Question

我一直在努力使用sqlalchemy在烧瓶中制作mysql引擎。现在我正在按照教程教学如何制作引擎，导入时出现问题。我已经安装了sqlalchemy和mysql-python，但仍然遇到了这个问题。我在解决方案中搜索了此错误，但找不到它。

这是database.py

from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import scoped_session, sessionmaker


engine = create_engine('mysql://root:apmsetup@localhost/ds20161017?charset=utf8', convert_unicode=False)
db_session = scoped_session(sessionmaker(autocommit=False, autoflush=False, bind=engine))

Base = declarative_base()
Base.query = db_session.query_property()

def init_db():
    Base.metadata.create_all(engine)

models.py

from sqlalchemy import Column, Integer, String, DateTime
from database import Base

class TbTest(Base):
    _tablename_ = 'tbTable'
    id = Column(Integer, primary_key=True)
    datetime = Column(DateTime)
    string = Column(String(250))

def __init__(self, datetime, string):
    self.datetime = datetime
    self.string = string

def __repr__(self):
    return "<TbTest('%d', '%s', '%s'>" %(self.id, str(self.datetime), self.string)

这是views.py，我收到导入错误。 'query'，'add'，'commit'，'db_session'这个词成为未定义的变量。

from database import db_session
from database import init_db
from models import TbTest


def show_tables():
    queries = db_session.query(TbTest)
    entries = [dict(id=q.id, datetime=q.datetime, string=q.string) for q in queries]
    print entries

def add_entry(datetime, string):
    t = TbTest(datetime, string)
    db_session.add(t)
    db_session.commit()

def delete_entry(datetime, string):
    db_session.query(TbTest).filter(TbTest.datetime==datetime, TbTest.string==string).delete()
    db_session.commit()

def main():
    add_entry("2015-02-06 09:00:05", "test1")
    delete_entry("2015-02-06 09:00:05","test1")
    db_session.close()

if __name__ == "__main__" :
    main()

编辑01：添加了文件结构

myflask
├── myflask package
├── templates
|   └──index.html
├── __init__.py
├── app.py
├── database.py
├── models.py
└── views.py

Flask：导入错误，未定义的变量导入，db会话

0 个答案: