Question

我有这个简单的功能来更新现有记录，方法是通过主键以某种形式获取该记录，然后在Django 2.0.1中的数据库中对其进行更新。我能够从数据库中很好地获取数据，但是当我按Submit to POST请求被发送到（[17/Jun/2019 17:59:28] "POST /suppliers/lr/13/ HTTP/1.1" 200 25533）时，但数据库中没有反映出任何变化。这是我的代码：

Views.py

@login_required
@supplier_required
def LrFormView (request, pk):
    lr_object = get_object_or_404(LR, id=pk)  # Or slug=slug
    form = LrForm(data=request.POST or None, instance=lr_object)
    if form.is_valid():
        form.save()  # redirect()
    return render(request, 'classroom/suppliers/print_LR.html', {'form': form})

Forms.py

class LrForm(forms.ModelForm):
  class Meta:
      model = LR


      fields = ('lr_declared', 'ewaybill_no', 'lr_quantity', 'lr_weight', 'lr_invoice_date', 'lr_item_name',
              'lr_consignor_name', 'lr_consignor_address', 'lr_consignor_contact_name',
              'lr_consignor_contact_phone', 'lr_consignee_name', 'lr_consignee_address',
              'lr_consignee_contact_name', 'lr_consignee_contact_phone', 'vehicle_no', 'lr_vehicle_type',
              'driver_name', 'driver_no', 'lr_no', 'lr_date', 'lr_billingparty', 'invoice_no')

models.py：

class LR(models.Model):
    lr_quiz = models.ForeignKey(Quiz, on_delete=models.CASCADE, related_name='quiz_lr')

    lr_no = models.IntegerField(default=0)
    lr_date = models.DateTimeField(max_length=255, default=now)
    lr_billingparty = models.CharField(max_length=255, default=0)  # supplier company name foreign key

    invoice_no = models.IntegerField(default=0)
    lr_declared = models.IntegerField(default=0)
    ewaybill_no = models.IntegerField(default=0)
    lr_quantity = models.IntegerField(default=0)  # quantity
    lr_weight = models.IntegerField(default=0)  # weight

    lr_invoice_date = models.DateTimeField(max_length=255, default=now)

    lr_item_name = models.CharField(max_length=255, default=0)  # said to contain

    lr_consignor_name = models.CharField(max_length=255, default=0)  # shipper company name
    lr_consignor_address = models.CharField(max_length=255, default=0)  # shipper company name
    lr_consignor_contact_name = models.CharField(max_length=255, default=0)  # shipper company name
    lr_consignor_contact_phone = models.CharField(max_length=255, default=0)  # shipper company name

    lr_consignee_name = models.CharField(max_length=255, default=0)  # shipper company name
    lr_consignee_address = models.CharField(max_length=255, default=0)  # shipper company name
    lr_consignee_contact_name = models.CharField(max_length=255, default=0)  # shipper company name
    lr_consignee_contact_phone = models.CharField(max_length=255, default=0)  # shipper company name

    vehicle_no = models.CharField(max_length=255, default=0)
    lr_vehicle_type = models.IntegerField(default=0)
    driver_name = models.CharField(max_length=255, default=0)
    driver_no = models.IntegerField(default=0)

urls.py

path('lr/<int:pk>/', suppliers.LrFormView, name='lr_form'),

我将通过以下按钮转到此页面：

<a href="{% url 'suppliers:lr_form' taken_quiz.quiz_id %}" class="btn btn-primary">Generate LR</a>

我尝试在Internet上查找，并发现了无数使用此方法更新数据库中记录的示例。我无法理解这里出了什么问题。我应该如何调试呢？

无法从数据库更新记录，但能够获取记录？

0 个答案: