problem description
the environmental background of the problems and what methods you have tried
related codes
/ / Please paste the code text below (do not replace the code with pictures)
class Comment (Model):
"""comment and reply
"""
__tablename__ = "comment"
id = Column(Integer, primary_key=True, autoincrement=True)
comments = relationship("Comment", back_populates="comment")
parent_comment_id = Column(Integer, ForeignKey("comment.id"), nullable=True)
what result do you expect? What is the error message actually seen?
sqlalchemy.exc.NoForeignKeysError: Could not determine join condition between parent/child tables on relationship Comment.comments-there are no foreign keys linking these tables. Ensure that referencing columns are associated with a ForeignKey or ForeignKeyConstraint, or specify a "primaryjoin" expression.