class Destination(osv.osv):

_name = 'destination.destination'
_description = 'destination.destination'

_columns = {


           'destin_id':fields.many2one('tour.destination','Destination',required=True),
           'country':fields.related('destin_id','country',type="many2one",relation="res.country",string="Country", required=True),
           'noofnights':fields.integer('No:of Nights',required=False),
           'prg_id':fields.many2one('tour.create','pgmq'),
           'hotelinfo_id':fields.one2many('hotel.info','dest_id')
                }

Destination()

class Tourdestination(osv.osv):

_name = 'tour.destination'
_description = 'tour.destination'

_columns = {

         'name':fields.char('Destination Name', size=64, required=True, readonly=False),
           'code':fields.char('Code', size=64, required=True, readonly=False),
             'country':fields.many2one('res.country','Country', size=64, required=True, readonly=False)  
                    }

Tourdestination()