在我的环境项目目录中测试 apps.py，这是我的登录/注册表单脚本：
#app.py
from flask import Flask, request, session, redirect, url_for, render_template, flash
from django.apps import AppConfig
from flask_sqlalchemy import SQLAlchemy
from datetime import datetime
import psycopg2 #pip install psycopg2
import psycopg2.extras
import re
from werkzeug.security import generate_password_hash, check_password_hash
#
class IndexConfig(AppConfig):
default_auto_field = 'django.db.models.BigAutoField'
name = 'index'
#
app = Flask(__name__)
app.secret_key = 'cairocoders-ednalan'
DB_HOST = "localhost"
DB_NAME = "users"
DB_USER = "postgres"
DB_PASS = "admin"
conn = psycopg2.connect(dbname=DB_NAME, user=DB_USER, password=DB_PASS, host=DB_HOST)
@app.route('/')
def home():
# Check if user is loggedin
if 'loggedin' in session:
# User is loggedin show them the home page
return render_template('home.html', username=session['username'])
# User is not loggedin redirect to login page
return redirect(url_for('login'))
@app.route('/login/', methods=['GET', 'POST'])
def login():
cursor = conn.cursor(cursor_factory=psycopg2.extras.DictCursor)
# Check if "username" and "password" POST requests exist (user submitted form)
if request.method == 'POST' and 'username' in request.form and 'password' in request.form:
username = request.form['username']
password = request.form['password']
print(password)
# Check if account exists using MySQL
cursor.execute('SELECT * FROM users WHERE username = %s', (username,))
# Fetch one record and return result
account = cursor.fetchone()
if account:
password_rs = account['password']
print(password_rs)
# If account exists in users table in out database
if check_password_hash(password_rs, password):
# Create session data, we can access this data in other routes
session['loggedin'] = True
session['id'] = account['id']
session['username'] = account['username']
# Redirect to home page
return redirect(url_for('home'))
else:
# Account doesnt exist or username/password incorrect
flash('Incorrect username/password')
else:
# Account doesnt exist or username/password incorrect
flash('Incorrect username/password')
return render_template('login.html')
@app.route('/register', methods=['GET', 'POST'])
def register():
cursor = conn.cursor(cursor_factory=psycopg2.extras.DictCursor)
# Check if "username", "password" and "email" POST requests exist (user submitted form)
if request.method == 'POST' and 'username' in request.form and 'password' in request.form and 'email' in request.form:
# Create variables for easy access
fullname = request.form['fullname']
username = request.form['username']
password = request.form['password']
email = request.form['email']
_hashed_password = generate_password_hash(password)
#Check if account exists using MySQL
cursor.execute('SELECT * FROM users WHERE username = %s', (username,))
account = cursor.fetchone()
print(account)
# If account exists show error and validation checks
if account:
flash('Account already exists!')
elif not re.match(r'[^@]+@[^@]+\.[^@]+', email):
flash('Invalid email address!')
elif not re.match(r'[A-Za-z0-9]+', username):
flash('Username must contain only characters and numbers!')
elif not username or not password or not email:
flash('Please fill out the form!')
else:
# Account doesnt exists and the form data is valid, now insert new account into users table
cursor.execute("INSERT INTO users (fullname, username, password, email) VALUES (%s,%s,%s,%s)", (fullname, username, _hashed_password, email))
conn.commit()
flash('You have successfully registered!')
elif request.method == 'POST':
# Form is empty... (no POST data)
flash('Please fill out the form!')
# Show registration form with message (if any)
return render_template('register.html')
@app.route('/logout')
def logout():
# Remove session data, this will log the user out
session.pop('loggedin', None)
session.pop('id', None)
session.pop('username', None)
# Redirect to login page
return redirect(url_for('login'))
@app.route('/profile')
def profile():
cursor = conn.cursor(cursor_factory=psycopg2.extras.DictCursor)
# Check if user is loggedin
if 'loggedin' in session:
cursor.execute('SELECT * FROM users WHERE id = %s', [session['id']])
account = cursor.fetchone()
# Show the profile page with account info
return render_template('profile.html', account=account)
# User is not loggedin redirect to login page
return redirect(url_for('login'))
if __name__ == "__main__":
app.run(debug=True)这是我在终端中运行“flask run”时收到的错误，根本不知道它是什么意思。
我想要实现的是将 psql 数据库连接到我的网站并使用 Flask 作为 Web 框架
PS C:\Users\sefni\Documents\test_django_app\Environments\testProject> flask run
flask : The term 'flask' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1
+ flask run
+ ~~~~~
+ CategoryInfo : ObjectNotFound: (flask:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
要么你还没有安装
flaskpip install flask
或者您没有正确运行应用程序。你像这样运行（从你的代码所在的目录）：
python -m flask run
您可以使用 app.run() 运行应用程序，如果您需要执行 python app.py
但是如果你希望它使用flask run运行那么你需要设置环境 执行这两个命令。
set FLASK_APP=application.py
set FLASK_DEBUG=1
现在您可以使用以下行运行应用程序
flask run
如果您使用的是 bash，请使用
exportset错误：无法导入“base”。 我尝试了所有选项，但没有任何效果对我来说，请提出任何建议