Hello,

Consider the following main.qml code, which works perfectly:

Qt Code: 
  1. import QtQuick 2.4
  2. import QtQuick.Controls 1.3
  3. import QtQuick.Window 2.2
  4.  
  5. ApplicationWindow {
  6.     title: qsTr("Hello Middle-Earth")
  7.     width: 640
  8.     height: 480
  9.     visible: true
  10.  
  11.     VisualDataModel {
  12.         id: fellowship
  13.  
  14.         model: ListModel {
  15.             ListElement {
  16.                 name: "Aragorn"
  17.                 desc: "Ranger"
  18.             }
  19.             ListElement {
  20.                 name: "Frodo"
  21.                 desc: "Ring-bearer"
  22.             }
  23.             ListElement {
  24.                 name: "Gandalf"
  25.                 desc: "Wizard"
  26.             }
  27.         }
  28.         delegate: Text {
  29.             width: ListView.width
  30.             text: name + " - " + desc
  31.         }
  32.     }
  33.  
  34.     ListView {
  35.         model: fellowship
  36.         anchors.fill: parent
  37.     }
  38. }
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Now consider the following, custom VisualDataModel type, MyVisualDataModel.qml:

Qt Code: 
  1. import QtQuick 2.4
  2.  
  3. VisualDataModel {
  4.  
  5.     property Component innerDelegate: null
  6.  
  7.     delegate: Loader {
  8.         id: loader
  9.  
  10.         sourceComponent: innerDelegate
  11.     }
  12. }
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Here is how I want to use that type in main:

Qt Code: 
  1. MyVisualDataModel {
  2.         id: fellowship
  3.  
  4.         model: ListModel {
  5.             ListElement {
  6.                 name: "Aragorn"
  7.                 desc: "Ranger"
  8.             }
  9.             ListElement {
  10.                 name: "Frodo"
  11.                 desc: "Ring-bearer"
  12.             }
  13.             ListElement {
  14.                 name: "Gandalf"
  15.                 desc: "Wizard"
  16.             }
  17.         }
  18.         innerDelegate: Text {
  19.             width: ListView.width
  20.             text: name + " - " + desc
  21.         }
  22.     }
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And here is what happens:

qrc:/main.qml:30: ReferenceError: name is not defined
qrc:/main.qml:30: ReferenceError: name is not defined
qrc:/main.qml:30: ReferenceError: name is not defined

How do I access model data in a Loader?

Update: plugging my question into Google before pressing submit here led me to this question on Stack Overflow. It appears to work perfectly; see below.

in main.qml:
Qt Code: 
  1. innerDelegate: Text {
  2.             width: ListView.width
  3.             text: modelData.name + " - " + modelData.desc
  4.         }
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in MyVisualDataModel.qml:
Qt Code: 
  1. delegate: Loader {
  2.         id: loader
  3.  
  4.         property variant modelData: model
  5.  
  6.         sourceComponent: innerDelegate
  7.     }
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Posting for posterity.