CM

gistfile1.m

CMUser* user = [[CMUser alloc] initWithUsername:@"jim" password:@"pw"];
Recipe* r = [[Recipe alloc] initWithUser:... name:.....];
Review* rv = [[Review alloc] initWithUser:user recipe:r stars:5];

CMFuture* future = [user saveFuture];
CMFuture* future2 = [future andThen:^{ return [r saveFuture]; }];
CMFuture* future3 = [future andThen:^{ return [rv saveFuture]; }];

// or: future3 =
//     [CMFuture doSeq:^{ return [user saveFuture]; },
//                     ^{ return [r saveFuture]; }, 
//                     ^{ return [rv saveFuture]; },nil];

// If any of the futures fail for any reason, rollback the entire transaction
// all or nothing

[future3 execWithCallback:^(CMFutureStatus status, NSArray* messages, NSDictionary* statuses){
   if (status == CMFutureFailed) {
      [Util showCMFailAlerts(messages);
   } else {
      [Util showObjectSavedOK(statuses);
}];