Migrate CablePath to use two-dimensional array

netbox/dcim/utils.py

@@ -29,6 +29,16 @@ def path_node_to_object(repr):
     return ct.model_class().objects.get(pk=object_id)
 
 
+def flatten_path(path):
+    """
+    Flatten a two-dimensional array (list of lists) into a flat list.
+    """
+    ret = []
+    for step in path:
+        ret.extend(step)
+    return ret
+
+
 def create_cablepath(node):
     """
     Create CablePaths for all paths originating from the specified node.