I hr.employee ,create 3 date field for notification to employee to expire his document details.In my scheduler function call is invoked only three steps after that its not working any thing ,and functionality is stuck ,if I use a button for this action then mail alert is working perfectly.issue is in my scheduled action below is my code....

.py

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class hr_employee(osv.osv):

_inherit = 'hr.employee'

_columns = {

  'passport_expiry':fields.date('Passport expiry'),

'visa_issue':fields.date('Visa issue Date'),

'visa_expiry':fields.date('Visa Expiry'),

'emirates_id_expiry':fields.date('Emirates ID Expiry'),

'join_date':fields.date('Join Date'),

'insurance_id_expiry':fields.date('Insurance Expiry'),

'departmnet_id':fields.many2one('hr.department','Department'),

'division':fields.many2one('hr.division','Division'),

'expiry_day_limit':fields.integer('Limit(Alert before/Days?)'),

'last_working_date_employee':fields.date('Last Working Date')

#'limit_days':fields.integer('Limint')

}

def send_expiry_email(self, cr, uid, ids=None, context=None):

print 'o'*200

  today = datetime.datetime.today()

today = datetime.datetime.strptime(datetime.datetime.strftime(today, DF), DF)

  print "DF -->> ", DF            #################DF -->> %Y-%m-%d  )after this line code is not excecuting.............

for partner in self.browse(cr, uid, ids, context=context):  #From Here Scheduler is not working

  passport_expiry_days = 0

visa_expiry_days=0

emirates_id_expiry_days=0

insuarance_id_expiry_days=0

if partner.passport_expiry:

passport_expiry = datetime.datetime.strptime(partner.passport_expiry, DF) - today

if int(passport_expiry.days) <= partner.expiry_day_limit:

passport_expiry_days = passport_expiry.days

  if partner.visa_expiry:

visa_expiry = datetime.datetime.strptime(partner.visa_expiry, DF) - today

  if int(visa_expiry.days) <= partner.expiry_day_limit:

visa_expiry_days = visa_expiry.days

  if partner.emirates_id_expiry:

emirates_id_expiry = datetime.datetime.strptime(partner.emirates_id_expiry, DF) - today

  if int(emirates_id_expiry.days) <= partner.expiry_day_limit:

emirates_id_expiry_days = emirates_id_expiry.days

if partner.insurance_id_expiry:

insuarance_id_expiry = datetime.datetime.strptime(partner.insurance_id_expiry, DF) - today

if int(insuarance_id_expiry.days) <= partner.expiry_day_limit:

insuarance_id_expiry_days = insuarance_id_expiry.days

partner_email=partner.work_email

passport_expiry=partner.passport_expiry

visa_expiry=partner.visa_expiry

emirates_expiry=partner.emirates_id_expiry

insurance_expiry=partner.insurance_id_expiry

  body = "Employee %s has Expired" %( partner.name)

footer="Please Update Your details"

if passport_expiry_days:

body = "%s passport on %s day," % (body,passport_expiry)

if visa_expiry_days:

body = "%s Visa %s on day," % (body,visa_expiry)

if emirates_id_expiry_days:

body = "%s Emirates %s on day," %( body,emirates_expiry)

if insuarance_id_expiry_days:

body = "%s Insurance %s on day," % (body,insurance_expiry)

mail_values= {

'body_html' :'<pre><span class="inner-pre" style="font-size: 15px">%s</br>%s</span></pre>' %(body,footer),

'record_name': 'dsdds',

'email_from': 'test@yahoo.in',

'email_to': partner_email,

'subject': 'Employee Expiry Details'

}

mail_id = self.pool.get('mail.mail').create(cr, uid, mail_values, context=context)

self.pool.get('mail.mail').send(cr, uid, [mail_id])

return True

.xml file

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<record id="ir_cron_employee_expiry_info" model="ir.cron">

<field name="name">Employee Document Expiry scheduler</field>

<field eval="True" name="active"/>

<field name="interval_number">1</field>

<field name="interval_type">minutes</field>

<field name="numbercall">-1</field>

<field eval="False" name="doall"/>

<field eval="'hr.employee'" name="model"/>

<field eval="'send_expiry_email'" name="function"/>

<field eval="'()'" name="args"/>

</record>