editablesqlmodel.cpp Example File

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  #include <QtSql>

  #include "editablesqlmodel.h"

  EditableSqlModel::EditableSqlModel(QObject *parent)
      : QSqlQueryModel(parent)
  {
  }

  Qt::ItemFlags EditableSqlModel::flags(
          const QModelIndex &index) const
  {
      Qt::ItemFlags flags = QSqlQueryModel::flags(index);
      if (index.column() == 1 || index.column() == 2)
          flags |= Qt::ItemIsEditable;
      return flags;
  }

  bool EditableSqlModel::setData(const QModelIndex &index, const QVariant &value, int /* role */)
  {
      if (index.column() < 1 || index.column() > 2)
          return false;

      QModelIndex primaryKeyIndex = QSqlQueryModel::index(index.row(), 0);
      int id = data(primaryKeyIndex).toInt();

      clear();

      bool ok;
      if (index.column() == 1) {
          ok = setFirstName(id, value.toString());
      } else {
          ok = setLastName(id, value.toString());
      }
      refresh();
      return ok;
  }

  void EditableSqlModel::refresh()
  {
      setQuery("select * from person");
      setHeaderData(0, Qt::Horizontal, QObject::tr("ID"));
      setHeaderData(1, Qt::Horizontal, QObject::tr("First name"));
      setHeaderData(2, Qt::Horizontal, QObject::tr("Last name"));
  }

  bool EditableSqlModel::setFirstName(int personId, const QString &firstName)
  {
      QSqlQuery query;
      query.prepare("update person set firstname = ? where id = ?");
      query.addBindValue(firstName);
      query.addBindValue(personId);
      return query.exec();
  }

  bool EditableSqlModel::setLastName(int personId, const QString &lastName)
  {
      QSqlQuery query;
      query.prepare("update person set lastname = ? where id = ?");
      query.addBindValue(lastName);
      query.addBindValue(personId);
      return query.exec();
  }