我正在关注 Flaskr 教程（http://flask.pocoo.org/docs/tutorial/setup/）并且误解了一件事：
我所做的应用程序和来自 github ( https://github.com/mitsuhiko/flask/tree/master/examples/flaskr/ )的原始 Flaskr 都可以正常工作，但是我没有看到任何创建的数据库文件，即使我手动创建'/tm/flaskr.db'，这个文件还是空的。
拜托，你能解释一下，sqlite3在什么神奇的地方保存数据？
这是我执行的 py 文件：
# coding: utf-8
import sqlite3
import inspect
from flask import Flask, request, session, g, redirect, url_for, abort, render_template, flash
from contextlib import closing
app = Flask(__name__)
app.config.from_object('config')
def connect_db():
return sqlite3.connect(app.config['DATABASE'])
def init_db():
with closing(connect_db()) as db:
with app.open_resource('schema.sql') as f:
db.cursor().executescript(f.read())
db.commit()
@app.before_request
def before_request():
g.db = connect_db()
@app.teardown_request
def teardown_request(exception):
g.db.close()
@app.route('/')
def show_entries():
cur = g.db.execute('select title, text from entries order by id desc')
entries = [dict(title=row[0], text=row[1]) for row in cur.fetchall()]
return render_template('show_entries.html', entries=entries)
@app.route('/add', methods=['POST'])
def add_entry():
if not session.get('logged_in'):
abort(401)
g.db.execute('insert into entries (title, text) values (?, ?)',
[request.form['title'], request.form['text']])
g.db.commit()
flash('New entry was successfully posted')
return redirect(url_for('show_entries'))
@app.route('/login', methods=['GET', 'POST'])
def login():
error = None
if request.method == 'POST':
if request.form['username'] != app.config['USERNAME']:
error = 'Invalid username'
elif request.form['password'] != app.config['PASSWORD']:
error = 'Invalid password'
else:
session['logged_in'] = True
flash('You were logged in')
return redirect(url_for('show_entries'))
return render_template('login.html', error=error)
@app.route('/logout')
def logout():
session.pop('logged_in', None)
flash('You were logged out')
return redirect(url_for('show_entries'))
if __name__ == '__main__':
app.run()
这是配置文件：
# coding: utf-8
DATABASE = '/tmp/site.db'
DEBUG = True
SECRET_KEY = 'dev_key'
USERNAME = 'admin'
PASSWORD = 'pass'
架构.sql
drop table if exists entries;
create table entries (
id integer primary key autoincrement,
title string not null,
text string not null
);
非常感谢您的回答，我注意到，db 是在文件系统根目录的“/tmp/”文件夹中创建的。我预计，它将像在 django 中使用 sqlite 一样在我的项目文件夹中创建。