Add module contract_invoice_start_end_dates

contract_invoice_start_end_dates/models/account_analytic_account.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 - Akretion
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import api, models
+
+
+class AccountAnalyticAccount(models.Model):
+    _inherit = 'account.analytic.account'
+
+    @api.model
+    def _prepare_invoice_line(self, line, invoice_id):
+        vals = super(AccountAnalyticAccount, self)._prepare_invoice_line(
+            line, invoice_id)
+        if line.product_id.must_have_dates:
+            vals.update({
+                'start_date': self.env.context['date_from'],
+                'end_date': self.env.context['date_to'],
+            })
+        return vals