@jeremy_k
Thank You for the explanation!
As you said I had to implement the roleNames() Function and adjusted the data().
The code below now works
import sys
import typing
import PySide6
from PySide6 import QtCore
from PySide6 import QtGui
from PySide6.QtCore import QByteArray
class ProductListModel (QtCore.QAbstractListModel):
def __init__(self, products, parent = None):
super().__init__(parent)
self.products = products
def data(self, index, role):
"""Returns an appropriate value for the requested data.
If the view requests an invalid index, an invalid variant is returned.
Any valid index that corresponds to a string in the list causes that
string to be returned."""
row = index.row()
if not index.isValid() or row >= len(self.products):
return None
product = self.products[row]
if role == QtCore.Qt.DisplayRole:
return product.name
elif role == QtCore.Qt.EditRole:
return product.name
elif role == QtCore.Qt.UserRole + 1:
return product.id
elif role == QtCore.Qt.UserRole + 2:
return product.name
return None
def headerData(self, section, orientation, role=QtCore.Qt.DisplayRole):
"""Returns the appropriate header string depending on the orientation of
the header and the section. If anything other than the display role is
requested, we return an invalid variant."""
if role != QtCore.Qt.DisplayRole:
return None
if orientation == QtCore.Qt.Horizontal:
return f"Column {section}"
return f"Row {section}"
def rowCount(self, parent: typing.Union[PySide6.QtCore.QModelIndex, PySide6.QtCore.QPersistentModelIndex] = ...) -> int:
# return length of productList
return len(self.products)
def roleNames(self):
roles = {
QtCore.Qt.UserRole + 1: b'id',
QtCore.Qt.UserRole + 2: b'name',
}
return roles
class Product:
def __init__(self, id:int, name:str):
self.id = id
self.name = name```
