Fix: Allow missing node names in IDEA. (Redmine issue: #6497)

lib/mentat/idea/internal.py

@@ -261,7 +261,7 @@ class Idea(idea.lite.Idea):  # pylint: disable=locally-disabled,too-many-ancesto
         :return: Value of message attribute ``idea['Node']['Name']``.
         :rtype: list of strings
         """
-        return [node['Name'] for node in self.get('Node', [])]
+        return [name for name in (node.get('Name', None) for node in self.get('Node', [])) if name]
 
     def get_addresses(self, node, get_v4 = True, get_v6 = True):
         """

lib/mentat/idea/sqldb.py

@@ -176,6 +176,8 @@ class Idea:    # pylint: disable=locally-disabled,too-many-instance-attributes,t
 
         # Node (detector) name and types (tags).
         self.node_name = idea_event.get_detectors()
+        if not self.node_name:
+            raise KeyError("Missing Node name")
         self.node_type = idea_event.get_types('Node')
 
         # CESNET implementation specific metadata.