Question

当我尝试使用datetime属性创建对象时，我收到以下错误：

datebase_setup文件：

from sqlalchemy import Column, ForeignKey, Integer, String, DateTime
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship
from sqlalchemy import create_engine
Base = declarative_base()
class User(Base):
   __tablename__ = 'user'
   id = Column(Integer, primary_key = True)
   name = Column(String(200), nullable = False)
   email = Column(String(200), nullable = False)
   picture = Column(String(300))

class Category(Base):
   __tablename__ = 'category'

   id = Column(Integer, primary_key = True)
   name = Column(String(200), nullable = False)
   #user_id = Column(Integer, ForeignKey('user.id'))
   #user = relationship(User)

class Item(Base):
   __tablename__ = 'item'

   id = Column(Integer, primary_key = True)
   name = Column(String(100), nullable = False)
   date = Column(DateTime, nullable = False)
   description = Column(String(300))
   price = Column(String(8))
   item_id = Column(Integer, ForeignKey('category.id'))
   user_id = Column(Integer, ForeignKey('user.id'))
   category = relationship(Category)
   user = relationship(User)

engine = create_engine('sqlite:///categoryitem.db')
Base.metadata.create_all(engine)

插入目标文件：

from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
import datetime
from database_setup import *

engine = create_engine('sqlite:///categoryitem.db')
Base.metadata.bind = engine

DBSession = sessionmaker(bind=engine)
session = DBSession()

user1 = User(name = "a",
         email = "abc@gmail.com",
         picture = "someurl")
session.add(user1)
session.commit()

category1 = Category(name = "Books")
session.add(category1)
session.commit()

item1 = Item(name = "Da Vinci Code",
         date = datetime.datetime.now(),
         description = "2003 mystery-detective novel by Dan Brown.",
         price = "10$",
         category = category1,
         user = user1)
session.add(item1)
session.commit()

执行插入文件时收到的错误是： sqlalchemy.exc.OperationalError：（sqlite3.OperationalError）表项没有名为date的列[SQL：u＆＃39; INSERT INTO项目（名称，日期，描述，价格，item_id，user_id）VALUES（？，？，？，？，？，？）＆＃39;] [参数：（＆＃39; Da Vinci Code＆＃39;，＆＃39; 2017-10-26 17：42：10.172287＆＃39;，＆＃39; 2003之谜 - 丹·布朗的反思小说。＆＃39;，＆＃39; 10 $＆＃39;，1,1）]

感谢您抽出宝贵时间阅读我的代码，并让我知道我哪里出错了。

在SQLAlchemy中插入Datetime属性时出现操作错误

0 个答案: