from datetime import UTC, datetime

from sqlmodel import Field, SQLModel


class BaseModel(SQLModel):
    """Base model with common fields for all models."""

    id: int | None = Field(primary_key=True, default=None)

    # timestamps
    created_at: datetime = Field(default_factory=lambda: datetime.now(UTC))
    updated_at: datetime = Field(default_factory=lambda: datetime.now(UTC))