Update for public release

README.md

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+<div align="center">
+    <a href="https://www.odoo.com/documentation/12.0/index.html">
+        <img alt="odoo version" src="https://img.shields.io/badge/odoo-version%2012-875A7B.svg?style=flat"></img>
+    </a>
+    <a href="http://www.alliantum.com">
+        <img alt="company" src="https://img.shields.io/badge/company-Alliantum-blue.svg?style=flat"></img>
+    </a>
+    <a href="http://www.gnu.org/licenses/agpl-3.0-standalone.html">
+        <img alt="license" src="https://img.shields.io/badge/license-AGPL--3-blue.svg?style=flat"></img>
+    </a>
+    <a href="https://github.com/Alliantum/odoo_no_fractions/releases/latest">
+        <img alt="module version" src="https://img.shields.io/github/v/tag/Alliantum/odoo_no_fractions?color=blue&label=version&style=flat">
+    </a>
+</div>
+
+<div align="center">
+    <a href="http://www.alliantum.com">
+        <img src="./static/description/icon.png" width="10%">
+    </a>
+    <div>
+        <h1>Avoid UoM Fractions</h1>
+        Avoid selling non-integer quantities of a Unit of Measure category.
+        <hr>
+    </div>
+    <div>
+        <img src="./static/description/demo.gif" width="90%" style="border-radius: 5px">
+    </div>
+</div>
+
+## Usage
+
+Install this add-on and it will be automatically ready to use.
+
+Allow only integer amounts when purchasing products that have this option enabled on its
+Unit of Measure's category.
+
+## Contributors
+
+- [Alliantum](http://www.alliantum.com)

__init__.py

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+# -*- coding: utf-8 -*-
+
+from . import models

__manifest__.py

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+# -*- coding: utf-8 -*-
+{
+    'name': "Avoid UoM Fractions",
+    'summary': """Avoid selling non-integer quantities of a Unit of Measure category""",
+    'description': """
+    """,
+    'author': "Alliantum",
+    'website': "https://www.alliantum.com",
+    'version': '12.0.1.0.0',
+    'license': 'AGPL-3',
+    'category': 'Warehouse',
+    'depends': ['uom', 'sale', 'account'],
+    'data': [
+        'views/product_uom_categ.xml',
+    ],
+}

i18n/de.po

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+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+#	* odoo_no_fractions
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 12.0\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2020-12-23 15:54+0000\n"
+"PO-Revision-Date: 2020-12-23 15:54+0000\n"
+"Last-Translator: <>\n"
+"Language-Team: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: \n"
+"Plural-Forms: \n"
+
+#. module: odoo_no_fractions
+#: model:ir.model.fields,field_description:odoo_no_fractions.field_uom_category__avoid_sell_fractions
+msgid "Avoid Sell Fractions"
+msgstr "Vermeiden Sie den Verkauf von Fraktionen"
+
+#. module: odoo_no_fractions
+#: code:addons/odoo_no_fractions/models/account_line.py:19
+#: code:addons/odoo_no_fractions/models/sale_order_line.py:18
+#, python-format
+msgid "Invalid Product Quantity"
+msgstr "Ungültige Produktmenge"
+
+#. module: odoo_no_fractions
+#: model:ir.model,name:odoo_no_fractions.model_account_invoice_line
+msgid "Invoice Line"
+msgstr "Rechungsposition"
+
+#. module: odoo_no_fractions
+#: model:ir.model,name:odoo_no_fractions.model_uom_category
+msgid "Product UoM Categories"
+msgstr "Kategorien für Maßeinheiten von Produkten"
+
+#. module: odoo_no_fractions
+#: model:ir.model,name:odoo_no_fractions.model_sale_order_line
+msgid "Sales Order Line"
+msgstr "Auftragsposition"
+
+#. module: odoo_no_fractions
+#: code:addons/odoo_no_fractions/models/sale_order_line.py:19
+#: code:addons/odoo_no_fractions/models/sale_order_line.py:36
+#: code:addons/odoo_no_fractions/models/sale_order_line.py:62
+#: code:addons/odoo_no_fractions/models/sale_order_line.py:72
+#, python-format
+msgid "Your're trying to sell {} {} of the product {}.\n"
+" However the UoM for that product ( {} ) doesn't allow to sell floating point amounts of it. Please enter a non-decimal Ordered Qty."
+msgstr "Sie versuchen zu verkaufen {} {} des Produkts {}.\n Die UoM für dieses Produkt ( {} ) erlaubt es jedoch nicht, Fließkommabeträge davon zu verkaufen. Bitte geben Sie eine nicht-dezimale Bestellmenge ein."
+
+#. module: odoo_no_fractions
+#: code:addons/odoo_no_fractions/models/account_line.py:63
+#: code:addons/odoo_no_fractions/models/account_line.py:73
+#, python-format
+msgid "Your're trying to sell {} {} of the product {}.\n"
+" However the UoM for that product ( {} ) doesn't allow to sell floating point amounts of it. Please enter a non-decimal Ordered Quantity."
+msgstr "Sie versuchen zu verkaufen {} {} des Produkts {}.\n Die UoM für dieses Produkt ( {} ) erlaubt es jedoch nicht, Fließkommabeträge davon zu verkaufen. Bitte geben Sie eine nicht-dezimale Bestellmenge ein."
+
+#. module: odoo_no_fractions
+#: code:addons/odoo_no_fractions/models/account_line.py:20
+#: code:addons/odoo_no_fractions/models/account_line.py:37
+#, python-format
+msgid "Your're trying to sell {} {} of the product {}.\n"
+" However the UoM for that product ( {} ) doesn't allow to sell floating point amounts of it. Please enter a non-decimal Quantity."
+msgstr "Sie versuchen zu verkaufen {} {} des Produkts {}.\n Die UoM für dieses Produkt ( {} ) erlaubt es jedoch nicht, Fließkommabeträge davon zu verkaufen. Bitte geben Sie eine nicht-dezimale Bestellmenge ein."
+
+#. module: odoo_no_fractions
+#: code:addons/odoo_no_fractions/models/sale_order_line.py:54
+#, python-format
+msgid "Your're trying to sell {} {}.\n"
+" However the UoM for that product ( {} ) doesn't allow to sell floating point amounts of it. Please enter a non-decimal Ordered Qty."
+msgstr "Sie versuchen zu verkaufen {} {} des Produkts {}.\n Die UoM für dieses Produkt ( {} ) erlaubt es jedoch nicht, Fließkommabeträge davon zu verkaufen. Bitte geben Sie eine nicht-dezimale Bestellmenge ein."
+
+#. module: odoo_no_fractions
+#: code:addons/odoo_no_fractions/models/account_line.py:55
+#, python-format
+msgid "Your're trying to sell {} {}.\n"
+" However the UoM for that product ( {} ) doesn't allow to sell floating point amounts of it. Please enter a non-decimal Ordered Quantity."
+msgstr "Sie versuchen zu verkaufen {} {} des Produkts {}.\n Die UoM für dieses Produkt ( {} ) erlaubt es jedoch nicht, Fließkommabeträge davon zu verkaufen. Bitte geben Sie eine nicht-dezimale Bestellmenge ein."
+

i18n/odoo_no_fractions.pot

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+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+#	* odoo_no_fractions
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 12.0\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2020-12-23 15:54+0000\n"
+"PO-Revision-Date: 2020-12-23 15:54+0000\n"
+"Last-Translator: <>\n"
+"Language-Team: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: \n"
+"Plural-Forms: \n"
+
+#. module: odoo_no_fractions
+#: model:ir.model.fields,field_description:odoo_no_fractions.field_uom_category__avoid_sell_fractions
+msgid "Avoid Sell Fractions"
+msgstr ""
+
+#. module: odoo_no_fractions
+#: code:addons/odoo_no_fractions/models/account_line.py:19
+#: code:addons/odoo_no_fractions/models/sale_order_line.py:18
+#, python-format
+msgid "Invalid Product Quantity"
+msgstr ""
+
+#. module: odoo_no_fractions
+#: model:ir.model,name:odoo_no_fractions.model_account_invoice_line
+msgid "Invoice Line"
+msgstr ""
+
+#. module: odoo_no_fractions
+#: model:ir.model,name:odoo_no_fractions.model_uom_category
+msgid "Product UoM Categories"
+msgstr ""
+
+#. module: odoo_no_fractions
+#: model:ir.model,name:odoo_no_fractions.model_sale_order_line
+msgid "Sales Order Line"
+msgstr ""
+
+#. module: odoo_no_fractions
+#: code:addons/odoo_no_fractions/models/sale_order_line.py:19
+#: code:addons/odoo_no_fractions/models/sale_order_line.py:36
+#: code:addons/odoo_no_fractions/models/sale_order_line.py:62
+#: code:addons/odoo_no_fractions/models/sale_order_line.py:72
+#, python-format
+msgid "Your're trying to sell {} {} of the product {}.\n"
+" However the UoM for that product ( {} ) doesn't allow to sell floating point amounts of it. Please enter a non-decimal Ordered Qty."
+msgstr ""
+
+#. module: odoo_no_fractions
+#: code:addons/odoo_no_fractions/models/account_line.py:63
+#: code:addons/odoo_no_fractions/models/account_line.py:73
+#, python-format
+msgid "Your're trying to sell {} {} of the product {}.\n"
+" However the UoM for that product ( {} ) doesn't allow to sell floating point amounts of it. Please enter a non-decimal Ordered Quantity."
+msgstr ""
+
+#. module: odoo_no_fractions
+#: code:addons/odoo_no_fractions/models/account_line.py:20
+#: code:addons/odoo_no_fractions/models/account_line.py:37
+#, python-format
+msgid "Your're trying to sell {} {} of the product {}.\n"
+" However the UoM for that product ( {} ) doesn't allow to sell floating point amounts of it. Please enter a non-decimal Quantity."
+msgstr ""
+
+#. module: odoo_no_fractions
+#: code:addons/odoo_no_fractions/models/sale_order_line.py:54
+#, python-format
+msgid "Your're trying to sell {} {}.\n"
+" However the UoM for that product ( {} ) doesn't allow to sell floating point amounts of it. Please enter a non-decimal Ordered Qty."
+msgstr ""
+
+#. module: odoo_no_fractions
+#: code:addons/odoo_no_fractions/models/account_line.py:55
+#, python-format
+msgid "Your're trying to sell {} {}.\n"
+" However the UoM for that product ( {} ) doesn't allow to sell floating point amounts of it. Please enter a non-decimal Ordered Quantity."
+msgstr ""
+

models/__init__.py

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+# -*- coding: utf-8 -*-
+
+from . import account_line
+from . import sale_order_line
+from . import uom_uom

models/account_line.py

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+# -*- coding: utf-8 -*-
+
+from odoo import models, api, _
+from odoo.exceptions import ValidationError
+
+
+class AccountInvoiceLine(models.Model):
+    _inherit = 'account.invoice.line'
+
+    @api.multi
+    @api.onchange('product_id', 'uom_id')
+    def _check_avoid_fractions(self):
+        """If the uom category of a product has `avoid_sell_fractions` enabled, and the
+        quantity is not an integer, display a warning"""
+        for line in self:
+            if line.uom_id.category_id.avoid_sell_fractions:
+                if int(line.quantity) != line.quantity:
+                    warning = {
+                        'title': _('Invalid Product Quantity'),
+                        'message': _("Your're trying to sell {} {} of the product {}.\n"
+                                     " However the UoM for that product ( {} ) doesn't allow to"
+                                     " sell floating point amounts of it. Please enter a non-decimal Quantity.").format(line.quantity,
+                                                                                                                        line.uom_id.name,
+                                                                                                                        line.product_id.name,
+                                                                                                                        line.uom_id.name),
+                    }
+                    return {'warning': warning}
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        """If the uom category of a product has `avoid_sell_fractions` enabled, and the
+        quantity is not an integer, return an error that prevents the creation of the invoice"""
+        lines = super(AccountInvoiceLine, self).create(vals_list)
+        for line in lines:
+            if line.uom_id.category_id.avoid_sell_fractions:
+                if int(line.quantity) != line.quantity:
+                    raise ValidationError(_("Your're trying to sell {} {} of the product {}.\n"
+                                            " However the UoM for that product ( {} ) doesn't allow to"
+                                            " sell floating point amounts of it. Please enter a non-decimal Quantity.").format(line.quantity,
+                                                                                                                               line.uom_id.name,
+                                                                                                                               line.product_id.name,
+                                                                                                                               line.uom_id.name))
+        return lines
+
+    @api.multi
+    def write(self, vals):
+        """If the uom category of a product has `avoid_sell_fractions` enabled, and the
+        quantity is not an integer, return an error that prevents saving the invoice when
+        a change was made to the quantity or the uom"""
+        res = super(AccountInvoiceLine, self).write(vals)
+        if vals.get('uom_id'):
+            uom_id = self.env['uom.uom'].browse(vals.get('uom_id'))
+            if uom_id.category_id.avoid_sell_fractions:
+                if vals.get('quantity') and (int(vals.get('quantity')) != vals.get('quantity')):
+                    raise ValidationError(_("Your're trying to sell {} {}.\n"
+                                            " However the UoM for that product ( {} ) doesn't allow to"
+                                            " sell floating point amounts of it. Please enter a non-decimal Ordered Quantity.").format(vals.get('quantity'),
+                                                                                                                                       uom_id.name,
+                                                                                                                                       uom_id.name))
+                else:
+                    for line in self:
+                        if int(line.quantity) != line.quantity:
+                            raise ValidationError(_("Your're trying to sell {} {} of the product {}.\n"
+                                                    " However the UoM for that product ( {} ) doesn't allow to"
+                                                    " sell floating point amounts of it. Please enter a non-decimal Ordered Quantity.").format(line.quantity,
+                                                                                                                                               line.uom_id.name,
+                                                                                                                                               line.product_id.name,
+                                                                                                                                               line.uom_id.name))
+        elif vals.get('quantity'):
+            for line in self:
+                if line.uom_id.category_id.avoid_sell_fractions:
+                    if int(vals.get('quantity')) != vals.get('quantity'):
+                        raise ValidationError(_("Your're trying to sell {} {} of the product {}.\n"
+                                                " However the UoM for that product ( {} ) doesn't allow to"
+                                                " sell floating point amounts of it. Please enter a non-decimal Ordered Quantity.").format(vals.get('quantity'),
+                                                                                                                                           line.uom_id.name,
+                                                                                                                                           line.product_id.name,
+                                                                                                                                           line.uom_id.name))
+        return res