contactmodel.h Example File

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  #ifndef CONTACTMODEL_H
  #define CONTACTMODEL_H

  #include <QAbstractListModel>

  class ContactModel : public QAbstractListModel
  {
      Q_OBJECT

  public:
      enum ContactRole {
          FullNameRole = Qt::DisplayRole,
          AddressRole = Qt::UserRole,
          CityRole,
          NumberRole
      };
      Q_ENUM(ContactRole)

      ContactModel(QObject *parent = nullptr);

      int rowCount(const QModelIndex & = QModelIndex()) const;
      QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
      QHash<int, QByteArray> roleNames() const;

      Q_INVOKABLE QVariantMap get(int row) const;
      Q_INVOKABLE void append(const QString &fullName, const QString &address, const QString  &city, const QString &number);
      Q_INVOKABLE void set(int row, const QString &fullName, const QString &address, const QString  &city, const QString &number);
      Q_INVOKABLE void remove(int row);

  private:
      struct Contact {
          QString fullName;
          QString address;
          QString city;
          QString number;
      };

      QList<Contact> m_contacts;
  };

  #endif // CONTACTMODEL_H