Hai vu van tien,

You can define a form view for the room table.

Then create a button for allocation and free the rooms.

XML

<button name="roomallocationandfree" string="Allocation/Free" type="object" class="btn-primary"/>

Python

@api.multi
def roomallocationandfree(self):
    if self.status == 1:
        self.status = 2
    else:
        self.status = 1

Regards,

Nikhilkrishnan

Hello, I think you want the field to be computed on the fly, without having to assign the value with a button right?

You can make the status field a computed field and assign its value like in my code below.

Remember to import datetime at the top of your python file, and add the field to the views you prefer!

#import required library to get current datetime
from datetime import datetime as dt
class booking_room(models.Model):
 _name = 'room'
    name = fields.Char(string="Mã phòng", required=True)
    status = fields.Selection([('1', 'Trống'), ('2', 'Bận')], string="Trạng thái", 
        required=True, compute="_get_status"
    )
    kind = fields.Selection([('3', 'A'), ('4', 'B'), ('5', 'C'), ('6', 'Vip')], 
        string="Loại phòng", required=True
    )
    price = fields.Integer(string="Giá phòng", required=True)
    description = fields.Text("Ghi chú")
    @api.multi
    def _get_status(self):
        # Get the current datetime in the format that time_in and time_out fields 
        # are stored in the database
        now = dt.now().strftime('%Y-%m-%d %H:%M:%S')
        for room in self:
            # look for guests that have a room booked now, and whose room id is the current
            # the order is important because as the guest table grows, 
            # the nº of rows that satisfy the conditions will be lower for the first one, 
            # bigger for the second, and the biggest for the last one, 
            # and the search will be faster this way.
            # guest_in_room will be True is len(search)>0, False otherwise.
            guest_in_room = len(self.env['guest'].search([
                ('time_out', '>', now), 
                ('time_in', '<', now), 
                ('roomsd', '=', room.id)
            ])) > 0
            # If guest_in_room is True, room's status is busy, free otherwise
            if guest_in_room:
                room.status = '2'
            else:
                room.status = '1'

 Regards,

Juan Albarracin

You can use state:

Ex:

https://github.com/odoo/odoo/blob/11.0/addons/hr_holidays/models/hr_holidays.py#L159-L170

https://github.com/odoo/odoo/blob/11.0/addons/hr_holidays/views/hr_holidays_views.xml#L83-L89

 thank you
Juan Albarracin
  has answered, but to me, it does not work. fields
 'status' does not work, whether or not the "guest" reservation or not 
"status" returned is always "blank" and can not be tampered with or 
created.