how to add model to different model-delegate

[stevocz]

Hi.
i have ListView with model in main.qml where is loaded second qml with data. But when i want data from second model they still looking into first model (groupModel) in main.qml. How to get data from itemModel?
model is in c++. it finish with ReferenceError: datafromItemModelis not defined becouse datafromItemModel is defined in itemModel and he still looking into groupModel

here is little example:

main.qml

ListView {
        id: listView
        anchors.fill: parent
        model: groupModel
 
        delegate: Loader {
            source: fileName // fileName from groupModel data
        }
    }

ListView {
        id: listView
        anchors.fill: parent
        model: groupModel

        delegate: Loader {
            source: fileName // fileName from groupModel data
        }
    }

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item.qml

GridView {
    model: itemModel
 
    delegate: Rectangle {
                Text {
                      text: datafromItemModel
                }
    }
}

GridView {
    model: itemModel

    delegate: Rectangle {
                Text {
                      text: datafromItemModel
                }
    }
}

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c++ code

QVariant MainModel::data(const QModelIndex & index, int role) const
{
const ItemModel * itemModel= mainDatas.at(index.row());
switch (role)
    {
    case fileNameRole:
        return QString("item.qml");
    case itemModelRole:{
        return itemModel;
    }
    default:
        return QVariant();
    }
}

QVariant MainModel::data(const QModelIndex & index, int role) const
{
const ItemModel * itemModel= mainDatas.at(index.row());
switch (role)
    {
    case fileNameRole:
        return QString("item.qml");
    case itemModelRole:{
        return itemModel;
    }
    default:
        return QVariant();
    }
}

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