objective c - CouchDb views not updating -

okay i'm using couchdb v 1.2.0 scheme application objective-c. when run program i'm deleting old version of database , creating new 1 this:

couchdb *couchdb = [[couchdb alloc]init];         //deleting old version of db if exists xcode demo         [couchdb deletedb:@"timevault" oncomplete:^(nsstring *message) {             nslog(@"%@", message);          }];         //creating new db         [couchdb createdb:@"timevault" oncomplete:^(nsstring *message) {             nslog(@"%@", message);         }];         //creating views students , courses         nsstring *viewcourses = @"function (doc) {      if (doc.type === \"course\") {        emit(doc._id, doc);      }    }";         nsstring *viewstudents = @"function (doc) {      if (doc.type === \"student\") {        emit(doc._id, doc);      }    }";         nsdictionary *views = @{@"views": @{@"courses": @{@"map":viewcourses}, @"students": @{@"map":viewstudents}}};          //saving design document db         [couchdb createviewindb:views oncomplete:^(nsstring *message) {             nslog(@"%@", message);         }]; 

class implementation:

    -(void)deletedb:(nsstring *)name oncomplete:(message)message{         nsmutablestring *url = [[nsmutablestring alloc]initwithstring:@"http://localhost:5984/"];         [url appendstring:name];         request = [nsmutableurlrequest requestwithurl:[nsurl urlwithstring:url]];         [request sethttpmethod:@"delete"];         nsurlresponse *responsecode = nil;         nserror *error = nil;         [nsurlconnection sendsynchronousrequest:request returningresponse:&responsecode error:&error];         if (!error) {             nshttpurlresponse *httpresponse = (nshttpurlresponse*)responsecode;             nsnumber *responsestatuscode = [[nsnumber alloc] initwithlong:[httpresponse statuscode]];             if ([responsestatuscode isequaltonumber:[nsnumber numberwithint:200]]) {                 message([nsstring stringwithformat:@"old db %@ deleted", name]);             }         }else {             message([nsstring stringwithformat:@"error: %@", [error localizeddescription]]);         }     } -(void)createdb:(nsstring *)name oncomplete:(message)message{     nsmutablestring *url = [[nsmutablestring alloc]initwithstring:@"http://localhost:5984/"];     [url appendstring:name];     request = [nsmutableurlrequest requestwithurl:[nsurl urlwithstring:url]];     [request sethttpmethod:@"put"];     nsurlresponse *responsecode = nil;     nserror *error = nil;     [nsurlconnection sendsynchronousrequest:request returningresponse:&responsecode error:&error];     if (!error) {         nshttpurlresponse *httpresponse = (nshttpurlresponse*)responsecode;         nsnumber *responsestatuscode = [[nsnumber alloc] initwithlong:[httpresponse statuscode]];         if ([responsestatuscode isequaltonumber:[nsnumber numberwithint:412]]) {           message(@"db exists, no new db created");         }else if ([responsestatuscode isequaltonumber:[nsnumber numberwithint:201]]){             message([nsstring stringwithformat:@"db %@ created", name]);         }     }else {         message([nsstring stringwithformat:@"error: %@", [error localizeddescription]]);     }  } -(void)createviewindb:(nsdictionary *)view oncomplete:(message)message{     nsmutablestring *url = [[nsmutablestring alloc]initwithstring:url];     [url appendstring:@"/_design/app"];     request = [nsmutableurlrequest requestwithurl:[nsurl urlwithstring:url]];     [request sethttpmethod:@"put"];     [request setvalue:@"application/json" forhttpheaderfield:@"content-type"];     nsdata *asjson = [nsjsonserialization datawithjsonobject:view options:nsutf8stringencoding error:nil];     [request sethttpbody:asjson];     nsurlresponse *responsecode = nil;     nserror *error = nil;     [nsurlconnection sendsynchronousrequest:request returningresponse:&responsecode error:&error];     if (!error){         nshttpurlresponse *httpresponse = (nshttpurlresponse*)responsecode;         nsnumber *responsestatuscode = [[nsnumber alloc] initwithlong:[httpresponse statuscode]];         if ([responsestatuscode isequaltonumber:[nsnumber numberwithint:201]]) {             message(@"views in db created");         }     }else {         message([nsstring stringwithformat:@"error: %@", [error localizeddescription]]);     } } 

all of synchronous requests. for couchdb pros out there doesn't know obj-c, i'm saying this:

 delete http://localhost:5984/database/  put http://localhost:5984/database/  put http://localhost:5984/database/_design/app,   content-type: application/json 

with body:

{"views":   {     "courses": {       "map": "function (doc) {               if (doc.type === \"course\") {                  emit(doc._id, doc);         }}"        },       "students": {         "map": "function (doc) {                if (doc.type === \"student\") {                   emit(doc._id, doc);              }}"       }}     } 

my problem here view: http://localhost:5984/database/_design/app/_view/students works half of time, other half it's not updating, i'm getting old id's, why this? i'm not looking @ old version of db because i'm creating new documents of students , courses , that's working. missing when i'm deleting db concerns _design document? googled around on can't find solves problem.