Question

model 1

class Products(models.Model):
    product_category = models.ForeignKey(ProductCategory)
    product_sub_category =  models.ForeignKey(ProductCategory)
    product_name = models.CharField(max_length = 200)
   is_active = models.BooleanField(default = True)
   and so on...

model 2

class ProductImages(models.Model):
    product = models.ForeignKey( Products )
    product_image = models.FileField(_('Attachment'), upload_to='attachments')
    is_active = models.BooleanField(default = True)

CreateView

class ProductCreate(CreateView):
    model = Products
    template_name = "products/product_add.html"
    fields = ['product_category', 'product_sub_category', 'product_name', 'size', 'color', 'price', 'price_info', 'description_1', 'description_2', 'about_product', 'features', 'specification']
    success_url = "products/product-list"  

    def form_valid(self, form):
        product_form = form.save(commit = False)
        # **expecting product_form.id to be non None**
        if 'product_images' in self.request.FILES:
            for img in self.request.FILES.getlist('product_images'):
                 ProductImages(product = product_form, product_image = img).save()

       super(ProductCreate, self).post(request, *args, **kwargs)

问题陈述：
form.save（commit = False）返回Product实例但产品ID为None。期望对象id是非法的，因为对象尚未保存到db？

Answer 1

是。 id由数据库分配，并且由于commut=False明确表示“不发送到db”，因此它不具有id。

form.save（commit = False）不返回实例ID

1 个答案: