Not able to override delegate model, index

[Ash V]

@Axel-Spoerl, @JonB, @Christian-Ehrlicher
Hi there!

I have two files in my simple project, main.qml, and Delegate.qml:

// main.qml

import QtQuick
import content

App {
    height: 750
    width: 375
    visible: true

    ListView {
        id: lv

        anchors.fill: parent
        model: ListModel {
            ListElement {
                name: "Hebrew"
                type: "language"
            }
            ListElement {
                name: "Aramaic"
                type: "language"
            }
        }
        delegate: Delegate {}
    }
}

// Delegate.qml

import QtQuick

Rectangle {
    id: del

    height: 50
    width: 250

    property var model: ({})
    property int index: -1

    Text {
        text: {
            index + ", " + model.name + ", " + model.type
        }
    }
}

The output I'm getting is this:

However, when I changed my Delegate.qml as follows:

// Delegate.qml

import QtQuick

Rectangle {
    id: del

    height: 50
    width: 250

    required property var model
    required property var index

    Text {
        text: {
            index + ", " + model.name + ", " + model.type
        }
    }
}

or even to this:

import QtQuick

Rectangle {
    id: del

    height: 50
    width: 250

    Text {
        text: {
            index + ", " + model.name + ", " + model.type
        }
    }
}

I get the desired result:

Could you please explain to me why the model and index properties are not being overridden in the delegate?

Is there a way to override them, as I intend to do it here? Please explain.

[Axel Spoerl]

@Ash-V
Maybe I get this wrong, but in the first version, the properties are actually overridden. You can see that at the index being -1.
In the second version, bindings are created and you see the desired output. So in my view, all version behave exactly as expected.

[Ash V]

@Axel-Spoerl
Hi Axel!

What you've said doesn't seem quite correct, as when I initialized the property index with -5, I got -5 in my output.

// Delegate.qml

import QtQuick

Rectangle {
    id: del

    height: 50
    width: 250

    property var model: ({})
    property int index: -5

    Text {
        text: {
            index + ", " + model.name + ", " + model.type
        }
    }
}

This simply means that the model and index properties are not being overridden, isn't it?

Ping @JonB, @Christian-Ehrlicher

[JonB]

@Ash-V
Please don't "ping" people or address them in questions. We all see new questions, and we answer what we can. For my part I have never used QML so I'm hardly going to know about this issue.

[Axel Spoerl]

@Ash-V
Hi,
index is set to -5, model is set to {}, which means it's an empty, default constructed model.
Regardless if overridden or not, modelneither has a name, nor a typeproperty.
So I don't quite see the problem here.
Which value would you expect the properties to have?