[SOLVED] QDomNode is always null

[Anticross]

I wrote some method which returns QDomNode :
@
private: QDomNode createNode(QStandardItem * item) {

if (item == NULL)
 return QDomNode();    

QDomNode node;
node.toElement().setTagName(item->text());

// write attributes
QStandardItem * parent = item->parent();

if (parent == NULL)
 parent = invisibleRootItem();

for (int i = 1; i < columnCount(); i++) {

 QStandardItem * columnItem = parent->child(item->row(), i);

 if (columnItem == NULL)
  continue;

 QString sValue = columnItem->text();

 if (sValue.isEmpty())
  continue;

 node.toElement().setAttribute(headerData(i,Qt::Horizontal,Qt::DisplayRole).toString(), sValue);     
}

int childCount = item->rowCount();

for (int i = 0; i < childCount; i++) {

 QDomNode childNode = createNode(item->child(i));

 if (childNode.isNull())
  continue;

 node.appendChild(childNode);
}

return node;

}
@
But it always returns a null node, no matter of arguments. What am I doing wrong ?

[raven-worx]

because you use lines like these:
@
node.toElement()...
@

You should create a QDomElement and do all your work directly on it instead a QDomNode and convert it every time.
Currently you only call your methods on on converted elements (from your intitial node) ... which get discarded right in the next line ...

[pkj__]

You are not creating a QDomNode using QDomDocument::createElement() or similar functions. Since the stack variable QDomNode node is null, toElement() also returns a null. Create a valid node element first using QDomDocument variable for which the node is to be created.
@ QDomDocument doc;
QDomElement elem = doc.createElement("element"); @
Pass the doc element or create a new one as required. Refer QDomDocument and QDomNode and QDomElement documentation

[Anticross]

Thanks, phj_. Now it works fine.