🐛 fix(utils.py): move merge_nested_dicts function to the top of the file for better organization

✨ feat(utils.py): add merge_nested_dicts function to merge nested dictionaries recursively
🐛 fix(endpoints.py): import merge_nested_dicts function from the correct module
✨ feat(endpoints.py): use merge_nested_dicts function to merge dictionaries in build_langchain_custom_component_list_from_path function
🐛 fix(types.py): import merge_nested_dicts function from the correct module
✨ feat(types.py): use merge_nested_dicts function to merge dictionaries in build_langchain_custom_component_list_from_path function
🐛 fix(types.py): import merge_nested_dicts function from the correct module
✨ feat(types.py): use merge_nested_dicts function to merge valid and invalid menus in build_langchain_custom_component_list_from_path function
🐛 fix(tools.py): import Optional from typing module
✨ feat(tools.py): add CustomComponentEmptyNode class to represent an empty custom component template

src/backend/langflow/api/utils.py

@@ -57,3 +57,12 @@ def build_input_keys_response(langchain_object, artifacts):
         input_keys_response["template"] = langchain_object.prompt.template
 
     return input_keys_response
+
+
+def merge_nested_dicts(dict1, dict2):
+    for key, value in dict2.items():
+        if isinstance(value, dict) and isinstance(dict1.get(key), dict):
+            dict1[key] = merge_nested_dicts(dict1[key], value)
+        else:
+            dict1[key] = value
+    return dict1

src/backend/langflow/api/v1/endpoints.py

@@ -21,6 +21,8 @@ from langflow.api.v1.schemas import (
     CustomComponentCode,
 )
 
+from langflow.api.utils import merge_nested_dicts
+
 from langflow.interface.types import (
     build_langchain_types_dict,
     build_langchain_template_custom_component,
@@ -34,16 +36,6 @@ from sqlmodel import Session
 router = APIRouter(tags=["Base"])
 
 
-# TODO: Move to correct local
-def merge_nested_dicts(dict1, dict2):
-    for key, value in dict2.items():
-        if isinstance(value, dict) and isinstance(dict1.get(key), dict):
-            dict1[key] = merge_nested_dicts(dict1[key], value)
-        else:
-            dict1[key] = value
-    return dict1
-
-
 @router.get("/all")
 def get_all():
     native_components = build_langchain_types_dict()

src/backend/langflow/interface/types.py

@@ -18,16 +18,21 @@ from langflow.interface.custom.base import custom_component_creator
 from langflow.interface.custom.custom_component import CustomComponent
 
 from langflow.template.field.base import TemplateField
-from langflow.template.frontend_node.tools import CustomComponentNode
+from langflow.template.frontend_node.tools import (
+    CustomComponentNode,
+    CustomComponentEmptyNode,
+)
 from langflow.interface.retrievers.base import retriever_creator
 
 from langflow.interface.custom.directory_reader import DirectoryReader
 from langflow.utils.logger import logger
+from langflow.utils.util import get_base_classes
+from langflow.api.utils import merge_nested_dicts
+
 import re
 import warnings
 import traceback
 from fastapi import HTTPException
-from langflow.utils.util import get_base_classes
 
 
 # Used to get the base_classes list
@@ -250,15 +255,14 @@ def build_langchain_custom_component_list_from_path(path: str):
 
     # Build and validate all files
     data = reader.build_component_menu_list(file_list)
-    valid_components = reader.filter_loaded_components(data, False)
 
-    # TODO: Handle those invalid components
+    valid_components = reader.filter_loaded_components(data=data, with_errors=False)
-    reader.filter_loaded_components(data, True)
+    invalid_components = reader.filter_loaded_components(data=data, with_errors=True)
 
-    menu = {}
+    valid_menu = {}
     for menu_item in valid_components["menu"]:
         menu_name = menu_item["name"]
-        menu[menu_name] = {}
+        valid_menu[menu_name] = {}
 
         for component in menu_item["components"]:
             try:
@@ -271,8 +275,33 @@ def build_langchain_custom_component_list_from_path(path: str):
                     component_extractor
                 )
 
-                menu[menu_name][component_name] = component_template
+                valid_menu[menu_name][component_name] = component_template
             except Exception as exc:
                 logger.error(f"Error while building custom component: {exc}")
 
-    return menu
+    invalid_menu = {}
+    for menu_item in invalid_components["menu"]:
+        menu_name = menu_item["name"]
+        invalid_menu[menu_name] = {}
+
+        for component in menu_item["components"]:
+            try:
+                component_name = component["name"]
+                component_code = component["code"]
+
+                component_template = (
+                    CustomComponentNode(
+                        description="ERROR - Check your Python Code",
+                        display_name=f"ERROR - {component_name}",
+                    )
+                    .to_dict()
+                    .get(type(CustomComponent()).__name__)
+                )
+
+                component_template.get("template").get("code")["value"] = component_code
+
+                invalid_menu[menu_name][component_name] = component_template
+            except Exception as exc:
+                logger.error(f"Error while creating custom component: {exc}")
+
+    return merge_nested_dicts(valid_menu, invalid_menu)

src/backend/langflow/template/frontend_node/tools.py

@@ -5,6 +5,7 @@ from langflow.template.template.base import Template
 from langflow.utils.constants import (
     DEFAULT_PYTHON_FUNCTION,
 )
+from typing import Optional
 
 
 class ToolNode(FrontendNode):
@@ -160,7 +161,32 @@ class CustomComponentNode(FrontendNode):
             )
         ],
     )
-    description: str = "Python Class to be executed."
+    description: str = "Dynamic Python code to be executed."
+    base_classes: list[str] = []
+
+    def to_dict(self):
+        return super().to_dict()
+
+
+class CustomComponentEmptyNode(FrontendNode):
+    name: str = "CustomComponent"
+    template: Template = Template(
+        type_name="CustomComponent",
+        fields=[
+            TemplateField(
+                field_type="code",
+                required=True,
+                placeholder="",
+                is_list=False,
+                show=True,
+                value="",
+                name="code",
+                advanced=False,
+                dynamic=True,
+            )
+        ],
+    )
+    description: str = "Dynamic Python code to be executed."
     base_classes: list[str] = []
 
     def to_dict(self):