Fix type annotations and imports in code

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

@@ -4,6 +4,7 @@ from fastapi import APIRouter, Depends, HTTPException
 from sqlalchemy import func
 from sqlalchemy.exc import IntegrityError
 from sqlmodel import Session, select
+from sqlmodel.sql.expression import SelectOfScalar
 
 from langflow.api.v1.schemas import UsersResponse
 from langflow.services.auth.utils import (
@@ -62,7 +63,7 @@ def read_all_users(
     """
     Retrieve a list of users from the database with pagination.
     """
-    query = select(User).offset(skip).limit(limit)
+    query: SelectOfScalar = select(User).offset(skip).limit(limit)
     users = session.exec(query).fetchall()
 
     count_query = select(func.count()).select_from(User)  # type: ignore

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

@@ -1,6 +1,8 @@
 from typing import Dict, Generator, List, Type, Union
 
 from langchain.chains.base import Chain
+from loguru import logger
+
 from langflow.graph.edge.base import Edge
 from langflow.graph.graph.constants import lazy_load_vertex_dict
 from langflow.graph.graph.utils import process_flow
@@ -8,7 +10,6 @@ from langflow.graph.vertex.base import Vertex
 from langflow.graph.vertex.types import FileToolVertex, LLMVertex, ToolkitVertex
 from langflow.interface.tools.constants import FILE_TOOLS
 from langflow.utils import payload
-from loguru import logger
 
 
 class Graph:
@@ -229,9 +230,9 @@ class Graph:
             vertex_lc_type: str = vertex_data["node"]["template"]["_type"]  # type: ignore
 
             VertexClass = self._get_vertex_class(vertex_type, vertex_lc_type)
-            vertex = VertexClass(vertex, graph=self)
+            vertex_instance = VertexClass(vertex, graph=self)
-            vertex.set_top_level(self.top_level_vertices)
+            vertex_instance.set_top_level(self.top_level_vertices)
-            vertices.append(vertex)
+            vertices.append(vertex_instance)
 
         return vertices
 

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

@@ -6,6 +6,7 @@ from typing import Any, Dict, List, Type, Union
 
 from cachetools import TTLCache, cachedmethod, keys
 from fastapi import HTTPException
+
 from langflow.interface.custom.schema import CallableCodeDetails, ClassCodeDetails
 
 
@@ -35,7 +36,7 @@ class CodeParser:
         """
         Initializes the parser with the provided code.
         """
-        self.cache = TTLCache(maxsize=1024, ttl=60)
+        self.cache: TTLCache = TTLCache(maxsize=1024, ttl=60)
         if isinstance(code, type):
             if not inspect.isclass(code):
                 raise ValueError("The provided code must be a class.")

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

@@ -5,6 +5,7 @@ from uuid import UUID
 import yaml
 from cachetools import TTLCache, cachedmethod
 from fastapi import HTTPException
+
 from langflow.interface.custom.component import Component
 from langflow.interface.custom.directory_reader import DirectoryReader
 from langflow.interface.custom.utils import (
@@ -187,7 +188,7 @@ class CustomComponent(Component):
             # Retrieve and decrypt the credential by name for the current user
             db_service = get_db_service()
             with session_getter(db_service) as session:
-                return credential_service.get_credential(user_id=self._user_id, name=name, session=session)
+                return credential_service.get_credential(user_id=self._user_id or "", name=name, session=session)
 
         return get_credential
 

src/backend/langflow/services/database/models/api_key/crud.py

@@ -1,21 +1,19 @@
 import datetime
 import secrets
 import threading
-from uuid import UUID
 from typing import List, Optional
+from uuid import UUID
+
 from sqlmodel import Session, select
-from langflow.services.database.models.api_key import (
+from sqlmodel.sql.expression import SelectOfScalar
-    ApiKey,
+
-    ApiKeyCreate,
+from langflow.services.database.models.api_key import ApiKey, ApiKeyCreate, ApiKeyRead, UnmaskedApiKeyRead
-    UnmaskedApiKeyRead,
-    ApiKeyRead,
-)
 
 
 def get_api_keys(session: Session, user_id: UUID) -> List[ApiKeyRead]:
-    query = select(ApiKey).where(ApiKey.user_id == user_id)
+    query: SelectOfScalar = select(ApiKey).where(ApiKey.user_id == user_id)
     api_keys = session.exec(query).all()
-    return [ApiKeyRead.from_orm(api_key) for api_key in api_keys]
+    return [ApiKeyRead.model_validate(api_key) for api_key in api_keys]
 
 
 def create_api_key(session: Session, api_key_create: ApiKeyCreate, user_id: UUID) -> UnmaskedApiKeyRead:
@@ -46,7 +44,7 @@ def delete_api_key(session: Session, api_key_id: UUID) -> None:
 
 def check_key(session: Session, api_key: str) -> Optional[ApiKey]:
     """Check if the API key is valid."""
-    query = select(ApiKey).where(ApiKey.api_key == api_key)
+    query: SelectOfScalar = select(ApiKey).where(ApiKey.api_key == api_key)
     api_key_object: Optional[ApiKey] = session.exec(query).first()
     if api_key_object is not None:
         threading.Thread(

src/backend/langflow/services/database/models/credential/model.py

@@ -2,9 +2,10 @@ from datetime import datetime
 from typing import TYPE_CHECKING, Optional
 from uuid import UUID, uuid4
 
-from langflow.services.database.models.credential.schema import CredentialType
 from sqlmodel import Field, Relationship, SQLModel
 
+from langflow.services.database.models.credential.schema import CredentialType
+
 if TYPE_CHECKING:
     from langflow.services.database.models.user import User
 
@@ -24,9 +25,6 @@ class Credential(CredentialBase, table=True):
     user_id: UUID = Field(description="User ID associated with this credential", foreign_key="user.id")
     user: "User" = Relationship(back_populates="credentials")
 
-    if TYPE_CHECKING:
-        user: "User" = Relationship(back_populates="credentials")
-
 
 class CredentialCreate(CredentialBase):
     # AcceptedProviders is a custom Enum

src/backend/langflow/services/database/models/user/model.py

@@ -24,7 +24,7 @@ class User(SQLModel, table=True):
         back_populates="user",
         sa_relationship_kwargs={"cascade": "delete"},
     )
-    store_api_key: str = Field(default=None, nullable=True)
+    store_api_key: Optional[str] = Field(default=None, nullable=True)
     flows: list["Flow"] = Relationship(back_populates="user")
     credentials: list["Credential"] = Relationship(
         back_populates="user",

src/backend/langflow/services/store/service.py

@@ -482,7 +482,7 @@ class StoreService(Service):
 
             result: List[ListComponentResponse] = []
             authorized = False
-            metadata = {}
+            metadata: Dict = {}
             comp_count = 0
             try:
                 result, metadata = await self.query_components(