chore(base.py): add type ignore comment to clear_cache function

fix(base.py): raise ValueError if content is None in save_binary_file function
feat(nodes.py): add memory field to TimeTravelGuideChainNode
test(test_chains_template.py): add test for memory field in TimeTravelGuideChainNode

src/backend/langflow/cache/base.py

@@ -47,7 +47,7 @@ def memoize_dict(maxsize=128):
         def clear_cache():
             cache.clear()
 
-        wrapper.clear_cache = clear_cache
+        wrapper.clear_cache = clear_cache  # type: ignore
         return wrapper
 
     return decorator
@@ -119,7 +119,8 @@ def save_binary_file(content: str, file_name: str, accepted_types: list[str]) ->
 
     # Get the destination folder
     cache_path = Path(tempfile.gettempdir()) / PREFIX
-
+    if content is None:
+        raise ValueError("Please, reload the file in the loader.")
     data = content.split(",")[1]
     decoded_bytes = base64.b64decode(data)
 

src/backend/langflow/template/nodes.py

@@ -150,6 +150,13 @@ class TimeTravelGuideChainNode(FrontendNode):
                 multiline=False,
                 name="llm",
             ),
+            TemplateField(
+                field_type="BaseChatMemory",
+                required=False,
+                show=True,
+                name="memory",
+                advanced=False,
+            ),
         ],
     )
     description: str = "Time travel guide chain to be used in the flow."

tests/test_chains_template.py

@@ -435,5 +435,16 @@ def test_time_travel_guide_chain(client: TestClient):
         "list": False,
         "advanced": False,
     }
+    assert template["memory"] == {
+        "required": False,
+        "placeholder": "",
+        "show": True,
+        "multiline": False,
+        "password": False,
+        "name": "memory",
+        "type": "BaseChatMemory",
+        "list": False,
+        "advanced": False,
+    }
 
     assert chain["description"] == "Time travel guide chain to be used in the flow."