Question

I have a function in an iOS app which reads in some data from a database. The function is extremely simple:

-(void) readCategories {
    sqlite3 *database;

    if([[NSFileManager defaultManager] fileExistsAtPath:databasePath]){
        if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK) {
            const char *sqlStatement = "SELECT * FROM Categories ORDER BY name COLLATE NOCASE ASC";
            sqlite3_stmt *compiledStatement;
            int errorCode = sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL);

            if(errorCode == SQLITE_OK) {
                while(sqlite3_step(compiledStatement) == SQLITE_ROW) {
                    [categories addObject:[NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 1)]];
                }
            } else {
                 NSLog(@"Error reading categories. Code: %d, message: '%s'", errorCode,sqlite3_errmsg(database));
            }
            sqlite3_finalize(compiledStatement);
            sqlite3_close(database);
        } else {
            NSLog(@"Error opening DB");
        }
    } else {
        NSLog(@"DB does not exist.");
    }
}

The problem is that the errorCode is always SQLITE_ERROR which according to the documentation is: “SQL error or missing database”. The message given is: ‘no such table: Categories’

Now, if I look at the database file on my computer, the table is clearly there. I can also run exactly the same query on it and it works correctly.

Does anyone have any ideas on what is going wrong?

Thanks.

Answer 1

So the bug was that it wasn’t copying over the database file. I still have no idea why it wasn’t. I fortunately have the luxury of being able to create the database file programatically. Doing that solved the problem. Not sure why the file wouldn’t copy however.