Odoo 15 Helpdesk formatting ID field - formatting

Question

I need help with the modul Helpdesk. I wanted to add the field ID into the tree view via Addon. I could manage to do so, but now I want to format the field like this Ticket ID : #1234, at the moment its in this kind of format : Ticket ID 1,234. I also can´t find the field ID in the source code.
This my code for the tree view:
<!-- Helpdesk Addon Tree View -->
<record id="helpdesk_addon_tree_view" model="ir.ui.view">
<field name="name">view.helpdesk.addon.tree</field>
<field name="model">helpdesk.ticket</field>
<field name="inherit_id" ref="helpdesk.helpdesk_tickets_view_tree"/>
<field name="arch" type="xml">
<field name="display_name" position="before">
<field name="id" string="ID"/>
</field>
<field name="stage_id" position="after">
<field name="create_date"/>
</field>
</field>
</record>
</odoo>

Answer 1

The id is a number and you can't format it, as a workaround you can add new Char field and override create method to fill it then you can use the new created field in the list view.
from odoo import models, api, fields, _
class HelpdeskTicket(models.Model):
_inherit = 'helpdesk.ticket'
ticket_no = fields.Char(string="Ticket No")
#api.model_create_multi
def create(self, list_value):
tickets = super(HelpdeskTicket, self).create(list_value)
# set ticket Id
for ticket in tickets:
if ticket.id:
ticket.ticket_no= '#' + str(ticket.id)
return tickets
XML will be:
<!-- Helpdesk Addon Tree View -->
<record id="helpdesk_addon_tree_view" model="ir.ui.view">
<field name="name">view.helpdesk.addon.tree</field>
<field name="model">helpdesk.ticket</field>
<field name="inherit_id" ref="helpdesk.helpdesk_tickets_view_tree"/>
<field name="arch" type="xml">
<field name="display_name" position="before">
<field name="ticket_no" string="ID"/>
</field>
<field name="stage_id" position="after">
<field name="create_date"/>
</field>
</field>
</record>
</odoo>