sqleventmodel.cpp Example File

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  #include "sqleventmodel.h"

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

  SqlEventModel::SqlEventModel()
  {
      createConnection();
  }

  QList<QObject*> SqlEventModel::eventsForDate(const QDate &date)
  {
      const QString queryStr = QString::fromLatin1("SELECT * FROM Event WHERE '%1' >= startDate AND '%1' <= endDate").arg(date.toString("yyyy-MM-dd"));
      QSqlQuery query(queryStr);
      if (!query.exec())
          qFatal("Query failed");

      QList<QObject*> events;
      while (query.next()) {
          Event *event = new Event(this);
          event->setName(query.value("name").toString());

          QDateTime startDate;
          startDate.setDate(query.value("startDate").toDate());
          startDate.setTime(QTime(0, 0).addSecs(query.value("startTime").toInt()));
          event->setStartDate(startDate);

          QDateTime endDate;
          endDate.setDate(query.value("endDate").toDate());
          endDate.setTime(QTime(0, 0).addSecs(query.value("endTime").toInt()));
          event->setEndDate(endDate);

          events.append(event);
      }

      return events;
  }

  /*
      Defines a helper function to open a connection to an
      in-memory SQLITE database and to create a test table.
  */
  void SqlEventModel::createConnection()
  {
      QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
      db.setDatabaseName(":memory:");
      if (!db.open()) {
          qFatal("Cannot open database");
          return;
      }

      QSqlQuery query;
      // We store the time as seconds because it's easier to query.
      query.exec("create table Event (name TEXT, startDate DATE, startTime INT, endDate DATE, endTime INT)");
      query.exec("insert into Event values('Grocery shopping', '2014-01-01', 36000, '2014-01-01', 39600)");
      query.exec("insert into Event values('Ice skating', '2014-01-01', 57600, '2014-01-01', 61200)");
      query.exec("insert into Event values('Doctor''s appointment', '2014-01-15', 57600, '2014-01-15', 63000)");
      query.exec("insert into Event values('Conference', '2014-01-24', 32400, '2014-01-28', 61200)");

      return;
  }