Question

所以我一直在使用会话将数据从一个装饰器传递到另一个装饰器。但是现在每次我创建一个新的会话变量时，我都会在页面之间得到一个KeyError。意思是，我的第三页到第四页有一个会话错误;但我有同样的问题从我的第二页到第三页添加一个新的会话变量，即使我有四个其他会话变量给我没有错误。

我的代码与下面发布的@laila相似：

from flask import Flask, render_template
from flask import request, session, url_for,abort,redirect

app = Flask(__name__)

app.config['SECRET_KEY'] = 'secret'


@app.route('/'):
def first():
    session['this_one']='hello'
    render('template.html')

@app.route('/second')
def second():
   it=session['this_one']
    render('other_page.html')

if __name__ == '__main__':
    app.run(debug=True)

Answer 1

似乎代码有一些语法错误。请尝试下面的代码，它应该没问题：

<table id="keywords" class="container">
    <thead>
        <tr> 
          <td><span>Project</span></td>
            <td><span>No</span></td>
          <td><span>Sub ID</span></td>
          <td><span>Name</span></td>
          <td><span>Requested Amount</span></td>
          <td><span>Paid Amount</span></td>
          <td><span>Amount To be Paid</span></td> 
          <td><span>Description</span></td>
          <td><span>State</span></td>    
        </tr>
    </thead>
<?php

/* showing table */

                $sql = "SELECT * FROM memo ORDER BY No DESC, SubID ASC"
                    or die("Failed to query database" .mysqli_error());
                $result = $link->query($sql);    

                while ($row = $result->fetch_assoc()) {

                    print "<tr>"; 
                    print "<td ><a href=\"Project.php?Project={$row['Project']}\">"  . $row['Project'] . "</a></td>";
                    print "<td ><a href=\"PaymentVoucher.php?No={$row['No']}\">"  . $row['No'] . "</a></td>";
                    print "<td >" . $row['SubID'] . "</td>";
                    print "<td ><a href=\"Name.php?Name={$row['Name']}\">"  . $row['Name'] . "</a></td>";
                    print "<th >" . $row['RequestAmount'] . "</th>";
                    print "<th >" . $row['PaidAmount'] . "</th>";
                    print "<th >" . $row['AmountToPay'] . "</th>";
                    print "<td >" . $row['Description'] . "</td>";
                    print "<td >" . $row['State'] . "</td>";
                    print "</tr>"; 

                    }
                    // print "</table>"; 

?> 
</table>

Flask会话中的关键错误

1 个答案: