sqlcontactmodel.cpp Example File

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  #include "sqlcontactmodel.h"

  #include <QDebug>
  #include <QSqlError>
  #include <QSqlQuery>

  static void createTable()
  {
      if (QSqlDatabase::database().tables().contains(QStringLiteral("Contacts"))) {
          // The table already exists; we don't need to do anything.
          return;
      }

      QSqlQuery query;
      if (!query.exec(
          "CREATE TABLE IF NOT EXISTS 'Contacts' ("
          "   'name' TEXT NOT NULL,"
          "   PRIMARY KEY(name)"
          ")")) {
          qFatal("Failed to query database: %s", qPrintable(query.lastError().text()));
      }

      query.exec("INSERT INTO Contacts VALUES('Albert Einstein')");
      query.exec("INSERT INTO Contacts VALUES('Ernest Hemingway')");
      query.exec("INSERT INTO Contacts VALUES('Hans Gude')");
  }

  SqlContactModel::SqlContactModel(QObject *parent) :
      QSqlQueryModel(parent)
  {
      createTable();

      QSqlQuery query;
      if (!query.exec("SELECT * FROM Contacts"))
          qFatal("Contacts SELECT query failed: %s", qPrintable(query.lastError().text()));

      setQuery(query);
      if (lastError().isValid())
          qFatal("Cannot set query on SqlContactModel: %s", qPrintable(lastError().text()));
  }