Throw more informative exception if graph DB metadata doesn't exist

funkelab · Mar 8, 2024 · b639b42 · b639b42
1 parent 2896331
commit b639b42
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/funlib/persistence/graphs/sql_graph_database.py b/funlib/persistence/graphs/sql_graph_database.py
@@ -97,6 +97,8 @@ def __init__(
             self.ndims = None  # to be read from metadata
 
             metadata = self._read_metadata()
+            if metadata is None:
+                RuntimeError("metadata does not exist, can't open in read mode")
             self.__load_metadata(metadata)
 
         if mode in self.create_modes: