我有一些关于视图中表单的问题,我创建了CBV CreateView。它运行良好并保存了表单,但是我出现了错误:“ProductForm”对象没有属性“save_m2m”,如果我不使用form.save_m2m,则不会将图像添加到我的产品中,但会将其添加到媒体中。
所以这里我们有model.py
class Product(models.Model):
class Meta:
verbose_name = 'Продукт'
verbose_name_plural = 'Продукты'
shop = models.ForeignKey(Shop, verbose_name='Название магазина')
category = models.ForeignKey(Category, verbose_name='Название категории')
title = models.CharField(max_length=255, verbose_name='Название товара')
slug = models.SlugField(_("Название на транслите"), max_length=50, unique=True, blank=True, null=True)
price = models.DecimalField(null=True, blank=True, verbose_name='Цена', decimal_places=0, max_digits=10)
sell_count = models.PositiveIntegerField(_("Количество продаж"), default=0, null=True, blank=True)
discount = models.PositiveIntegerField(null=True, blank=True, verbose_name='Скидка')
currency = models.CharField(null=True, max_length=255, verbose_name='Валюта', default='сом')
quantity = models.IntegerField(verbose_name='Количество', default=0)
delivery_type = models.CharField(verbose_name='Вид доставки', choices=DELIVERY_TYPES, default='self',
max_length=255)
delivery_cost = models.FloatField(verbose_name='Стоимость доставки', default=0, null=True, blank=True)
# settings = models.ManyToManyField('ProductSettings', verbose_name='Характеристика')
availability = models.CharField(_("Наличие"), max_length=100, choices=AVAILABILITY_TYPES, default='available')
published = models.BooleanField(default=True)
short_description = models.TextField(max_length=300, null=True, blank=True,
verbose_name='Короткое описание товара до 300 символов')
long_description = RichTextUploadingField(null=True, blank=True, verbose_name='Полное описание')
images = models.ManyToManyField('Media', verbose_name='Изображения продукта', blank=True)
objects = ProductPublishedManager()
class Media(models.Model):
class Meta:
verbose_name = "Изображение"
verbose_name_plural = "Изображения"
image = models.ImageField(upload_to='images')
这里有一个forms.py文件。
class ProductForm(forms.ModelForm):
class Meta:
model = Product
exclude = ['slug', 'objects', 'sell_count']
removed_images = forms.CharField(required=False)
uploaded_images = forms.CharField(required=False)
def __init__(self, *args, **kwargs):
self.user = kwargs['initial']['user']
super(ProductForm, self).__init__(*args, **kwargs)
self.fields['shop'].queryset = Shop.objects.filter(user__in=[self.user.id])
for field in iter(self.fields):
self.fields[field].widget.attrs.update({
'class': 'form-control'
})
这里是views.py文件。
class ProductCreateView(LoginRequiredMixin, AddProductMixin, CreateView):
form_class = ProductForm
template_name = 'product/product_form.html'
def get_success_url(self):
return reverse('shops:detail', args=(self.object.shop.slug,))
def get_initial(self):
return {'shop': Shop.objects.get(slug=self.kwargs['slug']),
'user': self.request.user
}
def form_valid(self, form, **kwargs):
product = form.instance
product.slug = slugify(form.instance.title)
product.shop = Shop.objects.get(slug=self.kwargs['slug'])
form.save()
if form.cleaned_data['uploaded_images']:
if ',' in form.cleaned_data['uploaded_images']:
for item in form.cleaned_data['uploaded_images'].split(','):
try:
media = Media.objects.get(id=int(item))
product.images.add(media)
except ObjectDoesNotExist:
pass
else:
try:
media = Media.objects.get(id=int(form.cleaned_data['uploaded_images']))
product.images.add(media)
except ObjectDoesNotExist:
print('error')
form.save_m2m()
if form.cleaned_data['removed_images']:
for item in form.cleaned_data['removed_images'].split(','):
try:
media = Media.objects.get(id=int(item))
image_path = MEDIA_ROOT + '/' + media.image.name
os.remove(image_path)
media.delete()
except ObjectDoesNotExist:
pass
return super(ProductCreateView, self).form_valid(form)
commit=False
。只有在调用form.save(commit=False)
时,Django才会添加save_m2m
属性... - Raja Simonobj = form.save(commit=False)
然后执行obj.save()
再执行form.save_m2m()
。 - Raja Simonsave_m2m()仅在使用save(commit=False)时才需要
的内容。当您在表单上使用简单的save()时,所有数据 - 包括多对多数据 - 都将被保存,无需任何附加的方法调用。 - Raja Simon