python - 《Flask Web 开发》 无法更新数据库
学习到《Flask Web开发》第八章时，运行代码报错。后来意识到User表中新增了一列，应该更新数据库，执行
python manage.py db migrate -m "initial migration"结果报错：alembic.util.exc.CommandError: Target database is not up to date.
这种错误先前没有遇到过，网上找了一下也不理解。
相关代码app/models.py:
from . import db
from werkzeug.security import generate_password_hash, check_password_hash
from flask_login import UserMixin
from . import login_manager
from itsdangerous import TimedJSONWebSignatureSerializer as Serializer
from flask import current_app
@login_manager.user_loader
def load_user(user_id):
return User.query.get(int(user_id))
class Role(db.Model):
__tablename__ = 'roles'
id = db.Column(db.Integer, primary_key = True)
name = db.Column(db.String(64), unique = True)
users = db.relationship('User', backref = 'role', lazy = 'dynamic')
def __repr__(self):
return '<Role %r>' % self.name
class User(UserMixin, db.Model):
__tablename__ = 'users'
id = db.Column(db.Integer, primary_key = True)
email = db.Column(db.String(64), unique=True, index=True)
username = db.Column(db.String(64), unique = True, index = True)
role_id = db.Column(db.Integer, db.ForeignKey('roles.id'))
password_hash = db.Column(db.String(128))
confirmed = db.Column(db.Boolean, default=False)
@property
def password(self):
raise AttributeError('password is not a readable attribute')
@password.setter
def password(self, password):
self.password_hash = generate_password_hash(password)
def verify_password(self, password):
return check_password_hash(self.password_hash, password)
def __repr__(self):
return '<User %r>' % self.username
def generate_confirmation_token(self, expiration=3600):
s = Serializer(current_app.config['SECRET_KEY'], expiration)
return s.dump({'confirm': self.id})
def confirm(self, token):
s = Serializer(current_app.config['SECRET_KEY'])
try:
data = s.loads(token)
except:
return False
if data.get('confirm') != self.id:
return False
self.confirmed = True
db.session.add(self)
return True求指导！！！
