old_contents: # coding: utf-8
  from datetime import datetime
  from werkzeug.security import generate_password_hash, check_password_hash
  from ._base import db
  
  
  class User(db.Model):
      id = db.Column(db.Integer, primary_key=True)
      name = db.Column(db.String(50), unique=True)
      email = db.Column(db.String(50), unique=True)
      avatar = db.Column(db.String(200))
      password = db.Column(db.String(200))
      is_admin = db.Column(db.Boolean, default=False)
      created_at = db.Column(db.DateTime, default=datetime.now)
  
      def __setattr__(self, name, value):
          # Hash password when set it.
          if name == 'password':
              value = generate_password_hash(value)
          super(User, self).__setattr__(name, value)
  
      def check_password(self, password):
          return check_password_hash(self.password, password)
  
      def __repr__(self):
          return '<User %s>' % self.name
  
new_contents: # coding: utf-8
  from datetime import datetime
  from werkzeug.security import generate_password_hash, check_password_hash
  from ._base import db
  from ..utils.uploadsets import avatars
  
  
  class User(db.Model):
      id = db.Column(db.Integer, primary_key=True)
      name = db.Column(db.String(50), unique=True)
      email = db.Column(db.String(50), unique=True)
      avatar = db.Column(db.String(200), default='default.png')
      password = db.Column(db.String(200))
      is_admin = db.Column(db.Boolean, default=False)
      created_at = db.Column(db.DateTime, default=datetime.now)
  
      def __setattr__(self, name, value):
          # Hash password when set it.
          if name == 'password':
              value = generate_password_hash(value)
          super(User, self).__setattr__(name, value)
  
      def check_password(self, password):
          return check_password_hash(self.password, password)
  
      @property
      def avatar_url(self):
          return avatars.url(self.avatar)
  
      def __repr__(self):
          return '<User %s>' % self.name
  
subject: Add avatar_url property to User.