我在ubuntu服务器上创建了一个烧瓶api。我的代码在本机上运行（没有apache），但为什么要部署它我得到OperationalError：（sqlite3.OperationalError）无法打开数据库文件。
代码：
home.py
from flask import Flask,jsonify, request
from models import UsersLoginInfo,Base
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship, sessionmaker
from sqlalchemy import create_engine
import sqlalchemy.pool
sqlite = sqlalchemy.pool.manage(sqlite3, poolclass=sqlalchemy.pool.SingletonThreadPool)
engine = sqlite.create_engine('sqlite:///database/userslogininfo.db')
Base.metadata.bind = engine
DBSession = sessionmaker(bind=engine)
session = DBSession()
app=Flask(__name__)
@app.route('/login',methods=['POST'])
def home():
data_rec = {'username' : request.json['username'], 'password' : request.json['password']}
users = [i.serialize['username'] for i in session.query(UsersLoginInfo).all()]
passwords = [i.serialize['password'] for i in session.query(UsersLoginInfo).all()]
login=False
try:
user_index=users.index(unicode(data_rec['username']))
password_from_db=passwords[user_index]
if password_from_db==data_rec['password']:
login=True
msg=None
else:
msg="Wrong password entered."
except ValueError:
msg="There is no user with that username, please create an account."
return jsonify({'login' : login ,"msg": msg})
@app.route('/create',methods=['POST'])
def create():
data_rec = {'username' : request.json['username'], 'password' : request.json['password']}
users = [i.serialize['username'] for i in session.query(UsersLoginInfo).all()]
if data_rec['username'] in users: #check account exists
account_exists=True
msg="An account with that username already exists, please choose another username."
else:
account_exists=False
id=len(users)
user = UsersLoginInfo(username = unicode(data_rec['username']), password = unicode(data_rec['password']), id = id)
session.add(user)
session.commit()
msg="Your account has been created. Please login with it."
return jsonify({'account_exists' : account_exists ,"msg": msg})
if __name__ == "__main__":
app.run()
models.py
# -*- coding: utf-8 -*-
from sqlalchemy import Column,Integer,String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import relationship, sessionmaker
from sqlalchemy import create_engine
Base = declarative_base()
class UsersLoginInfo(Base):
__tablename__ = 'userslogininfo'
id = Column(Integer, primary_key = True)
username = Column(String)
password = Column(String)
#Add a property decorator to serialize information from this database
@property
def serialize(self):
return {
'username': self.username,
'password': self.password,
}
engine = create_engine('sqlite:///database/userslogininfo.db')
Base.metadata.create_all(engine)
FlaskApps.wsgi
import sys
import logging
logging.basicConfig(stream=sys.stderr)
sys.path.insert(0,"/var/www/FlaskApps/notepad_app/")
print "hello"
# home points to the home.py file
from home import app as application
application.secret_key = "somesecretses212sionkey"
错误（来自/var/log/apache2/error.log）：
调试：
运行apache的用户是www-data。
ubuntu@ip-171-31-38-0:/var/www/FlaskApps$ ls
FlaskApps.wsgi notepad_app
ubuntu@ip-171-31-38-0:/var/www/FlaskApps$ tree
.
├── FlaskApps.wsgi
└── notepad_app
├── clean_log.sh
├── database
├── home.py
├── home.pyc
├── models.py
├── models.pyc
├── print_log.sh
├── README.md
└── restart.sh
2 directories, 9 files
ubuntu@ip-171-31-38-0:/var/www/FlaskApps$
必须在上面的数据库文件夹中创建数据库。
ubuntu@ip-171-31-38-0:/var/www/FlaskApps/notepad_app$ ls -ld database/
drwxrwxrwx 2 www-data www-data 4096 Mar 13 21:31 database/
当我从python解释器运行home.py时，它可以正常工作并在数据库文件夹中创建.db
ubuntu@ip-171-31-38-0:/var/www/FlaskApps/notepad_app$ python home.py
* Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
* Restarting with stat
* Debugger is active!
* Debugger pin code: 312-927-730
ubuntu@ip-171-31-38-0:/var/www/FlaskApps/notepad_app$ ls database/
userslogininfo.db