import uuid
from sqlalchemy import Column, String, ForeignKey
from sqlalchemy.orm import relationship
from .database import Base

class Project(Base):
    __tablename__ = "projects"
    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    name = Column(String, nullable=False)
    # 级联删除
    markdowns = relationship("Markdown", back_populates="project", cascade="all, delete-orphan")

class Markdown(Base):
    __tablename__ = "markdowns"
    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
    title = Column(String, nullable=False)
    s3_key = Column(String, nullable=False)
    project_id = Column(String, ForeignKey("projects.id", ondelete="CASCADE"))
    project = relationship("Project", back_populates="markdowns")