Django formset UpdateView不會讓我上傳文件

Question

我試圖用多個內聯formset創建一個UpdateView視圖。它工作得很好，因爲我可以添加或刪除文件和圖像，但出於某種原因，它不會接受任何文件/圖像。例如，如果我在發佈中添加第二個文件並上載文件，它將返回一個form_invalid函數，指出FileField旁邊需要此字段。與圖像相同的東西 - 我不能添加任何新圖像，或者我甚至不能將任何圖像更改爲另一個文件，因爲它會說這個字段是必需的。除此之外，我可以更改所有的出版物字段，也可以更改文件的標題，說明和版本，並且可以正確保存，但是當我添加新的文件/圖像或只更改它使用的文件時，不做任何事情，它只會返回一個無效的表單函數。

models.py

class Publication(models.Model): 
    title = models.CharField('Tytul', max_length=100) 
    author = models.ForeignKey(User, verbose_name=('Author'), blank=True, default=0) 
    pub_date = models.DateTimeField('Data publikacji', default=datetime.now) 
    mod_date = models.DateTimeField('Data ostatniej modyfikacji', default=datetime.now) 
    description = models.CharField('Opis', max_length=450) 
    slug = models.SlugField(max_length=40, unique=True) 
    category = models.ForeignKey(Category, verbose_name=('Kategoria'), default=0, related_name='publication') 
    video = EmbedVideoField(blank=True) 

class File(models.Model): 
    title = models.CharField('Tytul', max_length=100) 
    version = models.CharField(verbose_name=u"Wersja", max_length=100) 
    author = models.ForeignKey(User, verbose_name=('Author'), blank=True, default=0) 
    pub_date = models.DateTimeField('Data publikacji', default=datetime.now) 
    mod_date = models.DateTimeField('Data ostatniej modyfikacji', default=datetime.now) 
    description = models.CharField('Opis', max_length=450) 
    downloads = models.IntegerField(default=0) 
    physicalfile = models.FileField('Wrzuc plik', upload_to=randomfilenames, validators=[validate_extension]) 
    publicationfk = models.ForeignKey(Publication,on_delete=models.CASCADE, related_name='files') 


class Image(models.Model): 
    publication = models.ForeignKey(Publication, related_name='images') 
    image = VersatileImageField('Wrzuc obrazek') 

forms.py

class FileForm(forms.ModelForm): 
    class Meta: 
     model = File 
     fields = ['title', 'version', 'description', 'physicalfile',] 

class ImgForm(forms.ModelForm): 
    class Meta: 
     model = Image 
     fields = ['image',] 

class PublicationForm(forms.ModelForm): 
    class Meta: 
     model = Publication 
     fields = ['title', 'description', 'slug', 'category',] 

fileformset = inlineformset_factory(Publication, File, form=FileForm, exclude=[],can_delete=True, extra=1) 
imageformset = inlineformset_factory(Publication, Image, form=ImgForm, can_delete=True, exclude=[], extra=1) 

views.py

class PublicationEdit(UpdateView): 
    model = Publication 
    form_class = PublicationForm 
    template_name = 'mods/pubedit.html' 

    def get_success_url(self): 
     self.success_url = reverse('mods:publicationview', args=(self.object.id,)) 
     return self.success_url 

    def get_context_data(self, **kwargs): 
     context = super(PublicationEdit, self).get_context_data(**kwargs) 
     if self.request.POST: 
      context['pubform'] = PublicationForm(self.request.POST, instance=self.object) 
      context['fileform'] = fileformset(self.request.POST, self.request.FILES, instance=self.object) 
      context['imgform'] = imageformset(self.request.POST, self.request.FILES, instance=self.object) 
     else: 
      context['pubform'] = PublicationForm(instance=self.object) 
      context['fileform'] = fileformset(instance=self.object) 
      context['imgform'] = imageformset(instance=self.object) 
     return context 

    def post(self, request, *args, **kwargs): 
     self.object = self.get_object() 
     form_class = self.get_form_class() 
     pubform = self.get_form(form_class) 
     fileform = fileformset(self.request.POST, self.request.FILES, instance=self.object) 
     imgform = imageformset(self.request.POST, self.request.FILES, instance=self.object) 

     if (pubform.is_valid() and fileform.is_valid() and imgform.is_valid()): 
      return self.form_valid(pubform, fileform, imgform) 
     else: 
      return self.form_invalid(pubform, fileform, imgform) 


    def form_valid(self, pubform, fileform, imgform): 
     self.object = pubform.save() 
     fileform.instance = self.object 
     fileform.save() 
     imgform.instance = self.object 
     imgform.save() 
     return HttpResponseRedirect(self.get_success_url()) 

    def form_invalid(self, pubform, fileform, imgform): 
     return self.render_to_response(self.get_context_data(pubform=pubform, 
            fileform=fileform, 
            imgform=imgform)) 

Answer 1

最可能的原因是不設置窗體的enctype屬性。 如果使用表單來上傳你建議立即進行刪除設置文件屬性enctype像這樣：

<form method="post" enctype="multipart/form-data">