SQLite insert statement does not insert the new data - objective-c

Question

SQLite insert statement does not insert the new data
i am using this code
- (void) addN: (number *) theN
{
const char *sql = "insert into table (valueN) Values(?)";
sqlite3_stmt *addStmt = nil;
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
NSString * docsDir = [paths objectAtIndex:0];
NSString * thePath = [docsDir stringByAppendingPathComponent: #"theDB.sqlite"];
sqlite3_open([thePath UTF8String], &database);
sqlite3_prepare_v2(database, sql, -1, &addStmt, NULL);
sqlite3_bind_int(addStmt, 1, theN.theNumber);
sqlite3_step(addStmt);
sqlite3_finalize(addStmt);
sqlite3_close(database);
}
and the method to insert the record is
- (IBAction) saveN: (id) sender
{
numbers *theNumbers = [[numbers alloc] init];
number *theNumber = [[number alloc] init];
theNumber.theNumber = newN;
[theNumbers addN:theNumber];
[theNumbers release];
[theNumber release];
}
the code is executed but no record is inserted in the DB.
can someone please point me where is the mistake - cause there obviously is a mistake :)

Answer 1

You're not checking the return values of any of the sqlite3 calls. There's a good chance one of them is failing.

Answer 2

this code seems to work:
- (void) addN: (number *) theN
{
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *thePath = [[[NSBundle mainBundle] resourcePath]
stringByAppendingPathComponent:#"theDB.sqlite"];
BOOL success = [fileManager fileExistsAtPath:thePath];
if (!success)
{
NSLog(#"Failed to find database file '%#'.", thePath);
}
if (!(sqlite3_open([thePath UTF8String], &database) == SQLITE_OK))
{
NSLog(#"An error opening database, normally handle error here.");
}
const char *sql = "insert into table (valueN) Values(?)";
sqlite3_stmt *addStmt = nil;
if (sqlite3_prepare_v2(database, sql, -1, &addStmt, NULL) != SQLITE_OK)
{
NSLog(#"Error, failed to prepare statement, normally handle error here.");
}
sqlite3_bind_int(addStmt, 1, theN.theNumber);
sqlite3_step(addStmt);
if(sqlite3_finalize(addStmt) != SQLITE_OK)
{
NSLog(#"Failed to finalize data statement, normally error handling here.");
}
if (sqlite3_close(database) != SQLITE_OK)
{
NSLog(#"Failed to close database, normally error handling here.");
}
}