Question

我有两个Django模型：

class seller_event(models.Model):
    event_id = models.AutoField(primary_key=True)
    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
    title = models.CharField(max_length = 300, default = 'Null')
    description = models.CharField(max_length = 300, default = 'Null')
    location = models.CharField(max_length= 300, default = 'Null')
    cash_payment = models.BooleanField(default=True)
    paytm_payment = models.BooleanField(default=False)

    def __unicode__(self):
        return str(self.event_id)

class seller_event_items(models.Model):
    item_id = models.AutoField(primary_key=True)
    event_id = models.ForeignKey(seller_event)
    item_name = models.CharField(max_length = 300, default = 'Null')
    item_price = models.CharField(max_length = 300, default = 'Null')
    item_quant = models.CharField(max_length = 300, default = 'Null')

    def __unicode__(self):
        return str(self.item_id)

第二个表的外键是第一个表的主键。基本上，我试图将商品与销售相关联。我有这样的表格：

forms.py：

class Seller_event(forms.ModelForm):

    class Meta:
        model = seller_event
        exclude = {'user'}

class Seller_event_items(forms.ModelForm):

    class Meta:
        model = seller_event_items
        exclude = {'event_id'}

views.py：

def newlist(request):
    if request.user.is_authenticated():
        user = request.user
        print user
        if request.method == 'POST':
            seller_event_form = Seller_event(request.POST)
            seller_event_items_form = Seller_event_items(request.POST)
            if seller_event_form.is_valid() and seller_event_items_form.is_valid():
                new_seller_event = seller_event_form.save(commit=False)
                new_seller_event.user = user
                new_seller_event.save()
                seller_event_items_form.save()
                return redirect('/home')

        else:
            seller_event_form = Seller_event()
            seller_event_items_form = Seller_event_items()


        return render(request, 'home/newlist.html', {'seller_event_form': seller_event_form, 'seller_event_items_form': seller_event_items_form})

此处的表单有助于卖家创建销售，然后使用商品填充销售。

如何自动将items表上的fk设置为event_id（sell_events表的pk）？我已将其从表格中排除，但我不确定在此之后该怎么做。

提前致谢！

Answer 1

保存模型时，

在seller_event_items_form.save()之前添加此行你可以把它称为ForeignKey

seller_event_items.event_id = new_seller_event

Answer 2

您的操作方式与您在new_seller_event上设置用户的方式完全相同。

事件与用户之间的关系与项目与事件之间的关系相同。

自动将一个表的主键设置为另一个表的外键？

2 个答案: