我需要有关此代码的帮助。
每当我运行代码时,我都会遇到以下问题: ProgrammingError:(sqlite3.ProgrammingError)在线程中创建的SQLite对象只能在同一线程中使用。该对象在线程ID 140661091202816中创建,这是线程ID 140661082810112 [SQL:选择country.name AS country_name,country.id AS country_id 来自国家
from flask import Flask
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from database_setup import Base, Country, CountryItem
app = Flask(__name__)
engine = create_engine('sqlite:///countryfood.db')
Base.metadata.bind = engine
DBSession = sessionmaker(bind=engine)
session = DBSession()
@app.route('/')
@app.route('/hello')
def HelloWorld():
country = session.query(Country).first()
items = session.query(CountryItem).filter_by(country_id = country.id)
output = ''
for i in items:
output += str(i.id)
output += ': '
output += i.name
output += '</br>'
return output
if __name__ == '__main__':
app.debug = True
app.run(host='0.0.0.0', port=5000)
国家/地区= session.query(国家/地区).first() items = session.query(CountryItem).filter_by(country_id = country.id)
请帮助!
提前谢谢
这是我的代码:
country = session.query(Country).first()
items = session.query(CountryItem).filter_by(country_id = country.id)