Save hundreds of PFObjects to Parse cloud - ios

Question

I have an application where I have two parse tables - "User" and "Topics". Now what I want is that if any user signs up, then I want to create another parse table which will store some info related to that user and the topic say topic progress. Here's my code -
- (IBAction)signUpFunction {
[self.view endEditing:YES];
NSString *fullName = self.nameTextField.text;
NSString *username = self.usernameTextField.text;
NSString *password = self.passwordTextField.text;
NSString *email = self.emailTextField.text;
if ([username length] == 0 || [password length] == 0 || [email length] == 0 || [fullName length] == 0)
{
[[[UIAlertView alloc] initWithTitle:#"Missing Information"
message:#"Make sure you fill out all of the information!"
delegate:nil
cancelButtonTitle:#"ok"
otherButtonTitles:nil] show];
}
else {
PFUser *newUser = [PFUser user];
newUser.username = username;
newUser.password = password;
newUser.email = email;
newUser[#"fullName"] = fullName;
[newUser signUpInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
if (error) {
[[[UIAlertView alloc] initWithTitle:#"Error!"message:[error.userInfo objectForKey:#"error"] delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil] show ];
}
else
{
PFQuery *topicsQuery = [PFQuery queryWithClassName:#"Topic"];
[topicsQuery findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (error) {
NSLog(#"Error: %# %#", error, [error userInfo]);
}
else {
for (unsigned int i = 0; i < objects.count; i++) {
PFObject *object = objects[i];
PFObject *topicProgressForUser = [PFObject objectWithClassName:#"QuizProgress"];
[topicProgressForUser setObject:[PFUser currentUser] forKey:#"user"];
[topicProgressForUser setObject:object forKey:#"topic"];
if ([object[#"fullAccess"] isEqualToString:#"Yes"]) {
[topicProgressForUser setObject:#"Free" forKey:#"purchased"];
} else {
[topicProgressForUser setObject:#"No" forKey:#"purchased"];
}
[topicProgressForUser setObject:0 forKey:#"questionsSolved"];
[topicProgressForUser setObject:0 forKey:#"attempts"];
[topicProgressForUser setObject:0 forKey:#"resultInPercentage"];
[topicProgressForUser setObject:#"Basic" forKey:#"achievement"];
[topicProgressForUser setObject:NO forKey:#"generateCertificate"];
[topicProgressForUser saveEventually];
}
}
}]; // topic block
}
}]; // signup block
}
}
I don't think I am using the right standard of saving data to parse cloud by saving each pfobject individually. What if the internet connection is lost in the middle of saving objects ? Can anyone help me in using the correct and fast approach of saving multiple pfobject data to new table in parse cloud.

Answer 1

In your case, I would take a look at the class methods saveAll, saveAllInBackground, etc.
I took your code and modified it how I think makes the most sense in this case. Let me know if it works:
- (IBAction)signUpFunction {
[self.view endEditing:YES];
NSString *fullName = self.nameTextField.text;
NSString *username = self.usernameTextField.text;
NSString *password = self.passwordTextField.text;
NSString *email = self.emailTextField.text;
if ([username length] == 0 || [password length] == 0 || [email length] == 0 || [fullName length] == 0) {
[[[UIAlertView alloc] initWithTitle:#"Missing Information"
message:#"Make sure you fill out all of the information!"
delegate:nil
cancelButtonTitle:#"ok"
otherButtonTitles:nil] show];
} else {
PFUser *newUser = [PFUser user];
newUser.username = username;
newUser.password = password;
newUser.email = email;
newUser[#"fullName"] = fullName;
[newUser signUpInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
if (error) {
[[[UIAlertView alloc] initWithTitle:#"Error!"message:[error.userInfo objectForKey:#"error"] delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil] show ];
} else {
PFQuery *topicsQuery = [PFQuery queryWithClassName:#"Topic"];
[topicsQuery findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (error != nil) {
NSLog(#"Error: %# %#", error, [error userInfo]);
} else {
NSMutableArray *topics = [NSMutableArray array];
for (unsigned int i = 0; i < objects.count; i++) {
PFObject *object = objects[i];
PFObject *topicProgressForUser = [PFObject objectWithClassName:#"QuizProgress"];
[topics addObject:topicProgressForUser];
topicProgressForUser[#"user"] = [PFUser currentUser];
topicProgressForUser[#"topic"] = object;
topicProgressForUser[#"questionSolved"] = #(NO);
topicProgressForUser[#"attempts"] = #(0);
topicProgressForUser[#"resultInPercentage"] = #(0);
topicProgressForUser[#"achievement"] = #"Basic";
topicProgressForUser[#"generateCertificate"] = #(NO);
if ([object[#"fullAccess"] isEqualToString:#"Yes"]) {
topicProgressForUser[#"purchased"] = #"Free";
} else {
topicProgressForUser[#"purchased"] = #"No";
}
}
[PFObject saveAllInBackground:objects block:^(BOOL succeeded, NSError *error) {
if (error != nil) {
// Do something here to handle the error
} else {
//
}
}
]; // saveAllInBackground
}
}]; // topic block
}
}]; // signup block
}
}

Answer 2

Change the below line of code:
[topicProgressForUser saveEventually];
to
[topicProgressForUser saveInBackground];
Hope this helps..