class PostComment(db.Model):
id = db.Column(db.String(32), primary_key=True)
timestamp = db.Column(db.DateTime, default=datetime.utcnow,
index=True) # 评论时间
body = db.Column(db.Text) # 评论内容
post_id = db.Column(db.String(32), db.ForeignKey('post.id')) # 文章ID-外键
post = db.relationship('Post', back_populates='post_comments') # 文章-反向关联
class TbMessage(db.Model):
id = db.Column(db.String(40), primary_key=True)
title = db.Column(db.String(20))
body = db.Column(db.Text)
timestamp = db.Column(db.DateTime, default=datetime.utcnow, index=True)
def __repr__(self):
return "<Message body %r>" % self.body
class Post(db.Model):
id = db.Column(db.String(32), primary_key=True)
title = db.Column(db.String(100)) #文章标题
body = db.Column(db.Text) #文章内容
timestamp = db.Column(db.DateTime, default=datetime.utcnow,
index=True) #发表时间
category_id = db.Column(db.String(32),
db.ForeignKey('category.id')) #所属分类ID-外键
category = db.relationship('Category', back_populates='posts') #所属分类-反向关联
comments = db.relationship('Comment', back_populates='post',
cascade='all') #文章评论-反向关联
post_comments = db.relationship('PostComment',
back_populates='post',
cascade='all') #文章简单评论-反向关联
class Comment(db.Model):
id = db.Column(db.String(32), primary_key=True)
author = db.Column(db.String(30)) #作者
email = db.Column(db.String(254)) #邮箱
site = db.Column(db.String(255)) #个人网址
body = db.Column(db.Text) #评论内容
from_admin = db.Column(db.Boolean, default=False) #来着博主
reviewed = db.Column(db.Boolean, default=False) #已审核
timestamp = db.Column(db.DateTime, default=datetime.utcnow,
index=True) #发表时间
post_id = db.Column(db.String(32), db.ForeignKey('post.id')) #文章ID-外键
post = db.relationship('Post', back_populates='comments') #文章-反向关联
comment_id = db.Column(db.String(32),
db.ForeignKey('comment.id')) #评论ID-自身外键
replied = db.relationship('Comment',
back_populates='replies',
remote_side=[id]) #父评论-反向关联
replies = db.relationship('Comment',
back_populates='replied',
cascade='all') #子评论-反向关联
class TbArticle(db.Model):
id = db.Column(db.String(40), primary_key=True)
title = db.Column(db.String(20))
body = db.Column(db.Text)
timestamp = db.Column(db.DateTime, default=datetime.utcnow, index=True)
#设置外键:键值为另一侧的表名和主键字段名
author_id = db.Column(db.String(40), db.ForeignKey('tb_author.id'))
def __repr__(self):
return "<Article %s>" % self.title
association_table = db.Table(
'association',
db.Column('student_id', db.String(40), db.ForeignKey('student.id')),
db.Column('teacher_id', db.String(40), db.ForeignKey('teacher.id')))
class Student(db.Model):
id = db.Column(db.String(40), primary_key=True)
name = db.Column(db.String(50), unique=True)
grade = db.Column(db.String(10))
clazz = db.Column(db.String(10))
teachers = db.relationship('Teacher',
secondary=association_table,
back_populates='students')
class Teacher(db.Model):
id = db.Column(db.String(40), primary_key=True)
