Here's the `comments.py` file with a SQLAlchemy model for comments:


from sqlalchemy import Column, ForeignKey, Integer, String, Text
from sqlalchemy.orm import relationship

from app.db.base_class import Base

class Comment(Base):
    __tablename__ = "comments"

    id = Column(Integer, primary_key=True, index=True)
    content = Column(Text, nullable=False)
    author = Column(String(100), nullable=False)
    post_id = Column(Integer, ForeignKey("posts.id"), nullable=False)

    post = relationship("Post", back_populates="comments")

    def __repr__(self):
        return f"Comment(id={self.id}, author='{self.author}', content='{self.content[:20]}...')"

Explanation:


Note: This code assumes that you have already defined the `Post` model in a separate file, and that the necessary imports and database setup are handled elsewhere in your FastAPI project.