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editablesqlmodel.h Example File
sql/querymodel/editablesqlmodel.h

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 #ifndef EDITABLESQLMODEL_H
 #define EDITABLESQLMODEL_H

 #include <QSqlQueryModel>

 class EditableSqlModel : public QSqlQueryModel
 {
     Q_OBJECT

 public:
     EditableSqlModel(QObject *parent = 0);

     Qt::ItemFlags flags(const QModelIndex &index) const;
     bool setData(const QModelIndex &index, const QVariant &value, int role);

 private:
     bool setFirstName(int personId, const QString &firstName);
     bool setLastName(int personId, const QString &lastName);
     void refresh();
 };

 #endif