class Comments(db.Model):
__table_args__ = {"useexisting": True}
id = db.Column(db.Integer, primary_key=True)
# 评论内容
content = db.Column(db.Text, nullable=False)
# 评论用户
from_user = db.relationship("User", back_populates="comments")
from_user_id = db.Column(db.Integer, db.ForeignKey("user.id"))
# 评论发布日期
send_time = db.Column(db.DateTime, default=datetime.utcnow)
# 评论是否是回复
is_reply = db.Column(db.Boolean, default=False)
# 评论属于的讨论
belong_talking = db.relationship("Talkings", back_populates="comments")
belong_talking_id = db.Column(db.Integer, db.ForeignKey("talkings.id"))
# 被回复的评论id
replied_id = db.Column(db.Integer, db.ForeignKey("comments.id"))
# 被回复的评论
replied = db.relationship("Comments",
back_populates="replies",
remote_side=[id])
# 该评论的所有回复
replies = db.relationship("Comments",
back_populates="replied",
cascade="all")
class Notices(db.Model):
__table_args__ = {"useexisting": True}
id = db.Column(db.Integer, primary_key=True)
title = db.Column(db.String(255), nullable=False)
content = db.Column(db.Text, nullable=False)
belong_class = db.relationship("Class", back_populates="notices")
belong_class_id = db.Column(db.Integer, db.ForeignKey("class.id"))
create_time = db.Column(db.DateTime, default=datetime.utcnow)
class FinishStatus(db.Model):
__table_args__ = {"useexisting": True}
# id
id = db.Column(db.Integer, primary_key=True)
# 作业,与作业表关联
assignment = db.relationship("Assignment", back_populates="finish_status")
assignment_id = db.Column(db.Integer, db.ForeignKey("assignment.id"))
# 提交用户,与用户表关联
finish_user = db.relationship("User", back_populates="assignments")
finish_user_id = db.Column(db.Integer, db.ForeignKey("user.id"))
# 提交内容
finish_content = db.Column(db.Text, nullable=False)
# 提交时间
finish_time = db.Column(db.DateTime, default=datetime.utcnow)
# 作业得分,默认表示暂无得分
score = db.Column(db.Integer, nullable=False, default=0)
# 该作业是否已批改
is_correct = db.Column(db.Integer, nullable=False, default=0)
class Talkings(db.Model):
__table_args__ = {"useexisting": True}
# id
id = db.Column(db.Integer, primary_key=True)
# 讨论题目
title = db.Column(db.String(255), nullable=False)
# 讨论内容
content = db.Column(db.Text, nullable=False)
# 讨论回复,与评论类关联
comments = db.relationship("Comments",
back_populates="belong_talking",
cascade="all")
# 讨论所属班级
belong_class = db.relationship("Class", back_populates="talkings")
belong_class_id = db.Column(db.Integer, db.ForeignKey("class.id"))
# 公开时间
publish_time = db.Column(db.DateTime, default=datetime.utcnow)
# 发起用户
publish_user = db.relationship("User", back_populates="talkings")
publish_user_id = db.Column(db.Integer, db.ForeignKey("user.id"))
class Assignment(db.Model):
__table_args__ = {"useexisting": True}
# 作业id
id = db.Column(db.Integer, primary_key=True)
# 作业标题
title = db.Column(db.String(255), nullable=False)
# 作业内容 -->
content = db.Column(db.Text, nullable=False)
# 作业发布日期
publish_date = db.Column(db.DateTime, default=datetime.utcnow)
# 作业所属目录,与SecondCategory表关联
belong_category = db.relationship("SecondCategory",
back_populates="assignment")
belong_category_id = db.Column(db.Integer,
db.ForeignKey("second_category.id"))
# 作业所属的班级
belong_class = db.relationship("Class", back_populates="assignments")
belong_class_id = db.Column(db.Integer, db.ForeignKey("class.id"))
# 作业选择题对应的答案-->"A,B,C"
answer = db.Column(db.String(255))
# 该作业的完成情况
finish_status = db.relationship("FinishStatus",
back_populates="assignment",
cascade="all")
class FirstCategory(db.Model):
__table_args__ = {"useexisting": True}
__tablename__ = "first_category"
id = db.Column(db.Integer, primary_key=True)
# 目录名
name = db.Column(db.String(255))
# 该目录属于的班级
belong_class = db.relationship("Class", back_populates="categories")
belong_class_id = db.Column(db.Integer, db.ForeignKey("class.id"))
# 该目录下的二级目录
sub_categories = db.relationship("SecondCategory",
back_populates="parent_category",
cascade="all")
# 下一个一级目录的id，若下一个没有了则为0
next_category_id = db.Column(db.Integer, default=0)
# 该目录是否是第一个目录
is_first_category = db.Column(db.Boolean, default=False)
class SecondCategory(db.Model):
__table_args__ = {"useexisting": True}
__tablename__ = "second_category"
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(255))
# 属于的父级目录
parent_category = db.relationship("FirstCategory",
back_populates="sub_categories")
parent_category_id = db.Column(db.Integer,
db.ForeignKey("first_category.id"))
# 该目录对应的视频地址
movie = db.Column(db.String(255))
# 该二级目录对应的作业
assignment = db.relationship("Assignment",
back_populates="belong_category",
cascade="all")
# 该二级目录添加的时间
add_time = db.Column(db.DateTime, default=datetime.utcnow)
# 简介
info = db.Column(db.String(255), default="该用户未填写简介~")
# 性别,True为男
gender = db.Column(db.Boolean, nullable=False, default=True)
# 创建时间
create_time = db.Column(db.DateTime, default=datetime.utcnow)
# 用户头像
avatar = db.Column(db.String(255), default="default")
# 总学习时长
total_study = db.Column(db.Integer, default=0)
# User 与 Class建立多对多关系
association_table = db.Table('association',
db.Column('user_id', db.Integer,
db.ForeignKey("user.id")),
db.Column('class_id', db.Integer,
db.ForeignKey("class.id")),
extend_existing=True)
# 用户表
class User(db.Model, BaseModel):
__table_args__ = {"useexisting": True}
# 用户班级，与Class表外键关联
user_classes = db.relationship("Class",
back_populates="stds",
secondary=association_table)
# 用户作业，集合属性，与作业状态表关联
assignments = db.relationship("FinishStatus",
back_populates="finish_user",