BlackBerry 10中的DataModel

Question

I want to store some data in database and get this data from it. But when I try to retrieve this data I am having some problem. I have done the following code to read records---

QSqlDatabase database = QSqlDatabase::database();
        QSqlQuery query(database);

        const QString sqlQuery = "SELECT senderName, msgReceive FROM messageReceive";

        if (query.exec(sqlQuery)) {

        const int senderNameField = query.record().indexOf("senderName");
        const int msgDataField = query.record().indexOf("msgReceive");


        int recordsRead = 0;
        while (query.next()) {

                    Person *person = new Person(query.value(senderNameField).toString(),query.value(msgDataField).toString()); //// LINE 1

                    m_dataModel->insert(person); ///// LINE 2

                    recordsRead++;
                }`

This code is executing well till line 1 , but at line 2 the application is exiting. I have created object of GroupDataModel in .hpp file and given include file also.

Please someone tell me whats the problem here ?

Thanks in advance.

Answer 1

Error SIGSEGV is generated on segmentation fault.

Therefore I believe m_dataModel is uninitialized.