Add link to invoice from account move line form view (like in v8)

account_usability/account.py

@@ -130,6 +130,9 @@ class AccountAnalyticAccount(models.Model):
 class AccountMoveLine(models.Model):
     _inherit = 'account.move.line'
 
+    # Update field only to add a string (there is no string in account module)
+    invoice_id = fields.Many2one(string='Invoice')
+
     @api.onchange('credit')
     def _credit_onchange(self):
         prec = self.env['decimal.precision'].precision_get('Account')

account_usability/account_view.xml

@@ -191,6 +191,9 @@ module -->
         <field name="quantity" position="after">
             <field name="product_id" />
         </field>
+        <field name="move_id" position="after">
+            <field name="invoice_id"/>
+        </field>
     </field>
 </record>