[IMP] - show related sale orders in contract form

product_contract/models/contract.py

@@ -0,0 +1,35 @@
+# Copyright 2018 ACSONE SA/NV
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import api, fields, models
+from odoo.tools.translate import _
+
+
+class AccountAnalyticAccount(models.Model):
+    _name = 'account.analytic.account'
+    _inherit = 'account.analytic.account'
+
+    sale_order_count = fields.Integer(compute="_compute_sale_order_count")
+
+    @api.depends('recurring_invoice_line_ids')
+    def _compute_sale_order_count(self):
+        for rec in self:
+            rec.sale_order_count = len(
+                rec.recurring_invoice_line_ids.mapped(
+                    'sale_order_line_id.order_id'
+                )
+            )
+
+    @api.multi
+    def action_view_sales_orders(self):
+        self.ensure_one()
+        orders = self.recurring_invoice_line_ids.mapped(
+            'sale_order_line_id.order_id'
+        )
+        return {
+            "name": _("Sales Orders"),
+            "view_mode": "tree,form",
+            "res_model": "sale.order",
+            "type": "ir.actions.act_window",
+            "domain": [("id", "in", orders.ids)],
+        }