Query a database - connection duplicated error.

I use the following to select data in my database:

QVariantList Database::queryDatabase(const QString query)
{
    QVariantList sqlData;
    SqlDataAccess sqlDataAccess(mDbNameWithPath);
    sqlData.clear();
    sqlData = sqlDataAccess.execute(query).value();

    if (sqlDataAccess.hasError()) {
        DataAccessError err = sqlDataAccess.error();
        qWarning() << "SQL error: type=" << err.errorType() << ": " << err.errorMessage();
        return sqlData;
    }
    return sqlData;
}

The problem is when I run the above method for the second time, I get the warning:

Warning: QSqlDatabasePrivate::addDatabase: duplicate connection name 'data/drums.db', old connection removed.

This is due to the line:

SqlDataAccess sqlDataAccess(mDbNameWithPath);

I was wondering how I could go about deleting the warning, I have no idea how create sqlDataAccess as a global var, maybe this would settle it.

If anyone can help then I would appreciate it.

Thank you

Thank you! Inherit QObject class:

(1) add #include

class DataBase : public QObject
{
  Q_OBJECT
public:
  Database();
  ...

This way you can use the parent-child of QObject mechanism to control the lifetime of the object.

It seems that forum has some formatting issues.

bb::data::SqlDataAccess

is bb [Colon] [Colon] data [Colon] [Colon] SqlDataAccess, right?

p. s.

It is not recommended to use "using namespace" in the .h files, it will pollute the namespace of each .cpp file that contains this header. It is better to use full qualified names in the .h files and move this line to the .cpp file:

using namespace bb::data;

Tags: BlackBerry Developers

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Moral of the story, google is your friend lol. Thanks for replying tho!

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