Question

我在制作动态URI时遇到困难，我必须传递参数。当我尝试传递一个参数时，我收到了类型错误消息。它一直说我通过了0个参数。我无法找到问题。

这是views.py

@app.route('/delete_todo/<int:todo_id>', methods=['POST'])
@login_required
def delete_todo(todo_id):
    if request.form['todo_id']:
        g.db.execute('''delete * from todo where todo_id = ?''',   request.form['todo_id'])
        g.db.commit()
        flash('Your message was deleted')
    return redirect(url_for('index'))

模板应该传递参数

{% for todo in todo %}    
<form action="{{ url_for('delete_todo', todo_id=todo.todo_id) }}" method="post">
        <input type="hidden" name="todo_id" value="{{ todo.todo_id }}">
        <input type="submit" value="Delete">
 </form>
{% else %}  
{% endfor %}

这是错误消息。

TypeError
TypeError: _wrapped_view() takes at least 1 argument (0 given)

Traceback (most recent call last)
File "C:\Python27\lib\site-packages\flask\app.py", line 1994, in __call__
return self.wsgi_app(environ, start_response)
File "C:\Python27\lib\site-packages\flask\app.py", line 1985, in wsgi_app
response = self.handle_exception(e)
File "C:\Python27\lib\site-packages\flask\app.py", line 1540, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:\Python27\lib\site-packages\flask\app.py", line 1982, in wsgi_app
response = self.full_dispatch_request()
File "C:\Python27\lib\site-packages\flask\app.py", line 1614, in  full_dispatch_request
rv = self.handle_user_exception(e)
File "C:\Python27\lib\site-packages\flask\app.py", line 1517, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "C:\Python27\lib\site-packages\flask\app.py", line 1612, in full_dispatch_request
rv = self.dispatch_request()
File "C:\Python27\lib\site-packages\flask\app.py", line 1598, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
TypeError: _wrapped_view() takes at least 1 argument (0 given)
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Answer 1

todo_id已经按表单发送，因此您无需在url中将其作为参数发送。另外不要忘记将字符串todo_id转换为int

@app.route('/delete_todo', methods=['POST'])
@login_required
def delete_todo():
    if request.form['todo_id']:
        g.db.execute('''delete * from todo where todo_id = ?''',int(request.form['todo_id']))
        g.db.commit()
        flash('Your message was deleted')
    return redirect(url_for('index'))

Flask：TypeError，不能传递参数

1 个答案: