Updating SQLITE query FMDB - Beginner - iphone

Question

I could read from my SQLITE DB, but unable to update it. I wonder if the database is writable.
When i copy the SQL to the SQL console the code gets executed successfully. So there's no problem with the SQL.
-(BOOL) updateScores{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:#"uniques.sqlite"];
FMDatabase* db = [FMDatabase databaseWithPath:writableDBPath];
BOOL success;
if ([db open]) {
if ([db hadError]) {
NSLog(#"DB Error %d: %#", [db lastErrorCode], [db lastErrorMessage]);
}
success = [db executeUpdate:[NSString stringWithFormat:#"UPDATE Score SET answer='11' WHERE name LIKE 'jack'"]];
if (success) {
NSLog(#"OK");
}else {
NSLog(#"FAIL");
}
[db close];
}else {
NSLog(#"Problem with DB");
}
return success;
}

Answer 1

Always pass the arguments to SQL query as an object type, please look at the way arguments are passed to the SQL query. Even if you are passing a number, pass it as
[NSNumber numberWithInt:someValue]
Try this:
-(BOOL) updateScores
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:#"uniques.sqlite"];
FMDatabase* db = [FMDatabase databaseWithPath:writableDBPath];
BOOL success = NO;
if ([db open] != YES) {
NSLog(#"DB Error %d: %#", [db lastErrorCode], [db lastErrorMessage]);
return NO; //VERY IMPORTANT
}
[db beginTransaction];
success = [db executeUpdate:#"UPDATE scores SET answer = ? WHERE name like ?", #"1", #"jack"];
if (success) {
NSLog(#"OK");
[db commit];
[db close];
}else {
NSLog(#"FAIL");
}
return success;
}