Question

我正在使用Flask建立一个网站。下面显示了app.py，html模板和db（postgresql）数据。点击URL http://127.0.0.1:5000/时，我们可以输入用户名和电子邮件。 http://127.0.0.1:5000/users将显示在db中更新的内容，这里是Mak mak@mk.com。

app.py

from flask import Flask, render_template,request, redirect, url_for
from flask_sqlalchemy import SQLAlchemy
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 
'postgres://postgres:123@localhost/sample'
db = SQLAlchemy(app)
class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(80))
    email = db.Column(db.String(100), unique = True)
    def __init__(self, username, email):
        self.username = username
        self.email = email
    def __repr__(self):
        return '<User %r>' %self.username
@app.route('/')
#def index():
def index():
    return render_template('add_user.html')
@app.route('/post_user', methods=['POST'])
def post_user():
    user = User(request.form['username'], request.form['email'])
    db.session.add(user)
    db.session.commit()
    return redirect(url_for('index'))
@app.route('/users')
def get_users():
    users = User.query.all()
    return render_template('get_user.html', user = users)
@app.route('/homepage')
def display_homepage():
    return 'Display homepage'
if __name__ =='__main__':
    app.run()

get_user.html

{% for singleuser in users %}
  <ul>
<li>singleuser.username</li>
</ul>
{% endfor %}

Sql模式详细信息 1个“ Mak”“ mak@mak.com”

Answer 1

在get_users ()中，return语句中有错字

return render_template('get_user.html', users = users)

数据库已更新，但api未在Flask中显示任何内容

1 个答案: