class Post(db.Model):
id = db.Column(db.Integer, primary_key=True)
title = db.Column(db.String(60))
body = db.Column(db.Text)
timestamp = db.Column(db.DateTime, default=datetime.utcnow, index=True)
can_comment = db.Column(db.Boolean, default=True)
author_id = db.Column(db.Integer, db.ForeignKey('admin.id'))
category_id = db.Column(db.Integer, db.ForeignKey('category.id'))
category = db.relationship('Category', back_populates='posts')
comments = db.relationship('Comment', back_populates='post', cascade='all')
author = db.relationship('Admin', back_populates='posts')
class Post(db.Model):
id = db.Column(db.Integer, primary_key=True)
title = db.Column(db.String(30))
timestamp = db.Column(db.DateTime, default=datetime.utcnow) # 时间戳
body = db.Column(db.Text)
can_comments = db.Column(db.Boolean, default=True)
category_id = db.Column(db.Integer,
db.ForeignKey('category.id')) # 将category_id设置为外键
category = db.relationship('Category', back_populates='posts')
admin_id = db.Column(db.Integer, db.ForeignKey('admin.id'))
admin = db.relationship('Admin', back_populates='posts')
comments = db.relationship('Comment',
back_populates='post',
cascade='all, delete-orphan') # cascade设置级联操作
class Comments(db.Model):
id = db.Column(db.Integer, primary_key=True)
author = db.Column(db.String(30))
email = db.Column(db.String(254))
site = db.Column(db.String(255))
body = db.Column(db.Text)
from_admin = db.Column(db.Boolean, default=False)
reviewed = db.Column(db.Boolean, default=False)
timestamp = db.Column(db.DateTime, default=datetime.utcnow, index=True)
posts_id = db.Column(db.Integer, db.ForeignKey('ports.id'))
posts = db.relationship('Post', back_populates='comments')
replied_id = db.Column(db.Integer, db.ForeignKey('comments.id'))
replies = db.relationship('Comments', back_populates='replied', cascade='all, delete-orphan')
replied = db.relationship('Comments', back_populates='replies', remote_side=[id])
class Comment(db.Model):
id = db.Column(db.Integer, primary_key=True)
author_name = db.Column(db.String(30))
body = db.Column(db.Text)
reviewed = db.Column(db.Boolean, default=False)
timestamp = db.Column(db.DateTime, default=datetime.utcnow, index=True)
author_id = db.Column(db.Integer, db.ForeignKey('admin.id'))
replied_id = db.Column(db.Integer, db.ForeignKey('comment.id'))
post_id = db.Column(db.Integer, db.ForeignKey('post.id'))
post_id_r = db.Column(db.Integer)
author = db.relationship('Admin', back_populates='comments')
post = db.relationship('Post', back_populates='comments')
replies = db.relationship('Comment',
back_populates='replied',
cascade='all, delete-orphan')
replied = db.relationship('Comment',
back_populates='replies',
remote_side=[id])
class Comment(db.Model):
id = db.Column(db.Integer, primary_key=True)
author = db.Column(db.String(20))
timestamp = db.Column(db.DateTime, default=datetime.utcnow)
body = db.Column(db.Text)
from_admin = db.Column(db.Boolean, default=False)
reviewed = db.Column(db.Boolean, default=False)
post_id = db.Column(db.Integer, db.ForeignKey('post.id'))
post = db.relationship('Post', back_populates='comments')
# 建立邻接列表关系(在同一个模型内的一对多关系)
replied_id = db.Column(db.Integer, db.ForeignKey('comment.id'))
# replied表示被回复评论的标量关系属性, remote_side=[id]将id字段定义为关系远程侧
replied = db.relationship('Comment',
back_populates='replies',
remote_side=[id])
replies = db.relationship('Comment',
back_populates='replied',
cascade='all')