Question

I have an sqlite database called ‘ProductDatabase.sql’, which I have copied into my applications project directory:

/Users/jacknutkins/Documents/TabbedDietApp/TabbedDietApp/ProductDatabase.sql

In the applications app delegate class I have this piece of code:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    //Set-up some globals
    m_DatabaseName = @"ProductDatabase.sql";

    //Get the path to the documents directory and append the databaseName
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    m_DatabasePath = [documentsDirectory stringByAppendingPathComponent:@"ProductDatabase.sql"];

    //Execute the "checkAndCreateDatabase" function
    [self checkAndCreateDatabase];

    //Query the databse for all animal records and construct the "animals" array
    [self readProductsFromDatabase];

....

At this point:

m_DatabasePath = ‘/Users/jacknutkins/Library/Application Support/iPhone Simulator/5.0/Applications/6D5BBE3A-BC9A-4C44-B089-FABA27CFFF4B/Library/ProductDatabase.sql’

Here is the code for the other 2 methods:

- (void) checkAndCreateDatabase {
    NSError * error;

    //Check if the database has been saved to the users phone, if not then copy it over
    BOOL l_Success;

    //Create a file manager object, we will use this to check the status
    //of the databse and to copy it over if required
    NSFileManager *l_FileManager = [NSFileManager defaultManager];

    //Check if the database has already been created in the users filesystem
    l_Success = [l_FileManager fileExistsAtPath:m_DatabasePath];

    //If the database already exists then return without doing anything

    if(l_Success)
        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 *l_DatabasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:m_DatabaseName];

    //Copy the database from the package to the usrrs filesystem
    [l_FileManager copyItemAtPath:l_DatabasePathFromApp toPath:m_DatabasePath error:&error];

}

If I perform some NSLogs here:

l_DatabasePathFromApp = /Users/jacknutkins/Library/Application Support/iPhone Simulator/5.0/Applications/6D5BBE3A-BC9A-4C44-B089-FABA27CFFF4B/TabbedDietApp.app/ProductDatabase.sql

and:

error = Error Domain=NSCocoaErrorDomain Code=260 “The operation couldn’t be completed. (Cocoa error 260.)” UserInfo=0x6b6d060 {NSFilePath=/Users/jacknutkins/Library/Application Support/iPhone Simulator/5.0/Applications/6D5BBE3A-BC9A-4C44-B089-FABA27CFFF4B/TabbedDietApp.app/ProductDatabase.sql, NSUnderlyingError=0x6b6cfa0 “The operation couldn’t be completed. No such file or directory”}

I’m not sure what file it is it can’t find here..

- (void) readProductsFromDatabase {
    //Init the products array
    m_Products = [[NSMutableArray alloc] init];
    NSLog(@"%@", m_DatabasePath);
    //Open the database from the users filessystem
    if(sqlite3_open([m_DatabasePath UTF8String], &database) == SQLITE_OK) {
        //Set-up the SQL statement and compile it for faster access
        const char *sqlStatement = "select * from products";
        sqlite3_stmt *compiledStatement;

        if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK)
        {
            NSLog(@"Success..");
            //Loop through the results and add them to the feeds array
            while(sqlite3_step(compiledStatement) == SQLITE_ROW) {
                //Read the data from the results row
                NSString *aName = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 1)];
                NSString *aCategory = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 2)];
                NSString *aCalories = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 3)];
                NSString *aFat = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 4)];
                NSString *aSaturates = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 5)];
                NSString *aSugar = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 6)];
                NSString *aFibre = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 7)];
                NSString *aSalt = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 8)];
                NSString *aImageURL = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 9)];
                NSLog(@"Delegate");
                NSString *aNote = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 10)];
                NSUInteger myInt = sqlite3_column_int(compiledStatement, 11);
                NSString *aServes = [NSString stringWithFormat:@"%d", myInt];

                //Create a new animal object with the data from the database
                Product *l_Product = [[Product alloc] initWithName:aName category:aCategory calories:aCalories fat:aFat saturates:aSaturates sugar:aSugar fibre:aFibre salt:aSalt imageURL:aImageURL note:aNote serves:aServes];

                //Add the animal object to the animals array
                [m_Products addObject:l_Product];

            }
        }
        //Release the compiled statement from memory
        sqlite3_finalize(compiledStatement);

    }
    sqlite3_close(database);

}

database is declared in the .h file as follows:

//Setup the database object
    sqlite3 *database;

In the above method, the line:

if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK)

does not evaluate to SQLITE_OK, because the database I try to copy to the documents directory is blank.

I have tried cleaning and building, deleting the blank copy of the database and re-running etc but it continues to copy a blank database every time.

I’ve googled this several times and I’ve tried everything I can find with no success..

Any help would be hugely appreciated.

Jack

EDIT

If I perform ‘select * from products’ from the terminal window on the database in the project directory I return the expected results.

Answer 1

I had forgotten to include the database file in the target membership by clicking on the check box in the file inspector tab.