Question

我无法从视图访问deposit()类中的Account方法。给我错误：deposit() missing 1 required positional argument: 'amount' 我用以下方法调用该方法：

Account.deposit(amount)

观看次数：

    def home(request):
        return render(request, 'automatedbankteller/home.html')

    def about(request):
        return render(request, 'automatedbankteller/about.html')

    @login_required
    def transactions(request):
        context = {
            'transactions': Transaction.objects.filter(sender=request.user)
        }
        return render(request, 'automatedbankteller/transactions.html', context)

    @login_required
    def my_accounts(request):
        context = {
            'accounts': Account.objects.filter(account_owner=request.user)
        }
        return render(request, 'automatedbankteller/my_accounts.html', context)

    @login_required
    def deposit(request):
        if request.method == 'POST':
            form = UserDepositForm(request.POST)
            if form.is_valid():
                amount = request.POST['amount']
                print(amount)
                Account.deposit(amount)
                #form.save()
                messages.success(request, f'The amount has been deposited into your account!')
                return redirect('ABT-my_accounts')
        else:
            form = UserDepositForm(instance=request.user)

        return render(request, 'automatedbankteller/deposit.html', {'form': form})

型号：

    class Account(models.Model):
       ACCOUNT_TYPES = (
        ('SA', 'Savings'),
        ('CA', 'Checking'),
    )
        accountID = models.IntegerField()
        account_amount = models.DecimalField(max_digits=20, decimal_places=2)
        account_type = models.CharField(max_length=2, choices=ACCOUNT_TYPES)
        account_owner = models.ForeignKey(User, on_delete=models.CASCADE)

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

    def get_balance(self):
        return self.account_amount

    def deposit(self, amount):
        self.account_amount = self.account_amount + amount
        return

    def withdraw(self, amount):
        self.account_amount = self.account_amount - amount
        return

网址：

    urlpatterns = [
        path('', views.home, name='ABT-home'),
        path('about/', views.about, name='ABT-about'),
        path('my_accounts/', views.my_accounts, name='ABT-my_accounts'),
        path('account_history/', views.transactions, name='ABT-transactions'),
        path('deposit/', views.deposit, name='ABT-deposit'),
    ]

表格：


    class UserDepositForm(forms.ModelForm):
        amount = forms.DecimalField(max_digits=20, decimal_places=2)

        class Meta:
            model = Account
            fields = ['account_type', 'amount']

Answer 1

Account.deposit（amount）这里的帐户是class。您需要在此类的实例上调用deposit方法。

account = Account.objects.get(id=1)
account.deposit(amount)

Answer 2

您的Account需要两个参数-类实例和数量。因此，您需要首先创建一个save()实例，然后使用该方法。另外，由于您不返回更新的金额，因此可以在方法本身内部调用class Account(models.Model): ... def deposit(self, amount): self.account_amount = self.account_amount + amount self.save() return方法。

deposit

您需要先在实例上调用# views.py @login_required def deposit(request): if request.method == 'POST': form = UserDepositForm(request.POST) if form.is_valid(): amount = request.POST['amount'] print(amount) account = form.save(commit=False) #no commit in DB account.deposit(amount) # use class instance messages.success(request, f'The amount has been deposited into your account!') return redirect('ABT-my_accounts') else: form = UserDepositForm(instance=request.user) return render(request, 'automatedbankteller/deposit.html', {'form': form})。

deposit

您还可以通过save()方法返回更新后的金额，但是您将需要自己致电{{1}}。

django deposit（）缺少1个必需的位置参数：'amount'

2 个答案: