Python Django应用程序赢得'；t在服务器上保存新数据（URL）

当我在本地启动应用程序时，它可以正常工作。该应用程序只需提交新链接并更新产品的价格。这是应用程序从本地到服务器的链接。我需要更换服务器吗

也许我在保存选项上做错了

**this is the views.py code:**

form = AddLinkForm(request.POST or None)
if request.method == 'POST':
    try:
        if form.is_valid():
            form.save()
    except AttributeError:
        error = "Uopa...ne mogu dohvatit ime ili cijenu"
    except:
        error = "Uopa...nesto je poslo po krivu"
form = AddLinkForm()
qs = Link.objects.all()
items_no = qs.count()

if items_no > 0:
    discount_list = []
    for item in qs:
        if item.old_price > item.current_price:
            discount_list.append(item)
        no_discounted = len(discount_list)

context = {
    'qs' : qs,
    'items_no' : items_no,
    'no_discounted' : no_discounted,
    'form' : form,
    'error' : error,
}
return render(request, 'links/main.html', context)


**and this is the models.py** 

**this is the views.py code:**

form = AddLinkForm(request.POST or None)
if request.method == 'POST':
    try:
        if form.is_valid():
            form.save()
    except AttributeError:
        error = "Uopa...ne mogu dohvatit ime ili cijenu"
    except:
        error = "Uopa...nesto je poslo po krivu"
form = AddLinkForm()
qs = Link.objects.all()
items_no = qs.count()

if items_no > 0:
    discount_list = []
    for item in qs:
        if item.old_price > item.current_price:
            discount_list.append(item)
        no_discounted = len(discount_list)

context = {
    'qs' : qs,
    'items_no' : items_no,
    'no_discounted' : no_discounted,
    'form' : form,
    'error' : error,
}
return render(request, 'links/main.html', context)


**and this is the models.py** 

def __str__(self):
    return str(self.name)

class Meta:
    ordering = ('price_difference', '-created')

def save(self, *args, **kwargs):
    name, price = get_link_data(self.url)
    old_price = self.current_price
    if self.current_price:
        if price != old_price:
            diff = float(price) - float(old_price)
            self.price_difference = round(diff, 2)
            self.old_price = old_price
            self.current_price = price
    else:
        self.old_price = 0
        self.price_difference = 0


    self.name = name
    self.current_price = price
    super().save(*args, **kwargs)