[FIX]add a field to sort hr_employee by name

lp bug: https://launchpad.net/bugs/1077140 fixed

bzr revid: csn@openerp.com-20121113153645-0lywi300wseowczw

addons/hr/hr.py

@@ -158,6 +158,8 @@ class hr_employee(osv.osv):
         return self.write(cr, uid, [id], {'image': tools.image_resize_image_big(value)}, context=context)
     
     _columns = {
+        #we need a related field in order to be able to sort the employee by name
+        'name_related': fields.related('resource_id', 'name', type='char', string='Name', readonly=True, store=True),
         'country_id': fields.many2one('res.country', 'Nationality'),
         'birthday': fields.date("Date of Birth"),
         'ssnid': fields.char('SSN No', size=32, help='Social Security Number'),
@@ -207,6 +209,8 @@ class hr_employee(osv.osv):
         'last_login': fields.related('user_id', 'date', type='datetime', string='Latest Connection', readonly=1),
     }
 
+    _order='name_related'
+
     def create(self, cr, uid, data, context=None):
         employee_id = super(hr_employee, self).create(cr, uid, data, context=context)
         try: