data>
+        <record model="ir.ui.view" id="product_template_view_list">
+            <field name="model">product.template</field>
+            <field name="inherit" ref="product.template_view_tree"/>
+            <field name="name">product_template_list</field>
+        </record>
+
+        <record model="ir.ui.view" id="product_template_view_form">
+            <field name="model">product.template</field>
+            <field name="inherit" ref="product.template_view_form"/>
+            <field name="name">product_template_form</field>
+        </record>
+
+        <record model="ir.ui.view" id="product_product_view_list">
+            <field name="model">product.product</field>
+            <field name="inherit" ref="product.product_view_tree"/>
+            <field name="name">product_product_list</field>
+        </record>
+    </data>
+</tryton>
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/pyproject.toml
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/pyproject.toml      Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,59 @@
+[build-system]
+requires = ['hatchling >= 1', 'hatch-tryton']
+build-backend = 'hatchling.build'
+
+[project]
+name = 'trytond_stock_ethanol'
+dynamic = ['version', 'dependencies', 'optional-dependencies', 'authors', 
'readme']
+requires-python = '>=3.10'
+maintainers = [
+    {name = "Tryton", email = "[email protected]"},
+    ]
+description = "Ethanol for Tryton"
+license = 'GPL-3.0-or-later'
+license-files = ['LICENSE', 'icons/LICENSE', 'COPYRIGHT']
+keywords = ["tryton", "stock", "ethanol", "alcohol"]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Environment :: Plugins",
+    "Framework :: Tryton",
+    "Topic :: Office/Business",
+    "Topic :: Software Development :: Libraries :: Python Modules",
+    ]
+
+[project.entry-points.'trytond.modules']
+stock_ethanol = 'trytond.modules.stock_ethanol'
+
+[project.urls]
+homepage = "https://www.tryton.org/";
+documentation = "https://docs.tryton.org/modules-stock-ethanol/";
+changelog = "https://docs.tryton.org/modules-stock-ethanol/releases.html";
+forum = "https://www.tryton.org/forum";
+issues = "https://bugs.tryton.org/tryton";
+repository = "https://code.tryton.org/tryton";
+funding = "https://www.tryton.org/donate";
+
+[tool.hatch.build]
+include = [
+    '**/tryton.cfg',
+    '**/*.py',
+    '**/*.xml',
+    'view/**/*.xml',
+    'locale/**/*.po',
+    '**/*.fodt',
+    'icons/**/*.svg',
+    'tests/**/*.rst',
+    'tests/**/*.json',
+    ]
+exclude = ['doc']
+
+[tool.hatch.build.targets.wheel.sources]
+"" = "trytond/modules/stock_ethanol"
+
+[tool.hatch.metadata.hooks.tryton]
+dependencies = ['python-sql']
+copyright = 'COPYRIGHT'
+readme = 'README.rst'
+
+[tool.hatch.metadata.hooks.tryton.tryton-optional-dependencies]
+test = ['proteus']
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/stock.py
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/stock.py    Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,221 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+
+from itertools import groupby
+
+from sql import Null
+from sql.conditionals import Coalesce
+
+from trytond.model import Check, ModelSQL, fields
+from trytond.modules.company.model import CompanyValueMixin
+from trytond.pool import Pool, PoolMeta
+from trytond.pyson import Eval, Id
+
+
+class Configuration(metaclass=PoolMeta):
+    __name__ = 'stock.configuration'
+
+    ethanol_volume_uom = fields.MultiValue(
+        fields.Many2One(
+            'product.uom', "Alcohol Volume UoM", required=True,
+            domain=[('category', '=', Id('product', 'uom_cat_volume'))]))
+
+    @classmethod
+    def multivalue_model(cls, field):
+        pool = Pool()
+        if field == 'ethanol_volume_uom':
+            return pool.get('stock.configuration.ethanol')
+        return super().multivalue_model(field)
+
+    @classmethod
+    def default_ethanol_volume_uom(cls, **pattern):
+        model = cls.multivalue_model('ethanol_volume_uom')
+        return model.default_ethanol_volume_uom()
+
+
+class ConfigurationEthanol(ModelSQL, CompanyValueMixin):
+    "Stock Configuration Ethanol"
+    __name__ = 'stock.configuration.ethanol'
+
+    ethanol_volume_uom = fields.Many2One(
+        'product.uom', "Ethanol Volume UoM", required=True,
+        domain=[('category', '=', Id('product', 'uom_cat_volume'))])
+
+    @classmethod
+    def default_ethanol_volume_uom(cls):
+        pool = Pool()
+        UoM = pool.get('product.uom')
+        ModelData = pool.get('ir.model.data')
+        return UoM(ModelData.get_id('product', 'uom_liter')).id
+
+
+class Move(metaclass=PoolMeta):
+    __name__ = 'stock.move'
+
+    contain_ethanol = fields.Function(
+        fields.Boolean("Contain Alcohol"),
+        'on_change_with_contain_ethanol', searcher='search_contain_ethanol')
+    ethanol_by_volume = fields.Function(fields.Float(
+            "Alcohol By Volume", digits=(1, 4),
+            states={
+                'invisible': ~Eval('contain_ethanol'),
+                },
+            help="How much ethanol/alcohol is contained "
+            "in a given volume at 20°C."),
+        'on_change_with_ethanol_by_volume')
+    internal_ethanol_volume = fields.Float(
+        "Internal Alcohol Volume", readonly=True,
+        states={
+            'invisible': ~Eval('ethanol_volume_required', False),
+            'required': Eval('ethanol_volume_required', False),
+            },
+        help="The volume of ethanol/alcohol moved in liter.")
+    ethanol_volume = fields.Function(
+        fields.Float(
+            "Alcohol Volume", digits='ethanol_volume_unit',
+            states={
+                'invisible': ~Eval('ethanol_volume_required'),
+                },
+            help="The volume of ethanol/alcohol moved."),
+        'get_ethanol_volume')
+    ethanol_volume_unit = fields.Function(
+        fields.Many2One(
+            'product.uom', "Alcohol Volume UoM",
+            states={
+                'invisible': ~Eval('ethanol_volume_required'),
+                }),
+        'get_ethanol_volume_unit')
+    ethanol_volume_required = fields.Function(
+        fields.Boolean("Alcohol Volume Required"),
+        'on_change_with_ethanol_volume_required',
+        searcher='search_ethanol_volume_required')
+
+    @classmethod
+    def __setup__(cls):
+        super().__setup__()
+        t = cls.__table__()
+        cls._sql_constraints += [
+            ('check_move_internal_ethanol_volume_pos',
+                Check(t,
+                    (t.internal_ethanol_volume == Null)
+                    | (t.internal_ethanol_volume >= 0)),
+                'stock.msg_move_internal_ethanol_volume_positive'),
+            ]
+
+    @fields.depends('product')
+    def on_change_with_contain_ethanol(self, name=None):
+        if self.product:
+            return self.product.contain_ethanol
+
+    @classmethod
+    def search_contain_ethanol(cls, name, clause):
+        return [('product.' + clause[0], *clause[1:])]
+
+    @fields.depends('product')
+    def on_change_with_ethanol_by_volume(self, name=None):
+        if self.product:
+            return self.product.ethanol_by_volume_used
+
+    @classmethod
+    def order_ethanol_by_volume(cls, tables):
+        pool = Pool()
+        Product = pool.get('product.product')
+        Template = pool.get('product.template')
+        table, _ = tables[None]
+        if 'product' not in tables:
+            product = Product.__table__()
+            product_tables = tables['product'] = {
+                None: (product, table.product == product.id),
+                }
+        else:
+            product_tables = tables['product']
+        if 'template' not in product_tables:
+            template = Template.__table__()
+            product_tables['template'] = {
+                None: (template, product.template == template.id),
+                }
+        else:
+            template, _ = product_tables['template']
+        return [
+            Coalesce(product.ethanol_by_volume, template.ethanol_by_volume)]
+
+    @classmethod
+    def get_ethanol_volume(cls, moves, name):
+        pool = Pool()
+        UoM = pool.get('product.uom')
+        ModelData = pool.get('ir.model.data')
+
+        liter = UoM(ModelData.get_id('product', 'uom_liter'))
+        volumes = {}
+        for move in moves:
+            if move.internal_ethanol_volume is not None:
+                volume = UoM.compute_qty(
+                    liter, move.internal_ethanol_volume,
+                    move.ethanol_volume_unit)
+            else:
+                volume = None
+            volumes[move.id] = volume
+        return volumes
+
+    @classmethod
+    def get_ethanol_volume_unit(cls, moves, name):
+        pool = Pool()
+        Configuration = pool.get('stock.configuration')
+        configuration = Configuration(1)
+        units = {}
+        for company, moves in groupby(moves, key=lambda m: m.company):
+            uom = configuration.get_multivalue(
+                'ethanol_volume_uom', company=company.id)
+            for move in moves:
+                units[move.id] = uom.id
+        return units
+
+    @fields.depends('product')
+    def on_change_with_ethanol_volume_required(self, name=None):
+        if self.product:
+            return self.product.contain_ethanol
+
+    @classmethod
+    def search_ethanol_volume_required(cls, name, clause):
+        return [('product.contain_ethanol', *clause[1:])]
+
+    @classmethod
+    def default_internal_ethanol_volume(cls):
+        # default value before compute of the field
+        return 0
+
+    @fields.depends('product', methods=['on_change_with_internal_quantity'])
+    def on_change_with_internal_ethanol_volume(self):
+        pool = Pool()
+        UoM = pool.get('product.uom')
+        ModelData = pool.get('ir.model.data')
+
+        liter = UoM(ModelData.get_id('product', 'uom_liter'))
+        quantity = self.on_change_with_internal_quantity()
+        if quantity is not None and self.product:
+            return self.product.compute_ethanol_volume(
+                quantity, self.product.default_uom, liter, round=False)
+
+    def compute_fields(self, field_names=None):
+        cls = self.__class__
+        values = super().compute_fields(field_names=field_names)
+        if (field_names is None
+                or (cls.internal_ethanol_volume.on_change_with & field_names)):
+            internal_ethanol_volume = (
+                self.on_change_with_internal_ethanol_volume())
+            if (getattr(self, 'internal_ethanol_volume', None)
+                    != internal_ethanol_volume):
+                values['internal_ethanol_volume'] = internal_ethanol_volume
+        return values
+
+
+class ProductsByLocations(metaclass=PoolMeta):
+    __name__ = 'stock.products_by_locations'
+
+    ethanol_volume = fields.Function(
+        fields.Float(
+            "Alcohol Volume", digits='ethanol_volume_unit'),
+        'get_product', searcher='search_product')
+    ethanol_volume_unit = fields.Function(
+        fields.Many2One('product.uom', "Alcohol Volume UoM"),
+        'get_product')
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/stock.xml
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/stock.xml   Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,42 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<tryton>
+    <data>
+        <record model="ir.ui.view" id="stock_configuration_view_form">
+            <field name="model">stock.configuration</field>
+            <field name="inherit" ref="stock.stock_configuration_view_form"/>
+            <field name="name">stock_configuration_form</field>
+        </record>
+
+        <record model="ir.ui.view" id="stock_move_view_form">
+            <field name="model">stock.move</field>
+            <field name="inherit" ref="stock.move_view_form"/>
+            <field name="name">stock_move_form</field>
+        </record>
+
+        <record model="ir.ui.view" id="stock_move_view_list">
+            <field name="model">stock.move</field>
+            <field name="inherit" ref="stock.move_view_tree"/>
+            <field name="name">stock_move_list</field>
+        </record>
+
+        <record model="ir.ui.view" id="stock_move_view_list_shipment_in">
+            <field name="model">stock.move</field>
+            <field name="inherit" ref="stock.move_view_list_shipment_in"/>
+            <field name="name">stock_move_list</field>
+        </record>
+
+        <record model="ir.ui.view" id="stock_move_view_list_shipment">
+            <field name="model">stock.move</field>
+            <field name="inherit" ref="stock.move_view_list_shipment"/>
+            <field name="name">stock_move_list</field>
+        </record>
+
+        <record model="ir.ui.view" id="stock_products_by_locations_view_list">
+            <field name="model">stock.products_by_locations</field>
+            <field name="inherit" ref="stock.products_by_locations_view_list"/>
+            <field name="name">stock_products_by_locations_list</field>
+        </record>
+    </data>
+</tryton>
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/tests/__init__.py
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/tests/__init__.py   Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,2 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
diff -r d74a1f4d766f -r 10536a0481df 
modules/stock_ethanol/tests/scenario_stock_ethanol.rst
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/tests/scenario_stock_ethanol.rst    Sat Mar 28 
13:40:06 2026 +0100
@@ -0,0 +1,118 @@
+======================
+Stock Ethanol Scenario
+======================
+
+Imports::
+
+    >>> from decimal import Decimal
+    >>> from unittest.mock import patch
+
+    >>> from proteus import Model
+    >>> from trytond.modules.company.tests.tools import create_company, 
get_company
+    >>> from trytond.modules.stock.move import Move
+    >>> from trytond.tests.tools import activate_modules
+
+Patch on_change_with_assignation_required::
+
+    >>> _ = patch.object(
+    ...     Move, 'on_change_with_assignation_required',
+    ...     return_value=False).start()
+
+Activate modules::
+
+    >>> config = activate_modules(
+    ...     ['stock_ethanol', 'product_measurements'])
+
+    >>> Location = Model.get('stock.location')
+    >>> Move = Model.get('stock.move')
+    >>> ProductTemplate = Model.get('product.template')
+    >>> Uom = Model.get('product.uom')
+
+Create company::
+
+    >>> _ = create_company()
+    >>> company = get_company()
+
+Get stock locations::
+
+    >>> warehouse_loc, = Location.find([('type', '=', 'warehouse')])
+    >>> supplier_loc, = Location.find([('code', '=', 'SUP')])
+    >>> storage_loc, = Location.find([('code', '=', 'STO')])
+    >>> customer_loc, = Location.find([('code', '=', 'CUS')])
+    >>> lost_found_loc, = Location.find([('type', '=', 'lost_found')])
+
+Create products::
+
+    >>> liter, = Uom.find([('name', '=', "Liter")])
+    >>> unit, = Uom.find([('name', '=', "Unit")])
+    >>> cubic_meter, = Uom.find([('name', '=', "Cubic meter")])
+
+    >>> template = ProductTemplate()
+    >>> template.name = "Alcohol"
+    >>> template.default_uom = liter
+    >>> template.type = 'goods'
+    >>> template.contain_ethanol = True
+    >>> template.ethanol_by_volume = 0.5
+    >>> template.save()
+    >>> alcohol, = template.products
+
+    >>> template = ProductTemplate()
+    >>> template.name = "Cork"
+    >>> template.default_uom = unit
+    >>> template.type = 'goods'
+    >>> template.contain_ethanol = False
+    >>> template.save()
+    >>> cork, = template.products
+
+    >>> template = ProductTemplate()
+    >>> template.name = "Bottle"
+    >>> template.default_uom = unit
+    >>> template.type = 'goods'
+    >>> template.volume = 0.5
+    >>> template.volume_uom = liter
+    >>> template.contain_ethanol = True
+    >>> template.ethanol_by_volume = 0.1
+    >>> template.save()
+    >>> bottle, = template.products
+
+Receive alcohol with volume::
+
+    >>> move = Move()
+    >>> move.product = alcohol
+    >>> move.quantity = 10
+    >>> move.from_location = lost_found_loc
+    >>> move.to_location = storage_loc
+    >>> move.save()
+    >>> move.click('do')
+
+    >>> move.ethanol_volume
+    5.0
+
+Receive cork::
+
+    >>> move = Move()
+    >>> move.product = cork
+    >>> move.quantity = 100
+    >>> move.from_location = supplier_loc
+    >>> move.to_location = storage_loc
+    >>> move.unit_price = Decimal('1.00')
+    >>> move.currency = company.currency
+    >>> move.save()
+    >>> move.click('do')
+
+    >>> move.ethanol_volume
+
+Send bottles::
+
+    >>> move = Move()
+    >>> move.product = bottle
+    >>> move.quantity = 10
+    >>> move.from_location = storage_loc
+    >>> move.to_location = customer_loc
+    >>> move.unit_price = Decimal('20.00')
+    >>> move.currency = company.currency
+    >>> move.save()
+    >>> move.click('do')
+
+    >>> move.ethanol_volume
+    0.5
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/tests/test_module.py
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/tests/test_module.py        Sat Mar 28 13:40:06 
2026 +0100
@@ -0,0 +1,12 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+from trytond.tests.test_tryton import ModuleTestCase
+
+
+class StockEthanolTestCase(ModuleTestCase):
+    "Test Stock Ethanol module"
+    module = 'stock_ethanol'
+    extras = ['product_measurements']
+
+
+del ModuleTestCase
diff -r d74a1f4d766f -r 10536a0481df 
modules/stock_ethanol/tests/test_scenario.py
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/tests/test_scenario.py      Sat Mar 28 13:40:06 
2026 +0100
@@ -0,0 +1,8 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+
+from trytond.tests.test_tryton import load_doc_tests
+
+
+def load_tests(*args, **kwargs):
+    return load_doc_tests(__name__, __file__, *args, **kwargs)
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/tox.ini
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/tox.ini     Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,24 @@
+[tox]
+envlist = {py310,py311,py312,py313,py314}-{sqlite,postgresql}
+
+[testenv]
+changedir = {env_site_packages_dir}
+extras = test
+commands =
+    coverage run --rcfile={toxinidir}/tox.ini 
--source=trytond.modules.stock_ethanol --omit=*/tests/* -m xmlrunner discover 
-s trytond.modules.stock_ethanol {posargs}
+commands_post =
+    coverage report --rcfile={toxinidir}/tox.ini
+    coverage xml --rcfile={toxinidir}/tox.ini -o {package_root}/coverage.xml
+deps =
+    coverage
+    unittest-xml-reporting
+    postgresql: psycopg[pool] >= 3
+passenv = *
+setenv =
+    sqlite: TRYTOND_DATABASE_URI={env:SQLITE_URI:sqlite://}
+    postgresql: TRYTOND_DATABASE_URI={env:POSTGRESQL_URI:postgresql://}
+    sqlite: DB_NAME={env:DB_NAME::memory:}
+    postgresql: DB_NAME={env:DB_NAME:test}
+
+[coverage:run]
+relative_files = true
diff -r d74a1f4d766f -r 10536a0481df modules/stock_ethanol/tryton.cfg
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/tryton.cfg  Sat Mar 28 13:40:06 2026 +0100
@@ -0,0 +1,22 @@
+[tryton]
+version=7.9.0
+depends:
+    company
+    ir
+    product
+    stock
+extras_depend:
+    product_measurements
+xml:
+    product.xml
+    stock.xml
+    message.xml
+
+[register]
+model:
+    product.Template
+    product.Product
+    stock.Configuration
+    stock.ConfigurationEthanol
+    stock.Move
+    stock.ProductsByLocations
diff -r d74a1f4d766f -r 10536a0481df 
modules/stock_ethanol/view/product_product_list.xml
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/view/product_product_list.xml       Sat Mar 28 
13:40:06 2026 +0100
@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<data>
+    <xpath expr="//field[@name='ethanol_by_volume']" position="replace">
+        <field name="ethanol_by_volume_used" factor="100" optional="1">
+            <suffix name="ethanol_by_volume_used" string="%"/>
+        </field>
+    </xpath>
+</data>
diff -r d74a1f4d766f -r 10536a0481df 
modules/stock_ethanol/view/product_template_form.xml
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/view/product_template_form.xml      Sat Mar 28 
13:40:06 2026 +0100
@@ -0,0 +1,18 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<data>
+    <xpath expr="//group[@id='checkboxes']" position="inside">
+        <label name="contain_ethanol"/>
+        <field name="contain_ethanol" xexpand="0" width="25"/>
+    </xpath>
+    <xpath expr="//notebook" position="inside">
+        <page string="Ethanol" id="ethanol">
+            <label name="ethanol_by_volume"/>
+            <group col="-1" id="ethanol_by_volume">
+                <field name="ethanol_by_volume" factor="100" xexpand="0"/>
+                <label name="ethanol_by_volume" string="%" xalign="0" 
xexpand="1"/>
+            </group>
+        </page>
+    </xpath>
+</data>
diff -r d74a1f4d766f -r 10536a0481df 
modules/stock_ethanol/view/product_template_list.xml
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/view/product_template_list.xml      Sat Mar 28 
13:40:06 2026 +0100
@@ -0,0 +1,11 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<data>
+    <xpath expr="//field[@name='type']" position="after">
+        <field name="contain_ethanol" optional="1"/>
+        <field name="ethanol_by_volume" factor="100" optional="1">
+            <suffix name="ethanol_by_volume" string="%"/>
+        </field>
+    </xpath>
+</data>
diff -r d74a1f4d766f -r 10536a0481df 
modules/stock_ethanol/view/stock_configuration_form.xml
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/view/stock_configuration_form.xml   Sat Mar 28 
13:40:06 2026 +0100
@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<data>
+    <xpath expr="//form" position="inside">
+        <separator id="ethanol" colspan="4" string="Ethanol"/>
+        <label name="ethanol_volume_uom"/>
+        <field name="ethanol_volume_uom"/>
+    </xpath>
+</data>
diff -r d74a1f4d766f -r 10536a0481df 
modules/stock_ethanol/view/stock_move_form.xml
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/view/stock_move_form.xml    Sat Mar 28 13:40:06 
2026 +0100
@@ -0,0 +1,14 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<data>
+    <xpath expr="//field[@name='currency']" position="after">
+        <label name="ethanol_volume"/>
+        <field name="ethanol_volume" symbol="ethanol_volume_unit"/>
+        <label name="ethanol_by_volume"/>
+        <group col="-1" id="ethanol_by_volume">
+            <field name="ethanol_by_volume" factor="100" xexpand="0"/>
+            <label name="ethanol_by_volume" string="%" xalign="0" xexpand="1"/>
+        </group>
+    </xpath>
+</data>
diff -r d74a1f4d766f -r 10536a0481df 
modules/stock_ethanol/view/stock_move_list.xml
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/view/stock_move_list.xml    Sat Mar 28 13:40:06 
2026 +0100
@@ -0,0 +1,13 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<data>
+    <xpath expr="//field[@name='product']" position="after">
+        <field name="ethanol_by_volume" factor="100" optional="1">
+            <suffix name="ethanol_by_volume" string="%"/>
+        </field>
+    </xpath>
+    <xpath expr="//field[@name='quantity']" position="after">
+        <field name="ethanol_volume" symbol="ethanol_volume_unit" 
optional="1"/>
+    </xpath>
+</data>
diff -r d74a1f4d766f -r 10536a0481df 
modules/stock_ethanol/view/stock_products_by_locations_list.xml
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stock_ethanol/view/stock_products_by_locations_list.xml   Sat Mar 
28 13:40:06 2026 +0100
@@ -0,0 +1,8 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<data>
+    <xpath expr="//field[@name='forecast_quantity']" position="after">
+        <field name="ethanol_volume" symbol="ethanol_volume_unit" optional="1" 
sum="1"/>
+    </xpath>
+</data>


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