SQL Error: Not an Error - ios

Question

More SQLite issues. So my interface is as follows (this is all in .m):
#interface Search()
#property (strong, nonatomic) NSString *databasePath; //path to sqlite database file
#property (strong, nonatomic) NSString *databaseName;
#property (nonatomic) sqlite3 *database;
#end
and the init follows:
- (id)init
{
if ((self = [super init]))
{
self.databaseName = DB_NAME;
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDir = [documentPaths objectAtIndex:0];
_databasePath = [documentsDir stringByAppendingPathComponent:self.databaseName];
[self checkAndCreateDatabase];
if (sqlite3_open_v2([self.databasePath UTF8String], &_database, SQLITE_OPEN_READWRITE, NULL) != SQLITE_OK)
{
[[[UIAlertView alloc]initWithTitle:#"Missing"
message:#"Database file not found"
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil, nil]show];
}
else
{
NSLog(#"%s: sqlite3_open_v2 error: %s", __FUNCTION__, sqlite3_errmsg(self.database));
}
}
The error that the Log in the init returns is: sqlite3_open_v2 error: not an error. In my searches, I've heard that SQLite doesn't return an error when it points to a non-existent database. But I'm not sure why the database wouldn't exist. The copy function I'm using (which I was given and had seemed to work before) is as follows:
-(void) checkAndCreateDatabase
{
// Check if the SQL database has already been saved to the users phone, if not then copy it over
BOOL dbExists;
// Create a FileManager object, we will use this to check the status
// of the database and to copy it over if required
NSFileManager *fileManager = [NSFileManager defaultManager];
// Check if the database has already been created in the users filesystem
dbExists = [fileManager fileExistsAtPath:_databasePath];
// If the database already exists then return without doing anything
if(dbExists)
{
return;
}
// If not then proceed to copy the database from the application to the users filesystem
// Get the path to the database in the application package
NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:_databaseName];
// Copy the database from the package to the users filesystem
//[fileManager copyItemAtPath:databasePathFromApp toPath:_databasePath error:nil];
NSError *error = nil;
if (![fileManager copyItemAtPath:databasePathFromApp toPath:_databasePath error:&error])
{
NSLog(#"%s: copyItemAtPathError: %#", __FUNCTION__, error);
}
}
Finally, I have verified in the iOS Simulator Documents directory that the database exists, and the query I'm trying to execute on it works. Why might I be getting this error?

Answer 1

Having never worked with SQLLite like this, I only want to mention, that in the code above, your else statement gets called, when sqlite_open_v2 == SQL_OK. So maybe in that case, there is just no error to return and everything is fine?!

Answer 2

It turns out the problem was a very simple one. The object I was trying to assign the values to (and then pull them from) was not initialized. It was a very silly oversight on my part, but I'm still new to Objective C.
Additionally, I do recommend icodebuster's suggestions to use FMDB for SQLite in iOS. It cleaned up some of my SQLite mess and made it a lot nicer to use.