request.post 变量总是返回为空

Question

所以我试图查看用户是否匹配他们的旧密码，如果他们不匹配，那么它会给出一条消息说“你的旧密码不正确”但是如果他们匹配他们的旧密码，那么它应该检查用户是否匹配新的并确认密码正确，如果他们没有，那么它应该给出一条消息说“你的新密码不匹配”，但如果他们的密码是空的，它应该说“你的新密码是空的，但是即使我的密码不是空的，它总是说我密码是空的。我也尝试过if new_password1 or new_password2 == ''但这也有相同的结果。

视图.py

@login_required
def userchange(request):
    if request.method == 'POST':
        user = request.user
        old_password = request.POST['Old password']
        new_password1 = request.POST['New password1']
        new_password2 = request.POST['New password2']
        if user.check_password(old_password):
            if new_password1 == new_password2:
                if new_password1 or new_password2 is None:
                    return render(request, 'main/change.html', {'error':'Your new passwords are empty!'})
                else:
                    user.set_password(new_password1)
                return render(request, 'main/change.html', {'error':'Your password has been changed succesfully!'})
            else:
                return render(request, 'main/change.html', {'error':'Your new passwords do not match'})
        else:
            return render(request, 'main/change.html', {'error':'Your old password is incorrect'})
    elif request.method == "GET":
        return render(request, 'main/change.html')

更改.html

<h1>Note: You will be logged out</h1>
<h2>{{ error }}</h2>
<form method="POST">
    {% csrf_token %}
    <input type="password" placeholder="Old password" name="Old password">
    <input type="password" placeholder="New password" name="New password1">
    <input type="password" placeholder="Confirm password" name="New password2">
    <button type="submit">Change password</button>
</form>

Answer 1

你需要改变

if new_password1 or new_password2 is None:

至

if new_password1 is None or new_password2 is None:

如果new_password1是任何真实值...它将评估new_password1 or new_password2 is None ：因为True or new_password2 is None ...这显然是 True...（您也可能== ''而不是is None ）