Hello I'm updating a function field of one2many object using on_change event. I pass the one2many object as a parameter of on_change function , and then I return it updated. Every it's ok, but when I create a new one2many object, Openerp show this error:

Client Traceback (most recent call last): File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/addons/web/common/http.py", line 180, in dispatch response["result"] = method(controller, self, **self.params) File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/addons/web/controllers/main.py", line 882, in get return self.do_get(req, model, ids, fields) File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/addons/web/controllers/main.py", line 904, in do_get records = Model.read(ids, fields, req.session.eval_context(req.context)) File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/addons/web/common/openerplib/main.py", line 250, in proxy args, kw) File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/addons/web/common/openerplib/main.py", line 117, in proxy result = self.connector.send(self.service_name, method, *args) File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/addons/web/common/http.py", line 611, in send raise fault

Server Traceback (most recent call last): File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/addons/web/common/http.py", line 592, in send result = openerp.netsvc.dispatch_rpc(service_name, method, args) File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/netsvc.py", line 360, in dispatch_rpc result = ExportService.getService(service_name).dispatch(method, params) File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/service/web_services.py", line 572, in dispatch res = fn(db, uid, params) File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/osv/osv.py", line 167, in execute_kw return self.execute(db, uid, obj, method, *args, *kw or {}) File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/osv/osv.py", line 121, in wrapper return f(self, dbname, args, *kwargs) File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/osv/osv.py", line 176, in execute res = self.execute_cr(cr, uid, obj, method, args, *kw) File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/osv/osv.py", line 164, in execute_cr return getattr(object, method)(cr, uid, args, *kw) File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/osv/orm.py", line 3381, in read result = self._read_flat(cr, user, select, fields, context, load) File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/osv/orm.py", line 3440, in _read_flat cr.execute(query, (tuple(sub_ids),)) File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/sql_db.py", line 152, in wrapper return f(self, args, *kwargs) File "/usr/local/lib/python2.7/dist-packages/openerp-6.1_1-py2.7.egg/openerp/sql_db.py", line 212, in execute res = self._obj.execute(query, params) DataError: invalid input syntax for integer: "one2many_v_id_1027" LINE 1: ..._obra_evacuacion" WHERE df_obra_evacuacion.id IN ('one2many_...

here is my code:

In conjunto_hidraulico.py class:

_columns = {
   .....
    # Obras de evacuacion
    'obra_evacuacion_ids': fields.one2many('df.obra.evacuacion', 'conjunto_hidraulico_id',
                                           string='Evacuation works', required=False),
    ......
}    

def onchange_obra_evacuacion(self, cr, uid,ids,obra_evacuacion_ids,context=None):
    if context==None:
        context={}
    if(obra_evacuacion_ids):
        ##### update tree view with calculated values ###
        compuerta_obj = self.pool.get('df.compuerta')   #objeto que tiene todas las compuertas creadas hasta ahora
        for evacuation_work in obra_evacuacion_ids:
            cant = 0
            count = 0
            text = ""
            if evacuation_work[0] == 0 or (evacuation_work[0] == 1 and evacuation_work[2].has_key('compuerta_ids')):
                for gate in evacuation_work[2]['compuerta_ids']:
                    mode = gate[0]
                    if mode == 0 or mode == 1 or mode == 4:
                        cant = cant + 1     #calculate number of gates
                        if gate[2] and gate[2].has_key('numero'):       #create working order string
                            if count == 0:
                                text += str(gate[2]['numero'])
                            else:
                                text += "-" + str(gate[2]['numero'])
                        else:
                            gate_aux = compuerta_obj.browse(cr, uid, gate[1], context=context)
                            if count == 0:
                                text += str(gate_aux.numero)
                            else:
                                text += "-" + str(gate_aux.numero)
                    elif mode == 5:
                        cant = 0
                    count += 1
                evacuation_work[2]['cantidad_compuertas'] = cant
                evacuation_work[2]['regimen_trabajo'] = text

        return {'value':{
            'obra_evacuacion_ids': obra_evacuacion_ids
        }}

In conjunto_hidraulico_view.xml:

<field colspan="4" name="obra_evacuacion_ids" nolabel="1" on_change="onchange_obra_evacuacion(obra_evacuacion_ids)"/>

In obra_evacuacion.py class:

    _columns = {
        .....        
    'compuerta_ids': fields.one2many('df.compuerta', 'obra_evacuacion_id', 'Gates', required=False),
    'cantidad_compuertas': fields.function(gates_count, type='string', method=True, string="Amount of gates",
                                           help="Quantity of gates in case of 'Spillway' category"),
    'regimen_trabajo': fields.function(working_order, type='string', method=True, string="Gates's working regime",
                                       help="Working regime of the gates in case of 'Spillway' category"),
   }

Thanks is advanced.