在Flask微型框架中使用WTForms的populate_obj（）方法

<form method=\"post\">
    <table>
        <tr>
            <td>Username:</td>
            <td>{{user[\'username\']}}</td>
        </tr>
        <tr>
            <td>New Password:</td>
            <td> <input type=\"password\" name=\"password\"></td>
            <td>{% if form.password.errors %} {{form.password.errors}} {% endif %}<td>
        </tr>
        <tr>
            <td>Re-enter Password:</td>
            <td> <input type=\"password\" name=\"confirm_password\">
            </td>
        </tr>
        <input type=\'hidden\' name=\'username\' value=\"{{user[\'username\']}}\">
        <tr>
            <td><input type=\"submit\" value=\"Submit\"></td>
        </tr>
    </table>
</form>

def edit():
    username = request.args.get(\'user\')
    user = User.find_one({\'username\':username}) # Is this a correct way of doing it?
    form = UserForm(**what should be placed here?**, obj=user)

    if request.method == \'POST\' and form.validate():
        form.populate_obj(user)
        user.save()
        return \'updated\'
    return render_template(\'edituser.html\', form=form, user=user)