feat: Update selected_output_type handling in Vertex class

This commit updates the handling of the `selected_output_type` attribute in the `Vertex` class. Previously, the attribute was assigned directly from the `data` dictionary, which could result in unexpected behavior. Now, the attribute is properly stripped and converted to a string before assignment, ensuring consistent behavior. This change improves the reliability and accuracy of the `selected_output_type` attribute in the `Vertex` class.

src/backend/base/langflow/graph/vertex/base.py

@@ -201,7 +201,9 @@ class Vertex:
 
         self.description = self.data["node"].get("description", "")
         self.frozen = self.data["node"].get("frozen", False)
-        self.selected_output_type = self.data["node"].get("selected_output_type")
+        self.selected_output_type = (
+            str(self.data.get("selected_output_type")).strip() if self.data.get("selected_output_type") else None
+        )
         self.is_input = self.data["node"].get("is_input") or self.is_input
         self.is_output = self.data["node"].get("is_output") or self.is_output
         template_dicts = {key: value for key, value in self.data["node"]["template"].items() if isinstance(value, dict)}

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

@@ -2,7 +2,6 @@ import inspect
 import json
 from typing import TYPE_CHECKING, Any, Callable, Dict, Sequence, Type
 
-
 import orjson
 from langchain.agents import agent as agent_module
 from langchain.agents.agent import AgentExecutor

src/backend/base/langflow/utils/validate.py

@@ -253,6 +253,9 @@ def build_class_constructor(compiled_class, exec_globals, class_name):
                 globals()[module_name] = module
 
         instance = exec_globals[class_name](*args, **kwargs)
+        # Get selected type from global scope
+        if instance.selected_output_type in exec_globals:
+            instance.selected_output_type = exec_globals[instance.selected_output_type]
         return instance
 
     build_custom_class.__globals__.update(exec_globals)