Question

我正在尝试创建一个新对象并在其上附加一个已经存在的对象，但是我收到一个错误“ sqlalchemy.exc.InvalidRequestError：Object”已附加到会话“ 4”（这是“ 5'）“

这是我的模特：

class User(Base):
__tablename__ = 'users'
id = Column(Integer, primary_key=True,autoincrement=True)
username = Column(String(20), nullable=False)
password = Column(String(30), nullable=False)
name = Column(String(300), nullable=False)
conversation = relationship('Conversation',backref ='users',lazy='subquery')


class Response(Base):
__tablename__ = 'responses'
id = Column(Integer, primary_key=True,autoincrement=True)
response = Column(String(500), nullable=False)
intent_id = Column(Integer, ForeignKey('intents.id'))


class Pattern(Base):
__tablename__ = 'patterns'
id = Column(Integer, primary_key=True,autoincrement=True)
pattern = Column(String(300), nullable=False)
intent_id = Column(Integer, ForeignKey('intents.id'))


class Conversation(Base):
__tablename__ = 'conversations'
id = Column(Integer, primary_key=True,autoincrement=True)
question = Column(String(500), nullable=False)
classify = Column(Float(5))
date = Column(DateTime, default=datetime.datetime.now())

response_id = Column(Integer, ForeignKey('responses.id'))
response = relationship('Response', lazy='subquery')

intent_id = Column(Integer, ForeignKey('intents.id'))
intent = relationship('Intent', lazy='subquery')

user_id = Column(Integer, ForeignKey('users.id'))
user = relationship('User', lazy='subquery')


class Intent(Base):
__tablename__ = 'intents'
id = Column(Integer, primary_key = True,autoincrement=True)
tag = Column(String(50), nullable = False)
context_filter = Column(String(50), nullable = True)
context_set = Column(String(50), nullable = True)
patterns = relationship('Pattern',backref ='intents', lazy='subquery')
responses = relationship('Response',backref='intents', lazy='subquery')

我正在尝试从数据库中获取意图并放入新的对话对象中，这是我正在尝试执行的操作，但它不起作用：

cv = Conversation()
cv.user = getSingleUser(question['idUser'])

cv.question = question['question']
cv.classify = classify[1]

responseDict = chatBotResponse(question['question'])
cv.response = getSingleResponse(responseDict['id'])

intent = getIntentByName(classify[0])
cv.intent = intent

insertEdit(cv)

//数据库类

from sqlalchemy.orm import sessionmaker
DBSession = sessionmaker(bind=engine)

def getSingleUser(id):
    session = DBSession()
    user = session.query(User).filter_by(id=id).first()
    session.close()
    return user

def getSingleResponse(id):
    session = DBSession()
    response = session.query(Response).filter_by(id=id).first()
    session.close()
    return response

def getIntentByName(name):
    session = DBSession()
    intent = session.query(Intent).filter_by(tag=name).first()
    return intent

def insertEdit(obj):
    session = DBSession()
    session.add(obj)
    session.commit()
    session.close()

但是我得到的只是

sqlalchemy.exc.InvalidRequestError：对象“意图为0x226e9ffe5f8”已附加到会话“ 4”（此为“ 5”）

有人可以指出我做错了什么，而做我需要的最好方法是什么？

谢谢！

将现有对象附加到SQLAlchemy和Flask上的新对象中

0 个答案: