Add module product_category_tax

product_category_tax/README.rst

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+Product Category Tax
+====================
+
+This module will allow you to configure sale and purchase taxes on product categories. When you set the product category of a product, the taxes configured on the product category will be copied to the product. It also adds a constraint on products that checks that the taxes configured on the product are the same as the taxes configured on it's related product category.
+
+Configuration
+=============
+
+Set the taxes on the product categories via the menu *Sales > Configuration > Product Categories > Product Categories*.
+
+Credits
+=======
+
+Contributors
+------------
+
+* Alexis de Lattre <alexis.delattre@akretion.com>
+
+Maintainer
+----------
+
+.. image:: http://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: http://odoo-community.org
+
+This module is maintained by the OCA.
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose mission is to support the collaborative development of Odoo features and promote its widespread use.
+
+To contribute to this module, please visit http://odoo-community.org.

product_category_tax/__init__.py

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+# -*- encoding: utf-8 -*-
+##############################################################################
+#
+#    Product Category Tax module for Odoo
+#    Copyright (C) 2015 Akretion (http://www.akretion.com)
+#    @author Alexis de Lattre <alexis.delattre@akretion.com>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero 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 Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+
+from . import product

product_category_tax/__openerp__.py

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+# -*- encoding: utf-8 -*-
+##############################################################################
+#
+#    Product Category Tax module for Odoo
+#    Copyright (C) 2015 Akretion (http://www.akretion.com)
+#    @author Alexis de Lattre <alexis.delattre@akretion.com>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero 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 Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+
+
+{
+    'name': 'Product Category Tax',
+    'version': '0.1',
+    'category': 'Accounting & Finance',
+    'license': 'AGPL-3',
+    'summary': 'Adds sale and purchase taxes on product category',
+    'description': "",
+    'author': 'Akretion',
+    'website': 'http://www.akretion.com',
+    'depends': ['account'],
+    'data': ['product_view.xml'],
+    'demo': [],
+    'installable': True,
+}

product_category_tax/product.py

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+# -*- encoding: utf-8 -*-
+##############################################################################
+#
+#    Product Category Tax module for Odoo
+#    Copyright (C) 2015 Akretion (http://www.akretion.com)
+#    @author Alexis de Lattre <alexis.delattre@akretion.com>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero 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 Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+
+from openerp import models, fields, api, _
+from openerp.exceptions import ValidationError
+
+
+class ProductTemplate(models.Model):
+    _inherit = 'product.template'
+
+    @api.onchange('categ_id')
+    def onchange_categ_id(self):
+        if self.categ_id:
+            self.taxes_id = self.categ_id.sale_tax_ids.ids
+            self.supplier_taxes_id = self.categ_id.purchase_tax_ids.ids
+
+    @api.one
+    @api.constrains('taxes_id', 'supplier_taxes_id')
+    def _check_tax_categ(self):
+        if self.categ_id:
+            if self.categ_id.sale_tax_ids.ids != self.taxes_id.ids:
+                raise ValidationError(
+                    _("The sale taxes configured on the product '%s' "
+                        "are not the same as the sale taxes configured "
+                        "on it's related product category '%s'.")
+                    % (self.name, self.categ_id.complete_name))
+            if (
+                    self.categ_id.purchase_tax_ids.ids !=
+                    self.supplier_taxes_id.ids):
+                raise ValidationError(
+                    _("The purchase taxes configured on the product '%s' "
+                        "are not the same as the purchase taxes configured "
+                        "on it's related product category '%s'.")
+                    % (self.name, self.categ_id.complete_name))
+
+
+class ProductProduct(models.Model):
+    _inherit = 'product.product'
+
+    @api.onchange('categ_id')
+    def onchange_categ_id(self):
+        if self.categ_id:
+            self.taxes_id = self.categ_id.sale_tax_ids.ids
+            self.supplier_taxes_id = self.categ_id.purchase_tax_ids.ids
+
+
+class ProductCategory(models.Model):
+    _inherit = 'product.category'
+
+    sale_tax_ids = fields.Many2many(
+        'account.tax', 'product_categ_sale_tax_rel', 'categ_id', 'tax_id',
+        string="Sale Taxes",
+        domain=[
+            ('parent_id', '=', False),
+            ('type_tax_use', 'in', ['sale', 'all'])])
+    purchase_tax_ids = fields.Many2many(
+        'account.tax', 'product_categ_purchase_tax_rel', 'categ_id', 'tax_id',
+        string="Purchase Taxes",
+        domain=[
+            ('parent_id', '=', False),
+            ('type_tax_use', 'in', ['purchase', 'all'])])

product_category_tax/product_view.xml

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+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+    Copyright (C) 2015 Akretion (http://www.akretion.com/)
+    @author Alexis de Lattre <alexis.delattre@akretion.com>
+    The licence is in the file __openerp__.py
+-->
+
+<openerp>
+<data>
+
+<record id="view_category_property_form" model="ir.ui.view">
+    <field name="name">product_category_tax.product.categ.form</field>
+    <field name="model">product.category</field>
+    <field name="inherit_id" ref="account.view_category_property_form" />
+    <field name="arch" type="xml">
+        <group name="account_property" position="inside">
+            <field name="sale_tax_ids" widget="many2many_tags"/>
+            <field name="purchase_tax_ids" widget="many2many_tags"/>
+        </group>
+    </field>
+</record>
+
+</data>
+</openerp>