Merge branch 'form_io' of github.com:logspace-ai/langflow into form_io

src/backend/langflow/api/utils.py

@@ -30,6 +30,7 @@ def build_input_keys_response(langchain_object, artifacts):
     input_keys_response = {
         "input_keys": {key: "" for key in langchain_object.input_keys},
         "memory_keys": [],
+        "handle_keys": artifacts.get("handle_keys", []),
     }
 
     # Set the input keys values from artifacts

src/backend/langflow/interface/initialize/loading.py

@@ -142,6 +142,13 @@ def instantiate_prompt(node_type, class_object, params):
                         for item in variable
                     ]
                 )
+                # handle_keys will be a list but it does not exist yet
+                # so we need to create it
+                if "handle_keys" not in params:
+                    format_kwargs["handle_keys"] = []
+
+                # Add the handle_keys to the list
+                format_kwargs["handle_keys"].append(input_variable)
 
     return prompt, format_kwargs