odoo-test/models/hostel_room.py

from odoo import models, fields, api

class HostelRoom(models.Model):
    _name = 'hostel.room'
    currency_id = fields.Many2one('res.currency', string='Currency')
    rent_amount = fields.Monetary("Rnet Amount", help="Enter rent amount per month")
    # optional attribute: currency_field='currency_id' incase currency field have another name then 'currency_id'