diff --git a/contract_line_extended/README.rst b/contract_line_extended/README.rst
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+.. image:: https://img.shields.io/badge/licence-AGPL--3-blue.svg
+    :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+    :alt: License: AGPL-3
+
+======================
+Contract line extended
+======================
+
+Defines a number of related fields from account_analytic_account to
+make it easy to search/select contract lines on partner, or start/end date
+of the contract.
+
+Configuration
+=============
+
+There is no specific configuration for this module.
+
+Usage
+=====
+
+This module is a technical module, needed for modules that need to select
+contract lines by partner, or from other referential fields from the
+contract.
+
+.. image:: https://odoo-community.org/website/image/ir.attachment/5784_f2813bd/datas
+   :alt: Try me on Runbot
+   :target: https://runbot.odoo-community.org/runbot/110/10.0
+
+Known issues / Roadmap
+======================
+
+None.
+
+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.
+
+Credits
+=======
+
+Contributors
+------------
+
+* Ronald Portier <ronald@therp.nl>
+
+Maintainer
+----------
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://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 https://odoo-community.org.
diff --git a/contract_line_extended/__init__.py b/contract_line_extended/__init__.py
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+# -*- coding: utf-8 -*-
+# Copyright 2017 Therp BV.
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+from . import models
diff --git a/contract_line_extended/__manifest__.py b/contract_line_extended/__manifest__.py
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+++ b/contract_line_extended/__manifest__.py
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+# -*- coding: utf-8 -*-
+# Copyright 2017-2018 Therp BV <https://therp.nl>.
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+{
+    'name': 'Contract Line Extended',
+    'version': '10.0.1.0.0',
+    'category': 'Contract Management',
+    'license': 'AGPL-3',
+    'author': "Therp BV, "
+              "Odoo Community Association (OCA)",
+    'website': 'https://github.com/oca/contract',
+    'depends': [
+        'contract',
+    ],
+    'data': [
+    ],
+    'installable': True,
+}
diff --git a/contract_line_extended/models/__init__.py b/contract_line_extended/models/__init__.py
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+++ b/contract_line_extended/models/__init__.py
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+# -*- coding: utf-8 -*-
+# Copyright 2017-2018 Therp BV <https://therp.nl>.
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+from . import account_analytic_invoice_line
diff --git a/contract_line_extended/models/account_analytic_invoice_line.py b/contract_line_extended/models/account_analytic_invoice_line.py
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+++ b/contract_line_extended/models/account_analytic_invoice_line.py
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+# -*- coding: utf-8 -*-
+# Copyright 2018 Therp BV <https://therp.nl>.
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+from odoo import fields, models
+
+
+class AccountAnalyticInvoiceLine(models.Model):
+    _inherit = 'account.analytic.invoice.line'
+
+    partner_id = fields.Many2one(
+        related='analytic_account_id.partner_id',
+        store=True,
+        readonly=True)
+    date_start = fields.Date(
+        related='analytic_account_id.date_start',
+        store=True,
+        readonly=True)
+    date_end = fields.Date(
+        related='analytic_account_id.date_end',
+        store=True,
+        readonly=True)