split files, database and S3, models

app/models.py

@@ -0,0 +1,19 @@
+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")