python - Overriding OpenERP constraints -


i want write module overrides 1 of constraints on model object, overriding constraint method doesn't work. override of method never gets called, because openerp uses own inheritance mechanism.

i'm trying make rules sign in / sign out actions little more flexible in hr_timesheet_sheet module employees can record hours on previous day after they've signed in today. that, want override hr.attendance constraint on action field , allow changes, perform check @ timesheet level attendance actions in logical sequence.

i found hr.attendance constraint.

def _altern_si_so(self, cr, uid, ids, context=none):     """ alternance sign_in/sign_out check.         previous (if exists) must of opposite action.         next (if exists) must of opposite action.     """     att in self.browse(cr, uid, ids, context=context):         # search , browse first previous , first next records         prev_att_ids = self.search(cr, uid, [('employee_id', '=', att.employee_id.id), ('name', '<', att.name), ('action', 'in', ('sign_in', 'sign_out'))], limit=1, order='name desc')         next_add_ids = self.search(cr, uid, [('employee_id', '=', att.employee_id.id), ('name', '>', att.name), ('action', 'in', ('sign_in', 'sign_out'))], limit=1, order='name asc')         prev_atts = self.browse(cr, uid, prev_att_ids, context=context)         next_atts = self.browse(cr, uid, next_add_ids, context=context)         # check alternance, return false if @ least 1 condition not satisfied         if prev_atts , prev_atts[0].action == att.action: # previous exists , same action             return false         if next_atts , next_atts[0].action == att.action: # next exists , same action             return false         if (not prev_atts) , (not next_atts) , att.action != 'sign_in': # first attendance must sign_in             return false     return true  _constraints = [(_altern_si_so, 'error: sign in (resp. sign out) must follow sign out (resp. sign in)', ['action'])]

i tried overriding constraint method in module, version never got called.

def _altern_si_so(self, cr, uid, ids):     """ implementing logic @ attendance level doesn't work,     skip it, , check @ whole time sheet level. 's good!"""     return true

i tried adding own constraint on same field, called both versions , base module's constraint reject save.

i found bug on launchpad describes problem i'm having , fix. turns out can override constraints now, it's fiddly. have declare own constraint on same field same function name base module. , call constraint instead of base version.

here's my module overrides hr_attendance constraint on actions , allows combination.

class hr_attendance(osv.osv):     _inherit = 'hr.attendance'      def _altern_si_so(self, cr, uid, ids):         """ implementing logic @ attendance level doesn't work,         skip it, , check @ whole time sheet level. 's good!"""         return true      _constraints = [(_altern_si_so,                       'error: should never see message.',                       ['action'])]

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