Merge branch 'release' into fix_memory_on_agents

src/backend/langflow/graph/utils.py

@@ -3,6 +3,10 @@ from typing import Any, Union
 from langflow.interface.utils import extract_input_variables_from_prompt
 
 
+class UnbuiltObject:
+    pass
+
+
 def validate_prompt(prompt: str):
     """Validate prompt."""
     if extract_input_variables_from_prompt(prompt):

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

@@ -1,4 +1,5 @@
 import ast
+from langflow.graph.utils import UnbuiltObject
 from langflow.interface.initialize import loading
 from langflow.interface.listing import ALL_TYPES_DICT
 from langflow.utils.constants import DIRECT_TYPES
@@ -22,7 +23,7 @@ class Vertex:
         self.edges: List["Edge"] = []
         self.base_type: Optional[str] = base_type
         self._parse_data()
-        self._built_object = None
+        self._built_object = UnbuiltObject()
         self._built = False
         self.artifacts: Dict[str, Any] = {}
 
@@ -245,8 +246,14 @@ class Vertex:
         """
         Checks if the built object is None and raises a ValueError if so.
         """
-        if self._built_object is None:
-            raise ValueError(f"Node type {self.vertex_type} not found")
+        if isinstance(self._built_object, UnbuiltObject):
+            raise ValueError(f"{self.vertex_type}: {self._built_object_repr()}")
+        elif self._built_object is None:
+            message = f"{self.vertex_type} returned None."
+            if self.base_type == "custom_components":
+                message += " Make sure your build method returns a component."
+
+            raise ValueError(message)
 
     def build(self, force: bool = False) -> Any:
         if not self._built or force:

src/backend/langflow/interface/custom/constants.py

@@ -10,9 +10,11 @@ from langchain.vectorstores.base import VectorStore
 from langchain.schema import BaseOutputParser
 from langchain.schema.memory import BaseMemory
 from langchain.memory.chat_memory import BaseChatMemory
+from langchain.agents.agent import AgentExecutor
 
 LANGCHAIN_BASE_TYPES = {
     "Chain": Chain,
+    "AgentExecutor": AgentExecutor,
     "Tool": Tool,
     "BaseLLM": BaseLLM,
     "PromptTemplate": PromptTemplate,

src/backend/langflow/interface/custom/custom_component.py

@@ -49,7 +49,9 @@ class CustomComponent(Component, extra=Extra.allow):
         reader = DirectoryReader("", False)
 
         for type_hint in TYPE_HINT_LIST:
-            if reader.is_type_hint_used_but_not_imported(type_hint, code):
+            if reader._is_type_hint_used_in_args(
+                type_hint, code
+            ) and not reader._is_type_hint_imported(type_hint, code):
                 error_detail = {
                     "error": "Type hint Error",
                     "traceback": f"Type hint '{type_hint}' is used but not imported in the code.",

src/backend/langflow/interface/custom/directory_reader.py

@@ -152,15 +152,19 @@ class DirectoryReader:
         Check if a specific type hint is used in the
         function definitions within the given code.
         """
-        module = ast.parse(code)
+        try:
+            module = ast.parse(code)
 
-        for node in ast.walk(module):
-            if isinstance(node, ast.FunctionDef):
-                for arg in node.args.args:
-                    if self._is_type_hint_in_arg_annotation(
-                        arg.annotation, type_hint_name
-                    ):
-                        return True
+            for node in ast.walk(module):
+                if isinstance(node, ast.FunctionDef):
+                    for arg in node.args.args:
+                        if self._is_type_hint_in_arg_annotation(
+                            arg.annotation, type_hint_name
+                        ):
+                            return True
+        except SyntaxError:
+            # Returns False if the code is not valid Python
+            return False
         return False
 
     def _is_type_hint_in_arg_annotation(self, annotation, type_hint_name: str) -> bool:
@@ -204,8 +208,13 @@ class DirectoryReader:
             return False, "Syntax error"
         elif not self.validate_build(file_content):
             return False, "Missing build function"
-        elif self.is_type_hint_used_but_not_imported("Optional", file_content):
-            return False, "Type hint 'Optional' is used but not imported in the code."
+        elif self._is_type_hint_used_in_args(
+            "Optional", file_content
+        ) and not self._is_type_hint_imported("Optional", file_content):
+            return (
+                False,
+                "Type hint 'Optional' is used but not imported in the code.",
+            )
         else:
             if self.compress_code_field:
                 file_content = str(StringCompressor(file_content).compress_string())

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

@@ -116,9 +116,12 @@ def instantiate_based_on_type(class_object, base_type, node_type, params):
 
 
 def instantiate_custom_component(node_type, class_object, params):
-    class_object = get_function_custom(params.pop("code"))
+    # we need to make a copy of the params because we will be
+    # modifying it
+    params_copy = params.copy()
+    class_object = get_function_custom(params_copy.pop("code"))
     custom_component = class_object()
-    built_object = custom_component.build(**params)
+    built_object = custom_component.build(**params_copy)
     return built_object, {"repr": custom_component.custom_repr()}
 
 

src/frontend/src/components/headerComponent/index.tsx

@@ -31,9 +31,24 @@ export default function Header() {
   return (
     <div className="header-arrangement">
       <div className="header-start-display">
-        <Link to="/">
-          <span className="ml-4 text-2xl">⛓️</span>
-        </Link>
+        {tabId === "" || !tabId ? (
+          <div className="ml-2">
+            <a
+              href="https://www.langflow.org/"
+              target="_blank"
+              rel="noreferrer"
+              className="header-waitlist-link-box"
+            >
+              <span className="pr-1 text-2xl">⛓️</span>
+              <span>Join The Waitlist</span>
+            </a>
+          </div>
+        ) : (
+          <Link to="/">
+            <span className="ml-4 text-2xl">⛓️</span>
+          </Link>
+        )}
+
         {flows.findIndex((f) => tabId === f.id) !== -1 && tabId !== "" && (
           <MenuBar flows={flows} tabId={tabId} />
         )}

src/frontend/src/components/ui/popover.tsx

@@ -27,4 +27,4 @@ const PopoverContent = React.forwardRef<
 ));
 PopoverContent.displayName = PopoverPrimitive.Content.displayName;
 
-export { Popover, PopoverTrigger, PopoverContent };
+export { Popover, PopoverContent, PopoverTrigger };

src/frontend/src/style/applies.css

@@ -495,6 +495,12 @@
   .header-github-link-box {
     @apply inline-flex h-9 items-center justify-center rounded-md border border-input px-3 pr-0 shadow-sm;
   }
+  .header-waitlist-link-box {
+    @apply inline-flex h-9 items-center justify-center rounded-md border border-input px-2 shadow-sm text-sm  font-medium text-muted-foreground ring-offset-background disabled:pointer-events-none disabled:opacity-50 whitespace-nowrap;
+  }
+  .header-waitlist-link-box:hover {
+    @apply hover:bg-accent hover:text-accent-foreground;
+  }
   .header-github-link {
     @apply header-github-link-box text-sm  font-medium text-muted-foreground ring-offset-background disabled:pointer-events-none disabled:opacity-50;
   }