diff --git a/pillarsdk/nodes.py b/pillarsdk/nodes.py
index ba15852..2b654c7 100755
--- a/pillarsdk/nodes.py
+++ b/pillarsdk/nodes.py
@@ -78,6 +78,7 @@ class Node(List, Find, Create, Post, Update, Delete, Replace):
     @classmethod
     def create_asset_from_file(cls, project_id, parent_node_id, asset_type, filename,
                                always_create_new_node=False,
+                               extra_where=None,
                                api=None):
         """Uploads the file to the Cloud and creates an asset node.
 
@@ -91,6 +92,9 @@ class Node(List, Find, Create, Post, Update, Delete, Replace):
         :param filename: path of the file to upload. Must be readable.
         :param always_create_new_node: when True, a new node is always created,
             possibly with the same name & parent as an existing one.
+        :param extra_where: dict of properties to use, in addition to project, node_type
+            and name, to find any existing node. Use this to restrict the
+            nodes that may be re-used to attach this file to.
         :returns: the updated/created node
         :rtype: Node
         """
@@ -117,6 +121,9 @@ class Node(List, Find, Create, Post, Update, Delete, Replace):
 
         if not always_create_new_node:
             # Try to find an existing one to see if there is anything to update.
+            where = copy.deepcopy(basic_properties)
+            if extra_where:
+                where.update(extra_where)
             existing_node = cls.find_first({'where': basic_properties}, api=api)
             if existing_node:
                 # Just update the file ID and we're done.