I tried to create a programmed action in one module. Declared this in my view.

<record id="ir_cron_personnel_actions" model="ir.cron">
        <field name="name">Run Personnel Actions Job</field>
        <field eval="True" name="active"/>
        <field name="user_id" ref="base.user_root"/>
        <field name="interval_number">1</field>
        <field name="interval_type">days</field>
        <field name="numbercall">-1</field>
        <field eval="'hr.personnel.action'" name="model"/>
        <field eval="'run_personnel_actions'" name="function"/>
        <field eval="'()'" name="args"/>
    </record>

And then declared this on my .py file.

def run_personnel_actions(self, cr, uid, ids, context=None):
        """Runs a determined action on the date set in the field effective_date.

        Returns None"""

        #This variables holds the objects we are going to be using in each action.
        hr_obj = self.pool.get('hr.employee')
        hr_cont_obj = self.pool.get('hr.contract')
        hr_cont_rate_obj = self.pool.get('hr.contract.rate')
        hr_holiday = self.pool.get('hr.holidays')
        hr_pay_obj = self.pool.get('hr.payslip')
        hr_payslip_obj = self.pool.get('hr.payslip.input')

        actions = self.browse(cr, uid, ids, context=None)
        #Loop for traversing all records in the hr.personnel.action table and if the status is for approved and the date is today, run them.
        for action in actions:
            #These variables hold the ids of the contract and payroll associated to the employee.
            hr_cont_id = hr_cont_obj.search(cr, uid, [('employee_id', '=', action.employee_id.id)],
                                   order='id', context=None)
            hr_pay_id = hr_pay_obj.search(cr, uid, [('employee_id', '=', action.employee_id.id)], 
                                 order='id', context=None)
            hr_cont_record = hr_cont_obj.browse(cr, uid, hr_cont_id[-1], context=None)

            if action.states == 'approved' and action.effective_date == datetime.date.today():
                if action.action_requested == '1':
                    hr_payslip_obj.create(cr, uid, {'contract_id':hr_cont_id[-1], 
                                    'amount':action.proposed_bonus, 
                                    'name':"Bonus payment", 
                                    'code':1, 
                                    'payslip_id':hr_pay_id[0]}, context=None)
                    self.write(cr, uid, ids, {'states':'applied'}, context=None)

But so far it doesn't run when is supposed to, and doesn't raisee any error at all.