变量是未定义的烧瓶mysql

Question

我需要在页面上问候用户。 F.ex：您好 {{ name }}，但我收到错误 UnboundLocalError: local variable 'account' referenced before assignment。下面的代码有什么问题？

python:

app = Flask(__name__)

mysql = MySQL(app)


@app.route('/', methods=['GET', 'POST'])
def index():
    if request.method == 'POST':
        name = request.form['name']
        email = request.form['email']
        cur = mysql.connection.cursor()
        cur.execute('INSERT INTO users(name, email) VALUES(%s, %s)', (name, email))
        mysql.connection.commit()
        cur.close()
        return redirect('profile')

    return render_template('index.html')


@app.route('/profile', methods=['GET'])
def profile():
    if request.method == 'POST':
        name = request.form['name']
        email = request.form['email']
        cur = mysql.connection.cursor()
        cur.execute('SELECT * FROM users')

        account = cur.fetchone()

    return render_template('profile.html', account=account)

index.html:

<form action="" method="POST">
    <span style="color: #fff;">Firstname:</span><input type="text" name="name" placeholder="Type your firstname"><br><br>
    <input type="submit" name="submit" value="submit">
</form>

profile.html

<h4 style="color: #fff;">Your firstname: is {{ account['name'] }}</h4>
<h4 style="color: #fff;">Your email: is {{ account['email'] }}</h4>

我可以连接到数据库并获取用户数据，但在 profile.html 页面上我收到错误 如何解决？请帮忙。

Answer 1

您尚未将帐户传递给模板。

而不是，

return render_template('profile.html')

你需要写成，

return render_template('profile.html', account=account)

编辑：

@app.route('/profile', methods=['GET','POST'])
def profile():
    if request.method == 'POST':
        name = request.form['name']
        email = request.form['email']
        cur = mysql.connection.cursor()
        cur.execute('SELECT * FROM users')

        account = cur.fetchone()

        return render_template('profile.html', account=account)

或者，如果您希望配置文件成为获取请求，您可以这样做

@app.route('/profile', methods=['GET','POST'])
def profile():
    if request.method == 'POST':
        name = request.form['name']
        email = request.form['email']
    cur = mysql.connection.cursor()
    cur.execute('SELECT * FROM users')

    account = cur.fetchone()

    return render_template('profile.html', account=account)