QSqlQueryModel insertColumn() returns false

[norobro]

From QSqlQueryModel::insertColumns():

The parent parameter must always be an invalid QModelIndex, since the model does not support parent-child relationships.

EDIT: Commented without trying your code. Looks like testIndex.parent() does return an invalid QModelIndex. Try:

atsFieldModel->insertColumn(2)

atsFieldModel->insertColumn(2)

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Both work for me.