Maya: check for invalid reference compatible with Maya 2022

server_addon/maya/client/ayon_maya/api/lib.py

@@ -1721,7 +1721,7 @@ def is_valid_reference_node(reference_node):
  Reference node 'reference_node' is not associated with a reference file.
 
  Note that this does *not* check whether the reference node points to an
- existing file. Instead it only returns whether maya considers it valid
+ existing file. Instead, it only returns whether maya considers it valid
  and thus is not an unassociated reference node
 
  Arguments:
@@ -1731,9 +1731,18 @@ def is_valid_reference_node(reference_node):
  bool: Whether reference node is a valid reference
 
  """
+ # maya 2022 is missing `isValidReference` so the check needs to be
+ # done in different way.
+ if cmds.about(version=True) < 2023:
+ try:
+ cmds.referenceQuery(reference_node, filename=True)
+ return True
+ except RuntimeError:
+ return False
  sel = OpenMaya.MSelectionList()
  sel.add(reference_node)
  depend_node = sel.getDependNode(0)
+
  return OpenMaya.MFnReference(depend_node).isValidReference()