Python 我的modelformset_工厂不是保存图像(我使用了基于类的视图),而是在使用管理端时保存图像
我面临的挑战是,在创建新产品时不保存图像。表单呈现良好,图像已上载,但从未保存,直到我使用管理员上载并保存它时,它才会显示在我创建的产品上 我想我的类Python 我的modelformset_工厂不是保存图像(我使用了基于类的视图),而是在使用管理端时保存图像,python,django,django-forms,django-templates,django-views,Python,Django,Django Forms,Django Templates,Django Views,我面临的挑战是,在创建新产品时不保存图像。表单呈现良好,图像已上载,但从未保存,直到我使用管理员上载并保存它时,它才会显示在我创建的产品上 我想我的类ProductCreateView()在views.py中缺少了一些东西,特别是在def post()中。 帮我弄清楚 型号.py def product_download(instance, filename): return '%s/%s' %(instance.product.slug, filename) class ProductI
ProductCreateView()
在views.py中缺少了一些东西,特别是在def post()
中。
帮我弄清楚
型号.py
def product_download(instance, filename):
return '%s/%s' %(instance.product.slug, filename)
class ProductImages(models.Model):
product = models.ForeignKey(Product)
title = models.CharField(max_length=120)
media = models.ImageField(upload_to=product_download,
width_field='max_width',
height_field='max_height',
null=True, blank=True)
max_width = models.CharField(max_length=100, null=True, blank=True)
max_height = models.CharField(max_length=100, null=True, blank=True)
featured_image = models.BooleanField(default=True)
timestamp = models.DateTimeField(auto_now_add=True, auto_now=False)
updated = models.DateTimeField(auto_now_add=False, auto_now=True)
def __unicode__(self):
return unicode(self.media)
视图.py
def product_download(instance, filename):
return '%s/%s' %(instance.product.slug, filename)
class ProductImages(models.Model):
product = models.ForeignKey(Product)
title = models.CharField(max_length=120)
media = models.ImageField(upload_to=product_download,
width_field='max_width',
height_field='max_height',
null=True, blank=True)
max_width = models.CharField(max_length=100, null=True, blank=True)
max_height = models.CharField(max_length=100, null=True, blank=True)
featured_image = models.BooleanField(default=True)
timestamp = models.DateTimeField(auto_now_add=True, auto_now=False)
updated = models.DateTimeField(auto_now_add=False, auto_now=True)
def __unicode__(self):
return unicode(self.media)
表单很好地保存了它的信息,但是formset没有保存图像
from .forms import ProductModelForm, ProductImagesForm, ImagesFormset
class ProductCreateView(CreateView):
def form_invalid(self, form, formset):
return self.render_to_response(self.get_context_data(form=form, formset=formset))
def form_valid(self, form, formset):
return HttpResponseRedirect(self.get_success_url())
def get(self, *args, **kwargs):
self.object = None
form_class = self.get_form_class()
form = self.get_form(form_class)
formset = ImagesFormset(queryset=ProductImages.objects.none())
return self.render_to_response(self.get_context_data(form=form, formset=formset))
def post(self, request, *args, **kwargs):
self.object = None
form_class = self.get_form_class()
form = self.get_form(form_class)
formset = ImagesFormset(self.request.POST, self.request.FILES)
form_valid = form.is_valid()
formset_valid = formset.is_valid()
if form_valid and formset_valid:
user = self.request.user
form.instance.user = user
self.object = form.save()
media = formset.save(commit=False)
for img in media:
if hasattr(self.model, 'product'):
img.save()
formset = self.object
formset.save()
return self.form_valid(form, formset)
else:
return self.form_invalid(form, formset)
forms.py
class ProductImagesForm(forms.ModelForm):
media = forms.ImageField(label='Image')
featured_image = forms.BooleanField(initial=True)
def __init__ (self, *args, **kwargs):
super(ProductImages, self).__init__(*args, **kwargs)
self.fields['featured_image'] = forms.BooleanField( widget = forms.RadioSelect(attrs={'checked': 'true'}, choices=((self.prefix, 'featured'),)))
def add_prefix(self, field):
if field == 'featured_image': return field
else: return self.prefix and ('%s-%s' % (self.prefix, field)) or field
class Meta:
model = ProductImages
fields = ['media', 'featured_image', ]
ImagesFormset = modelformset_factory(ProductImages, fields=('media', 'featured_image'), extra=1, max_num=4)
模板
<form enctype="multipart/form-data" action="" method="POST"> {% csrf_token %}
{{ form.as_p }}
{{ formset.management_form }}
<div class="link-formset">
{{ formset .as_p }}
</div>
</form>
{%csrf\u令牌%}
{{form.as_p}}
{{formset.management_form}
{{formset.as_p}}
如果这个答案是错的,请原谅我的错误
我认为错误就在这里
for img in media:
img.product = self.object
img.save()
#why assigning formset to self.object? , try removing this.
#self.object is form.save(), ie, already saved.
#formset = self.object
经过长时间的阅读,我终于找到了缺失的部分,通过将图像与产品关联起来,并将其保存并很好地生成图像
if form_valid and formset_valid:
seller = self.get_account()
form.instance.seller = seller
self.object = form.save()
media = formset.save(commit=False)
for img in media:
img.product = self.object
img.save()
formset.save()
这样更简单,只需将其与产品关联即可解决问题
if form_valid and formset_valid:
seller = self.get_account()
form.instance.seller = seller
self.object = form.save()
media = formset.save(commit=False)
for img in media:
img.product = self.object
img.save()
formset.save()
我不明白你在
如果有效的话块中做什么。据我所知,您从未设置过self.model
,因此您将永远无法访问img.save()
。那么formset=self.object
的意义是什么呢?填充缺失片段的最佳方法是什么?但是这会产生一个例外。RelatedObjects不在/seller/products/add/ProductImages的文本列表中没有产品。有什么例外吗?RelatedObjects不在/seller/products/add/ProductImages的文本列表中没有产品。self.object是所谓的产品对象吗?是的,它是相关对象