Hello,

I'm trying to create a module to add extra fields to hr.holidays.

I've created a new menuitem called Travel Request to inherit hr.holidays and apply extra modification.

Here's my code:

class travel_request(models.Model):
    _inherit = 'hr.holidays',
    _name = 'travel.request'
    flight_class = fields.Selection([('business_c','Business class'),('economy_c','Economy class')], 'Flight Class', required=True, readonly=True, states={'draft':[('readonly',False)], 'confirm':[('readonly',False)]}, help="Please choose your flight class", select=True)
    trip_type = fields.Selection([('business_t','Business'),('personal_t','personal'),('sales_t', 'Sales')], 'Trip Type', required=True, readonly=True, states={'draft':[('readonly',False)], 'confirm':[('readonly',False)]}, help="Please choose your desired trip type", select=True) 
    city_from = fields.Char('From', readonly=True, states={'draft':[('readonly',False)], 'confirm':[('readonly',False)]})
    city_to = fields.Char('To', readonly=True, states={'draft':[('readonly',False)], 'confirm':[('readonly',False)]})
    trip_details_ids = fields.One2many('trip.details','travel_req_id', string="Trip Details")
    
class trip_details(models.Model):
    _name = 'trip.details'
    from_city = fields.Char('From')
    to_city = fields.Char('To')
    travel_req_id = fields.Many2one('travel.request', 'Travel Request')
    

and in my view.xml:

  <record model="ir.ui.view" id="view_travel_request_form">
            <field name="name">Travel Request</field>
            <field name="model">travel.request</field>
            <field name="arch" type="xml">
                <form string="Travel Request">
 
                <sheet>
                     .
                     .
                     .
                    <notebook colspan="4">	                	
	                	<page string="Trip Details">
		                    <field name="trip_details_ids" />
		                </page>
		                <page string="Reason">
	                		<field name="notes" nolabel="1" placeholder="Add a reason..." />
	                	</page>                	
	                </notebook>
                </sheet>
                </form>
            </field>
        </record>

and here's my output view:

https://drive.google.com/open?id=0B8l_J46zjX-1VXZBRXBWY2c2YTQ

My problem is why the two char fields from_city & to_city are not showing as columns instead of the "Created by" row inside trip details?