fix: make class part of base_classes

src/backend/langflow/utils/util.py

@@ -158,17 +158,23 @@ def get_base_classes(cls):
     """Get the base classes of a class.
     These are used to determine the output of the nodes.
     """
-    bases = cls.__bases__
-    if not bases:
-        return []
-    else:
+    if bases := cls.__bases__:
         result = []
         for base in bases:
             if any(type in base.__module__ for type in ["pydantic", "abc"]):
                 continue
             result.append(base.__name__)
-            result.extend(get_base_classes(base))
-        return result
+            base_classes = get_base_classes(base)
+            # check if the base_classes are in the result
+            # if not, add them
+            for base_class in base_classes:
+                if base_class not in result:
+                    result.append(base_class)
+    else:
+        result = [cls.__name__]
+    if not result:
+        result = [cls.__name__]
+    return list(set(result))
 
 
 def get_default_factory(module: str, function: str):