151 lines
4.7 KiB
Python
151 lines
4.7 KiB
Python
from datetime import datetime
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from flask_sqlalchemy import SQLAlchemy
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from flask_login import UserMixin
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from werkzeug.security import generate_password_hash, check_password_hash
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db = SQLAlchemy()
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class User(UserMixin, db.Model):
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"""用户模型"""
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__tablename__ = 'users'
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id = db.Column(db.Integer, primary_key=True)
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username = db.Column(db.String(80), unique=True, nullable=False, index=True)
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email = db.Column(db.String(120), unique=True, nullable=False, index=True)
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password_hash = db.Column(db.String(255), nullable=False)
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# 学生身份验证
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student_id_photo = db.Column(db.String(255)) # 学生证照片路径
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is_approved = db.Column(db.Boolean, default=False) # 是否通过审核
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# 权限
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is_admin = db.Column(db.Boolean, default=False)
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password_changed = db.Column(db.Boolean, default=True) # 管理员首次登录需修改密码
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# 个人信息
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bio = db.Column(db.Text)
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avatar = db.Column(db.String(255))
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# 时间戳
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created_at = db.Column(db.DateTime, default=datetime.utcnow, index=True)
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# 关系
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posts = db.relationship('Post', backref='author', lazy='dynamic', cascade='all, delete-orphan')
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comments = db.relationship('Comment', backref='author', lazy='dynamic', cascade='all, delete-orphan')
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# 关注关系
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following = db.relationship(
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'Follow',
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foreign_keys='Follow.follower_id',
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backref='follower',
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lazy='dynamic',
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cascade='all, delete-orphan'
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)
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followers = db.relationship(
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'Follow',
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foreign_keys='Follow.following_id',
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backref='following',
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lazy='dynamic',
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cascade='all, delete-orphan'
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)
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def set_password(self, password):
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"""设置密码"""
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self.password_hash = generate_password_hash(password)
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def check_password(self, password):
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"""验证密码"""
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return check_password_hash(self.password_hash, password)
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def is_following(self, user):
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"""检查是否关注了某用户"""
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return self.following.filter_by(following_id=user.id).first() is not None
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def follow(self, user):
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"""关注用户"""
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if not self.is_following(user):
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follow = Follow(follower_id=self.id, following_id=user.id)
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db.session.add(follow)
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def unfollow(self, user):
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"""取消关注"""
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follow = self.following.filter_by(following_id=user.id).first()
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if follow:
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db.session.delete(follow)
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def get_follower_count(self):
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"""获取粉丝数"""
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return self.followers.count()
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def get_following_count(self):
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"""获取关注数"""
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return self.following.count()
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def __repr__(self):
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return f'<User {self.username}>'
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class Post(db.Model):
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"""帖子模型"""
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__tablename__ = 'posts'
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id = db.Column(db.Integer, primary_key=True)
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user_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False, index=True)
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# 内容
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image_path = db.Column(db.String(255), nullable=False)
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description = db.Column(db.Text)
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# 审核状态
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is_approved = db.Column(db.Boolean, default=False, index=True)
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# 时间戳
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created_at = db.Column(db.DateTime, default=datetime.utcnow, index=True)
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# 关系
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comments = db.relationship('Comment', backref='post', lazy='dynamic', cascade='all, delete-orphan')
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def get_comment_count(self):
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"""获取评论数"""
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return self.comments.count()
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def __repr__(self):
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return f'<Post {self.id}>'
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class Comment(db.Model):
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"""评论模型"""
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__tablename__ = 'comments'
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id = db.Column(db.Integer, primary_key=True)
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post_id = db.Column(db.Integer, db.ForeignKey('posts.id'), nullable=False, index=True)
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user_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False, index=True)
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# 内容
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content = db.Column(db.Text, nullable=False)
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# 时间戳
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created_at = db.Column(db.DateTime, default=datetime.utcnow, index=True)
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def __repr__(self):
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return f'<Comment {self.id}>'
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class Follow(db.Model):
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"""关注关系模型"""
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__tablename__ = 'follows'
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id = db.Column(db.Integer, primary_key=True)
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follower_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False, index=True)
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following_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False, index=True)
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created_at = db.Column(db.DateTime, default=datetime.utcnow)
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# 确保同一用户不能重复关注
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__table_args__ = (
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db.UniqueConstraint('follower_id', 'following_id', name='unique_follow'),
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)
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def __repr__(self):
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return f'<Follow {self.follower_id} -> {self.following_id}>'
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