python - 尝试 except 在函数内部不起作用，但在外部起作用

Question

try except 作为 DRY 的一部分，我试图将块放在我的函数之外。如果我将它直接放入函数中它可以工作

@api_view(["GET", "POST"])
def user_info(request):
    if request.method == "GET":
        username = request.GET.get("username")
        password = request.GET.get("password")

    try:
        Account.objects.get(username=username, password=password)
    except Account.DoesNotExist:
        return JsonResponse({
            "success": "false",
            "error_code": "1",
        })

但如果我让它发挥作用user_check，它就不起作用

@api_view(["GET", "POST"])
def user_info(request):
    if request.method == "GET":
        username = request.GET.get("username")
        password = request.GET.get("password")

        user_check(username,password)

def user_check(username,password):
    try:
        Account.objects.get(username=username, password=password)
    except Account.DoesNotExist:
        return JsonResponse({
            "success": "false",
            "error_code": "1",
        })

标签： pythondjangodjango-rest-frameworktry-catch

Answer 1

也从 try 块返回。喜欢：

def user_check(username,password):
    try:
        Account.objects.get(username=username, password=password)
        # Add this line
        return True
    except Account.DoesNotExist:
        return JsonResponse({
            "success": "false",
            "error_code": "1",
        })

而且，您的功能可能是：

@api_view(["GET", "POST"])
def user_info(request):
    if request.method == "GET":
        username = request.GET.get("username")
        password = request.GET.get("password")

        data = user_check(username, password)
        if data==True:
            # executed from try block known