🐛 fix(flow.py): make description field nullable with a default value …

…of None to allow empty descriptions

🐛 fix(user.py): make last_login_at field nullable to handle cases where user has not logged in yet
🐛 fix(user.py): set default values for optional fields in UserUpdate model to None to avoid unexpected behavior

src/backend/langflow/services/database/models/flow/flow.py

@@ -13,7 +13,7 @@
 
 class FlowBase(SQLModelSerializable):
  name: str = Field(index=True)
- description: Optional[str] = Field(index=True)
+ description: Optional[str] = Field(index=True, nullable=True, default=None)
  data: Optional[Dict] = Field(default=None, nullable=True)
 
  @validator("data")

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

@@ -20,7 +20,7 @@ class User(SQLModelSerializable, table=True):
  is_superuser: bool = Field(default=False)
  create_at: datetime = Field(default_factory=datetime.utcnow)
  updated_at: datetime = Field(default_factory=datetime.utcnow)
- last_login_at: Optional[datetime] = Field()
+ last_login_at: Optional[datetime] = Field(nullable=True)
  api_keys: list["ApiKey"] = Relationship(
  back_populates="user",
  sa_relationship_kwargs={"cascade": "delete"},
@@ -41,13 +41,13 @@ class UserRead(SQLModel):
  is_superuser: bool = Field()
  create_at: datetime = Field()
  updated_at: datetime = Field()
- last_login_at: Optional[datetime] = Field()
+ last_login_at: Optional[datetime] = Field(nullable=True)
 
 
 class UserUpdate(SQLModel):
- username: Optional[str]
- profile_image: Optional[str]
- password: Optional[str]
- is_active: Optional[bool]
- is_superuser: Optional[bool]
- last_login_at: Optional[datetime]
+ username: Optional[str] = None
+ profile_image: Optional[str] = None
+ password: Optional[str] = None
+ is_active: Optional[bool] = None
+ is_superuser: Optional[bool] = None
+ last_login_at: Optional[datetime] = None