objective c - Parse JSON Post with ISODate Object mongoDB - Node.js -

i'm trying parse json document mongodb isodate...but field string , not isodate. how can send json isodate without change node.js post method receive json , save in collection

   - (nsdictionary*) todictionary {     nsmutabledictionary* jsonable = [nsmutabledictionary dictionary];     nsstring *dataeventoiso = [nsstring stringwithformat:@"isodate(%@)",self.dataevento];     safeset(jsonable, @"name", self.name);     safeset(jsonable, @"placename", self.placename);     safeset(jsonable, @"location", self.location);     safeset(jsonable, @"details", self.details);     safeset(jsonable, @"imageid", self.imageid);     safeset(jsonable, @"categories", self.categories);     safeset(jsonable, @"_id", self._id);     safeset(jsonable, @"usuarioid", self.usuarioid);     safeset(jsonable, @"status", self.status);     safeset(jsonable, @"emailusuario", self.emailusuario);     safeset(jsonable, @"dataevento", dataeventoiso);     return jsonable; } 

and method post:

 - (void) persist:(location*)location {     appdelegate *appdelegate = (appdelegate *)[[uiapplication sharedapplication]delegate];      if (!location || location.name == nil || location.name.length == 0) {         return; //input safety check     }      //if there image, save first     if (location.image != nil && location.imageid == nil) { //1         [self savenewlocationimagefirst:location]; //2         return;                  }      nsstring* locations = [kbaseurl stringbyappendingpathcomponent:klocations];      bool isexistinglocation = location._id != nil;      if(!isexistinglocation)         location.votos = @"0";      nsstring *urlstr = isexistinglocation ? [locations stringbyappendingpathcomponent:location._id] : locations;     nsurl* url = [nsurl urlwithstring:urlstr]; //1      nsmutableurlrequest* request = [nsmutableurlrequest requestwithurl:url];     request.httpmethod = isexistinglocation ? @"put" : @"post"; //2     location.usuarioid = appdelegate.usuariologado.identificador;      if([location.status length] < 1 || [location.status isequaltostring:@"(null)"])         location.status = @"0";     location.emailusuario = appdelegate.usuariologado.email;     nsdata* data = [nsjsonserialization datawithjsonobject:[location todictionary] options:0 error:null]; //3      request.httpbody = data;        [request addvalue:@"application/json" forhttpheaderfield:@"content-type"]; //4      nsurlsessionconfiguration* config = [nsurlsessionconfiguration defaultsessionconfiguration];     nsurlsession* session = [nsurlsession sessionwithconfiguration:config];      nsurlsessiondatatask* datatask = [session datataskwithrequest:request completionhandler:^(nsdata *data, nsurlresponse *response, nserror *error) { //5         if (!error) {              nsarray* responsearray = @[[nsjsonserialization jsonobjectwithdata:data options:0 error:null]];            [self parseandaddlocations:responsearray toarray:self.objects];             dispatch_group_leave([appdelegate appdelegate].grupo_persist);         }     }];     [datatask resume];  } 

i edited rest api , works great!

 collectiondriver.prototype.save = function(collectionname, obj, callback) {     this.getcollection(collectionname, function(error, the_collection) { //a       if( error ) callback(error)       else {         if(obj.dataevento)          obj.dataevento = new date(obj.dataevento);         the_collection.insert(obj, function() { //c           callback(null, obj);         });       }     }); };