Can't copy sqlite database from app's mainbundle to users documents

Question

I can't copy my sqlite database to the users documents folder, the database has always 0 byte but should have 322 kb.

I have also checked that the database is included in the target membership.

The Problem is that i can't copy the database correctly.

Here is my code:

-(void)initDatabase
{
// Create a string containing the full path to the sqlite.db inside the documents folder
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *databasePath = [documentsDirectory stringByAppendingPathComponent:@"wine.sqlite"];

// Check to see if the database file already exists
bool databaseAlreadyExists = [[NSFileManager defaultManager] fileExistsAtPath:databasePath];

// Open the database and store the handle as a data member
if (sqlite3_open([databasePath UTF8String], &databaseHandle) == SQLITE_OK)
{

    // Create the database if it doesn't yet exists in the file system
    if (!databaseAlreadyExists)
    {
        // Get the path to the database in the application package
        NSString *databasePathFromApp = [[NSBundle mainBundle] pathForResource:@"wine" ofType:@"sqlite"];
        //NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"wine.sqlite"];

        // Copy the database from the package to the users filesystem
        [[NSFileManager defaultManager] copyItemAtPath:databasePathFromApp toPath:databasePath error:nil];

        NSLog(@"Database created");
    }
}

}

Answer 1

There is a logic error, you check for databaseAlreadyExists inside the

if (sqlite3_open([databasePath UTF8String], &databaseHandle) == SQLITE_OK) { ... }

block.

What you probably meant is

// Check to see if the database file already exists
bool databaseAlreadyExists = [[NSFileManager defaultManager] fileExistsAtPath:databasePath];

// Create the database if it doesn't yet exists in the file system
if (!databaseAlreadyExists)
{
    // Get the path to the database in the application package
    NSString *databasePathFromApp = [[NSBundle mainBundle] pathForResource:@"wine" ofType:@"sqlite"];

    // Copy the database from the package to the users filesystem
    [[NSFileManager defaultManager] copyItemAtPath:databasePathFromApp toPath:databasePath error:nil];

    NSLog(@"Database created");
}

// Open the database and store the handle as a data member
if (sqlite3_open([databasePath UTF8String], &databaseHandle) == SQLITE_OK)
{
   ...
}