Python Flask 模型介绍和配置方法

pip3 install pymysql        建公路

pip3 install flask-sqlalchemy    实现ORM映射

pip3 install flask-migrate     发布命令工具

# mysql+pymysql://user:password@hostip:port/databasename
# 数据库+pymysql://用户名:密码@主机ip:端口/数据库名
SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://root:root@127.0.0.1:3306/flaskdemo'

   db = SQLAlchemy()   ---->必须跟app联系

   def create_app():
        ....
        # 跟app联系
        db.init_app(app)

        return app

  class User(db.Model):      ------> user表
    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
    username = db.Column(db.String(15), nullable=False)
    password = db.Column(db.String(12), nullable=False)
    phone = db.Column(db.String(11), unique=True)
    rdatetime = db.Column(db.DateTime, default=datetime.now)

     项目结构
      | ---apps
      | ---ext
      | ---migrations    flask db init     只需要init一次
               |---versions   版本文件夹
                    |---71edde7ee937_.py    ---》 flask db migrate  迁移
                    |---cc0dca61130f_.py
                                                  flask  db upgrade 同步
                                                  flask  db downgrade 降级

# 用户注册
@user_bp.route('/register', methods=['GET', 'POST'])
def register():
    if request.method == 'POST':
        username = request.form.get('username')
        password = request.form.get('password')
        repassword = request.form.get('repassword')
        phone = request.form.get('phone')
        email = request.form.get('email')
        if password == repassword:
            # 注册用户
            user = User()
            user.username = username
            # 自定义加密：new_password = hashlib.sha256(password.encode('utf-8')).hexdigest()
            # 使用自带的函数实现加密：generate_password_hash
            user.password = generate_password_hash(password)
            print(len(user.password))
            user.phone = phone
            user.email = email
            # 添加并提交
            db.session.add(user)
            db.session.commit()
            return redirect(url_for('user.index'))
    return render_template('user/register.html')