Merge PR #441 into 12.0

Signed-off-by pedrobaeza

contract_price_revision/README.rst

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+=======================
+Contract Price Revision
+=======================
+
+.. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |badge1| image:: https://img.shields.io/badge/licence-AGPL--3-blue.png
+    :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+    :alt: License: AGPL-3
+.. |badge2| image:: https://img.shields.io/badge/github-OCA%2Fcontract-lightgray.png?logo=github
+    :target: https://github.com/OCA/contract/tree/12.0/contract_price_revision
+    :alt: OCA/contract
+.. |badge3| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/contract-12-0/contract-12-0-contract_price_revision
+    :alt: Translate me on Weblate
+.. |badge4| image:: https://img.shields.io/badge/runbot-Try%20me-875A7B.png
+    :target: https://runbot.odoo-community.org/runbot/110/12.0
+    :alt: Try me on Runbot
+
+|badge1| |badge2| |badge3| |badge4| 
+
+This module allows to create revisions of contract line prices.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Usage
+=====
+
+To use this module:
+
+#. Go to **Invoicing > Customers > Customer Contracts** if you are a billing
+   user.
+#. Select as many contracts as you want to update line prices.
+#. Click on Action button and execute the wizard **Create revision of contract
+   lines**.
+#. Enter date start from which the new price will be valid and enter date
+   end and percentage to increase old contract lines.
+#. By clicking on Apply button, a new contract line will be created with
+   a price increased accordingly to the percent entered. Old contract lines
+   will have as ending date the day before the entered date.
+#. When create invoices related to contracts selected, prices will be update
+   with the prices that are not out of date.
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/contract/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us smashing it by providing a detailed and welcomed
+`feedback <https://github.com/OCA/contract/issues/new?body=module:%20contract_price_revision%0Aversion:%2012.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+
+Do not contact contributors directly about support or help with technical issues.
+
+Credits
+=======
+
+Authors
+~~~~~~~
+
+* Tecnativa
+
+Contributors
+~~~~~~~~~~~~
+
+* `Tecnativa <https://www.tecnativa.com>`_:
+
+  * Vicent Cubells
+  * Carlos Dauden
+
+Maintainers
+~~~~~~~~~~~
+
+This module is maintained by the OCA.
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+.. |maintainer-carlosdauden| image:: https://github.com/carlosdauden.png?size=40px
+    :target: https://github.com/carlosdauden
+    :alt: carlosdauden
+
+Current `maintainer <https://odoo-community.org/page/maintainer-role>`__:
+
+|maintainer-carlosdauden| 
+
+This module is part of the `OCA/contract <https://github.com/OCA/contract/tree/12.0/contract_price_revision>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

contract_price_revision/__init__.py

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+from . import models
+from . import wizards

contract_price_revision/__manifest__.py

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+# Copyright 2019 Tecnativa - Vicent Cubells
+# Copyright 2019 Tecnativa - Carlos Dauden
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+
+{
+    'name': 'Contract Price Revision',
+    'summary': 'Easy revision of contract prices',
+    'version': '12.0.1.0.0',
+    'category': 'Contract',
+    'author': 'Tecnativa, '
+              'Odoo Community Association (OCA)',
+    'license': 'AGPL-3',
+    'website': 'https://github.com/OCA/contract',
+    'depends': [
+        'contract',
+    ],
+    'data': [
+        'views/contract_line.xml',
+        'wizards/contract_price_revision_views.xml',
+    ],
+    'installable': True,
+    'development_status': 'Stable',
+    'maintainers': ['carlosdauden'],
+}

contract_price_revision/i18n/contract_price_revision.pot

@@ -0,0 +1,107 @@
+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+#	* contract_price_revision
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 12.0\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2019-12-17 11:19+0000\n"
+"PO-Revision-Date: 2019-12-17 11:19+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: contract_price_revision
+#: model_terms:ir.ui.view,arch_db:contract_price_revision.contract_line_duplicate_wizard_view
+msgid "Apply"
+msgstr ""
+
+#. module: contract_price_revision
+#: model_terms:ir.ui.view,arch_db:contract_price_revision.contract_line_duplicate_wizard_view
+msgid "Cancel"
+msgstr ""
+
+#. module: contract_price_revision
+#: model:ir.model,name:contract_price_revision.model_contract_line
+msgid "Contract Line"
+msgstr ""
+
+#. module: contract_price_revision
+#: model:ir.actions.act_window,name:contract_price_revision.contract_line_duplicate_wizard_action
+msgid "Create revision of contract lines"
+msgstr ""
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__create_uid
+msgid "Created by"
+msgstr ""
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__create_date
+msgid "Created on"
+msgstr ""
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__date_end
+msgid "Date End"
+msgstr ""
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__date_start
+msgid "Date Start"
+msgstr ""
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__display_name
+msgid "Display Name"
+msgstr ""
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__id
+msgid "ID"
+msgstr ""
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard____last_update
+msgid "Last Modified on"
+msgstr ""
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__write_uid
+msgid "Last Updated by"
+msgstr ""
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__write_date
+msgid "Last Updated on"
+msgstr ""
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_line__previous_price
+msgid "Previous price"
+msgstr ""
+
+#. module: contract_price_revision
+#: model_terms:ir.ui.view,arch_db:contract_price_revision.contract_line_duplicate_wizard_view
+msgid "Set new start date and variation percent to duplicate.\n"
+"                    This process set start date previous day as end date of\n"
+"                    origin record.\n"
+"                    <br/>\n"
+"                    <br/>"
+msgstr ""
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_line__variation_percent
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__variation_percent
+msgid "Variation %"
+msgstr ""
+
+#. module: contract_price_revision
+#: model:ir.model,name:contract_price_revision.model_contract_price_revision_wizard
+msgid "Wizard to update price based on percentage variation"
+msgstr ""
+

contract_price_revision/i18n/es.po

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+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+# 	* contract_price_revision
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 11.0\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2019-12-17 12:20+0100\n"
+"PO-Revision-Date: 2019-12-17 12:22+0100\n"
+"Last-Translator: Carlos Dauden <carlos.dauden@tecnativa.com>\n"
+"Language-Team: \n"
+"Language: es\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: \n"
+"X-Generator: Poedit 1.8.7.1\n"
+
+#. module: contract_price_revision
+#: model_terms:ir.ui.view,arch_db:contract_price_revision.contract_line_duplicate_wizard_view
+msgid "Apply"
+msgstr "Aplicar"
+
+#. module: contract_price_revision
+#: model_terms:ir.ui.view,arch_db:contract_price_revision.contract_line_duplicate_wizard_view
+msgid "Cancel"
+msgstr "Cancelar"
+
+#. module: contract_price_revision
+#: model:ir.model,name:contract_price_revision.model_contract_line
+msgid "Contract Line"
+msgstr "Línea de contrato"
+
+#. module: contract_price_revision
+#: model:ir.actions.act_window,name:contract_price_revision.contract_line_duplicate_wizard_action
+msgid "Create revision of contract lines"
+msgstr "Crear revisión de las líneas de contrato"
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__create_uid
+msgid "Created by"
+msgstr "Creado por"
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__create_date
+msgid "Created on"
+msgstr "Creado el"
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__date_end
+msgid "Date End"
+msgstr "Fecha fin"
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__date_start
+msgid "Date Start"
+msgstr "Fecha inicio"
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__display_name
+msgid "Display Name"
+msgstr "Nombre mostrado"
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__id
+msgid "ID"
+msgstr "Id"
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard____last_update
+msgid "Last Modified on"
+msgstr "Última modificación en"
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__write_uid
+msgid "Last Updated by"
+msgstr "Última modificación de"
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__write_date
+msgid "Last Updated on"
+msgstr "Última actualización en"
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_line__previous_price
+msgid "Previous price"
+msgstr "Precio anterior"
+
+#. module: contract_price_revision
+#: model_terms:ir.ui.view,arch_db:contract_price_revision.contract_line_duplicate_wizard_view
+msgid ""
+"Set new start date and variation percent to duplicate.\n"
+"                    This process set start date previous day as end date of\n"
+"                    origin record.\n"
+"                    <br/>\n"
+"                    <br/>"
+msgstr ""
+"Establezca nueva fecha y porcentaje de variación para duplicar.\n"
+"                      Este proceso establece la fecha de inicio anterior como fecha de finalización de registro de origen.\n"
+"<br/>\n"
+"<br/>"
+
+#. module: contract_price_revision
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_line__variation_percent
+#: model:ir.model.fields,field_description:contract_price_revision.field_contract_price_revision_wizard__variation_percent
+msgid "Variation %"
+msgstr "Variación %"
+
+#. module: contract_price_revision
+#: model:ir.model,name:contract_price_revision.model_contract_price_revision_wizard
+msgid "Wizard to update price based on percentage variation"
+msgstr "Asistente para actualizar el precio basado en un porcentaje de variación"

contract_price_revision/migrations/12.0.1.0.0/pre-migration.py

@@ -0,0 +1,29 @@
+# Copyright 2020 Tecnativa - Carlos Dauden
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+import logging
+
+from openupgradelib import openupgrade
+
+_logger = logging.getLogger(__name__)
+
+
+@openupgrade.migrate()
+def migrate(env, version):
+    """
+    Update values from old previous_revision_id to predecessor_contract_line_id
+    """
+    if not openupgrade.column_exists(
+            env.cr, 'contract_line', 'previous_revision_id'):
+        return
+
+    _logger.info("previous_revision_id to predecessor_contract_line_id")
+    openupgrade.logged_query(
+        env.cr,
+        """
+        UPDATE contract_line
+        SET    predecessor_contract_line_id=previous_revision_id
+        WHERE  previous_revision_id IS NOT NULL AND (
+        predecessor_contract_line_id IS NULL OR predecessor_contract_line_id=0)
+        """,
+    )

contract_price_revision/models/__init__.py

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+from . import contract_line

contract_price_revision/models/contract_line.py

@@ -0,0 +1,31 @@
+# Copyright 2019 Tecnativa - Vicent Cubells
+# Copyright 2019 Tecnativa - Carlos Dauden
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+
+from odoo import api, fields, models
+import odoo.addons.decimal_precision as dp
+
+
+class ContractLine(models.Model):
+    _inherit = 'contract.line'
+
+    previous_price = fields.Float(
+        string='Previous price',
+        related='predecessor_contract_line_id.price_unit',
+        readonly=True,
+    )
+    variation_percent = fields.Float(
+        compute='_compute_variation_percent',
+        store=True,
+        digits=dp.get_precision('Product Price'),
+        string='Variation %',
+    )
+
+    @api.depends('price_unit', 'predecessor_contract_line_id.price_unit')
+    def _compute_variation_percent(self):
+        for line in self:
+            if line.price_unit and line.previous_price:
+                line.variation_percent = (
+                    (line.price_unit / line.previous_price - 1) * 100)
+            else:
+                line.variation_percent = 0.0

contract_price_revision/readme/CONTRIBUTORS.rst

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+* `Tecnativa <https://www.tecnativa.com>`_:
+
+  * Vicent Cubells
+  * Carlos Dauden

contract_price_revision/readme/DESCRIPTION.rst

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+This module allows to create revisions of contract line prices.

contract_price_revision/readme/USAGE.rst

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+To use this module:
+
+#. Go to **Invoicing > Customers > Customer Contracts** if you are a billing
+   user.
+#. Select as many contracts as you want to update line prices.
+#. Click on Action button and execute the wizard **Create revision of contract
+   lines**.
+#. Enter date start from which the new price will be valid and enter date
+   end and percentage to increase old contract lines.
+#. By clicking on Apply button, a new contract line will be created with
+   a price increased accordingly to the percent entered. Old contract lines
+   will have as ending date the day before the entered date.
+#. When create invoices related to contracts selected, prices will be update
+   with the prices that are not out of date.

contract_price_revision/static/description/index.html

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+<title>Contract Price Revision</title>
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+
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+</head>
+<body>
+<div class="document" id="contract-price-revision">
+<h1 class="title">Contract Price Revision</h1>
+
+<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+!! This file is generated by oca-gen-addon-readme !!
+!! changes will be overwritten.                   !!
+!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
+<p><a class="reference external" href="http://www.gnu.org/licenses/agpl-3.0-standalone.html"><img alt="License: AGPL-3" src="https://img.shields.io/badge/licence-AGPL--3-blue.png" /></a> <a class="reference external" href="https://github.com/OCA/contract/tree/12.0/contract_price_revision"><img alt="OCA/contract" src="https://img.shields.io/badge/github-OCA%2Fcontract-lightgray.png?logo=github" /></a> <a class="reference external" href="https://translation.odoo-community.org/projects/contract-12-0/contract-12-0-contract_price_revision"><img alt="Translate me on Weblate" src="https://img.shields.io/badge/weblate-Translate%20me-F47D42.png" /></a> <a class="reference external" href="https://runbot.odoo-community.org/runbot/110/12.0"><img alt="Try me on Runbot" src="https://img.shields.io/badge/runbot-Try%20me-875A7B.png" /></a></p>
+<p>This module allows to create revisions of contract line prices.</p>
+<p><strong>Table of contents</strong></p>
+<div class="contents local topic" id="contents">
+<ul class="simple">
+<li><a class="reference internal" href="#usage" id="id1">Usage</a></li>
+<li><a class="reference internal" href="#bug-tracker" id="id2">Bug Tracker</a></li>
+<li><a class="reference internal" href="#credits" id="id3">Credits</a><ul>
+<li><a class="reference internal" href="#authors" id="id4">Authors</a></li>
+<li><a class="reference internal" href="#contributors" id="id5">Contributors</a></li>
+<li><a class="reference internal" href="#maintainers" id="id6">Maintainers</a></li>
+</ul>
+</li>
+</ul>
+</div>
+<div class="section" id="usage">
+<h1><a class="toc-backref" href="#id1">Usage</a></h1>
+<p>To use this module:</p>
+<ol class="arabic simple">
+<li>Go to <strong>Invoicing &gt; Customers &gt; Customer Contracts</strong> if you are a billing
+user.</li>
+<li>Select as many contracts as you want to update line prices.</li>
+<li>Click on Action button and execute the wizard <strong>Create revision of contract
+lines</strong>.</li>
+<li>Enter date start from which the new price will be valid and enter date
+end and percentage to increase old contract lines.</li>
+<li>By clicking on Apply button, a new contract line will be created with
+a price increased accordingly to the percent entered. Old contract lines
+will have as ending date the day before the entered date.</li>
+<li>When create invoices related to contracts selected, prices will be update
+with the prices that are not out of date.</li>
+</ol>
+</div>
+<div class="section" id="bug-tracker">
+<h1><a class="toc-backref" href="#id2">Bug Tracker</a></h1>
+<p>Bugs are tracked on <a class="reference external" href="https://github.com/OCA/contract/issues">GitHub Issues</a>.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us smashing it by providing a detailed and welcomed
+<a class="reference external" href="https://github.com/OCA/contract/issues/new?body=module:%20contract_price_revision%0Aversion:%2012.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**">feedback</a>.</p>
+<p>Do not contact contributors directly about support or help with technical issues.</p>
+</div>
+<div class="section" id="credits">
+<h1><a class="toc-backref" href="#id3">Credits</a></h1>
+<div class="section" id="authors">
+<h2><a class="toc-backref" href="#id4">Authors</a></h2>
+<ul class="simple">
+<li>Tecnativa</li>
+</ul>
+</div>
+<div class="section" id="contributors">
+<h2><a class="toc-backref" href="#id5">Contributors</a></h2>
+<ul class="simple">
+<li><a class="reference external" href="https://www.tecnativa.com">Tecnativa</a>:<ul>
+<li>Vicent Cubells</li>
+<li>Carlos Dauden</li>
+</ul>
+</li>
+</ul>
+</div>
+<div class="section" id="maintainers">
+<h2><a class="toc-backref" href="#id6">Maintainers</a></h2>
+<p>This module is maintained by the OCA.</p>
+<a class="reference external image-reference" href="https://odoo-community.org"><img alt="Odoo Community Association" src="https://odoo-community.org/logo.png" /></a>
+<p>OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.</p>
+<p>Current <a class="reference external" href="https://odoo-community.org/page/maintainer-role">maintainer</a>:</p>
+<p><a class="reference external" href="https://github.com/carlosdauden"><img alt="carlosdauden" src="https://github.com/carlosdauden.png?size=40px" /></a></p>
+<p>This module is part of the <a class="reference external" href="https://github.com/OCA/contract/tree/12.0/contract_price_revision">OCA/contract</a> project on GitHub.</p>
+<p>You are welcome to contribute. To learn how please visit <a class="reference external" href="https://odoo-community.org/page/Contribute">https://odoo-community.org/page/Contribute</a>.</p>
+</div>
+</div>
+</div>
+</body>
+</html>

contract_price_revision/tests/__init__.py

@@ -0,0 +1 @@
+from . import test_contract_price_revision

contract_price_revision/tests/test_contract_price_revision.py

@@ -0,0 +1,44 @@
+# Copyright 2019 Tecnativa - Vicent Cubells
+# Copyright 2019 Tecnativa - Carlos Dauden
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+
+from odoo.addons.contract.tests.test_contract import TestContractBase
+
+
+class TestContractPriceRevision(TestContractBase):
+
+    def execute_wizard(self):
+        wizard = self.env['contract.price.revision.wizard'].create({
+            'date_start': '2018-02-15',
+            'variation_percent': 100.0,
+        })
+        wizard.with_context(
+            {'active_ids': [self.contract.id]}).action_apply()
+
+    def test_contract_price_revision_wizard(self):
+        # This is for checking if this line is not versioned
+        self.acct_line.copy({'automatic_price': True})
+        self.assertEqual(len(self.contract.contract_line_ids.ids), 2)
+        self.execute_wizard()
+        self.assertEqual(len(self.contract.contract_line_ids.ids), 3)
+        lines = self.contract.contract_line_ids.filtered(
+            lambda x: x.price_unit == 200.0)
+        self.assertEqual(len(lines), 1)
+
+    def test_contract_price_revision_invoicing(self):
+        self.acct_line.copy({'automatic_price': True})
+        self.execute_wizard()
+        invoice = self.contract.recurring_create_invoice()
+        invoices = self.env['account.invoice'].search([
+            ('invoice_line_ids.contract_line_id', 'in',
+             self.contract.contract_line_ids.ids)])
+        self.assertEqual(len(invoices), 1)
+        lines = invoice.invoice_line_ids
+        self.assertEqual(len(lines), 2)
+        lines = lines.filtered(lambda x: x.price_unit == 100.0)
+        self.assertEqual(len(lines), 1)
+        invoice = self.contract.recurring_create_invoice()
+        lines = invoice.invoice_line_ids
+        self.assertEqual(len(lines), 2)
+        lines = lines.filtered(lambda x: x.price_unit == 200.0)
+        self.assertEqual(len(lines), 1)

contract_price_revision/views/contract_line.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <record id="contract_line_tree_view" model="ir.ui.view">
+        <field name="model">contract.line</field>
+        <field name="inherit_id" ref="contract.contract_line_tree_view"/>
+        <field name="arch" type="xml">
+            <field name="last_date_invoiced" position="after">
+                <field name="variation_percent" groups="base.group_no_one"/>
+            </field>
+        </field>
+    </record>
+
+    <record id="contract_line_form_view" model="ir.ui.view">
+        <field name="model">contract.line</field>
+        <field name="inherit_id" ref="contract.contract_line_form_view"/>
+        <field name="arch" type="xml">
+            <field name="discount" position="after">
+                <field name="variation_percent"
+                       groups="base.group_no_one"
+                       attrs="{'invisible': [('predecessor_contract_line_id', '=', False)]}"/>
+            </field>
+        </field>
+    </record>
+
+</odoo>

contract_price_revision/wizards/__init__.py

@@ -0,0 +1 @@
+from . import contract_price_revision

contract_price_revision/wizards/contract_price_revision.py

@@ -0,0 +1,64 @@
+# Copyright 2019 Tecnativa - Vicent Cubells
+# Copyright 2019 Tecnativa - Carlos Dauden
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+
+from dateutil.relativedelta import relativedelta
+
+from odoo import fields, models
+import odoo.addons.decimal_precision as dp
+
+
+class ContractPriceRevisionWizard(models.TransientModel):
+    """ Update contract price based on percentage variation """
+    _name = 'contract.price.revision.wizard'
+    _description = "Wizard to update price based on percentage variation"
+
+    date_start = fields.Date(
+        required=True,
+    )
+    date_end = fields.Date()
+    variation_percent = fields.Float(
+        digits=dp.get_precision('Product Price'),
+        required=True,
+        string='Variation %',
+    )
+
+    def action_apply(self):
+        ContractLine = self.env['contract.line']
+        active_ids = self.env.context.get('active_ids')
+        contracts = self.env['contract.contract'].browse(active_ids)
+        for line in self._get_contract_lines_to_revise(contracts):
+            line.update({
+                'date_end': self.date_start - relativedelta(days=1),
+            })
+            new_vals = line.copy_data({
+                'date_start': self.date_start,
+                'date_end': self.date_end,
+                'predecessor_contract_line_id': line.id,
+                'price_unit': line.price_unit * (
+                    1.0 + self.variation_percent / 100.0),
+            })[0]
+            tmp_line = ContractLine.new(new_vals)
+            tmp_line._onchange_date_start()
+            new_line = ContractLine.create(
+                tmp_line._convert_to_write(tmp_line._cache))
+            line.update({
+                'successor_contract_line_id': new_line.id,
+            })
+        action = self.env['ir.actions.act_window'].for_xml_id(
+            'contract', 'action_customer_contract')
+        action['domain'] = [('id', 'in', active_ids)]
+        return action
+
+    def _get_contract_lines_to_revise(self, contracts):
+        self.ensure_one()
+        to_revise = (
+            contracts.mapped("contract_line_ids")
+            .filtered(
+                lambda x: not x.automatic_price
+                and not x.successor_contract_line_id
+                and x.recurring_next_date
+                and (not x.date_end or x.date_end >= self.date_start)
+            )
+        )
+        return to_revise

contract_price_revision/wizards/contract_price_revision_views.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <record id="contract_line_duplicate_wizard_view" model="ir.ui.view">
+        <field name="name">Create Revision Line</field>
+        <field name="model">contract.price.revision.wizard</field>
+        <field name="arch" type="xml">
+            <form>
+                <div>
+                    Set new start date and variation percent to duplicate.
+                    This process set start date previous day as end date of
+                    origin record.
+                    <br/>
+                    <br/>
+                </div>
+                <group>
+                    <group>
+                        <field name="date_start"/>
+                        <field name="date_end"/>
+                        <field name="variation_percent"/>
+                    </group>
+                </group>
+                <footer>
+                    <button string="Apply" name="action_apply"
+                            type="object" class="oe_highlight"/>
+                    <button string="Cancel" class="oe_link" special="cancel"/>
+                </footer>
+            </form>
+        </field>
+    </record>
+
+    <act_window id="contract_line_duplicate_wizard_action"
+        name="Create revision of contract lines"
+        src_model="contract.contract"
+        res_model="contract.price.revision.wizard"
+        view_type="form" view_mode="form"
+        key2="client_action_multi" target="new"
+    />
+
+</odoo>