[12.0][IMP] - Use sale.group_discount_per_so_line on discount field

contract_sale/__manifest__.py

@@ -16,6 +16,7 @@
         'security/ir.model.access.csv',
         'security/account_analytic_account_security.xml',
         'views/account_analytic_account_view.xml',
+        'views/account_analytic_contract_view.xml',
     ],
     'license': 'AGPL-3',
     'installable': True,

contract_sale/views/account_analytic_account_view.xml

@@ -1,6 +1,22 @@
 <?xml version="1.0" encoding="utf-8"?>
 <odoo>
 
+    <record id="account_analytic_account_recurring_form_form"
+            model="ir.ui.view">
+        <field name="name">Contract form (in contract_sale)</field>
+        <field name="model">account.analytic.account</field>
+        <field name="inherit_id"
+               ref="contract.account_analytic_account_recurring_form_form"/>
+        <field name="arch" type="xml">
+
+            <xpath expr="//field[@name='discount']" position="attributes">
+                <attribute name="groups">sale.group_discount_per_so_line
+                </attribute>
+            </xpath>
+
+        </field>
+    </record>
+
     <menuitem
         id="menu_contract_sale" name="Contracts"
         parent="sale.sale_order_menu"

contract_sale/views/account_analytic_contract_view.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <record id="account_analytic_contract_view_form" model="ir.ui.view">
+        <field name="name">Account Analytic Contract Form View (in
+            sale_contract)
+        </field>
+        <field name="model">account.analytic.contract</field>
+        <field name="inherit_id"
+               ref="contract.account_analytic_contract_view_form"/>
+        <field name="arch" type="xml">
+
+            <xpath expr="//field[@name='discount']" position="attributes">
+                <attribute name="groups">sale.group_discount_per_so_line
+                </attribute>
+            </xpath>
+
+        </field>
+    </record>
+
+</odoo>