django-crispy-forms 如何保存图片

Question

我正在尝试使用django-crispy-forms来保存一张图片。但是每次保存时，我得到的结果都是“None”。请问在使用crispy_forms保存图片时，有什么特别需要注意的地方吗？

这是我的 forms.py:

class Edit_Profile(forms.ModelForm):

    class Meta:
        model = MyUser  
        fields = ('display_name', 'real_name', 'email', 'location', 'picture',)

    helper = FormHelper()
    helper.form_method = 'POST'
    helper.form_class = 'form-horizontal'
    helper.label_class = 'col-lg-2'
    helper.field_class = 'col-lg-8'
    helper.layout = Layout(
        Fieldset(
            '', 'display_name', 'real_name', 'email', 'location', 'picture',
        ),
        Div(
            Submit('submit', 'Submit', css_class='btn-primary'),
            css_class='col-lg-offset-2',
        )
    )

    def update_info(self, user, myuser):
        """ get the user, and update info """
        cd = self.cleaned_data
        print(cd)
        myuser = MyUser.objects.get(user=user)
        try:
            myuser.display_name = cd['display_name']
            myuser.real_name = cd['real_name']
            myuser.location = cd['location']
            myuser.picture = cd['picture']
            myuser.save()
            user.email = cd['email']
            user.save()
        except:
            raise forms.ValidationError("Unable to update profile")

还有我的 views.py:

@login_required(login_url=reverse_lazy('core:login'))
def edit_profile(request, username):
    myuser=MyUser.objects.get(user=request.user)
    info = profile_info(user=request.user, myuser=myuser)
    if request.method == 'POST':
        form = Edit_Profile(request.POST)
        if form.is_valid():
            print(form.cleaned_data['picture'])
            form.update_info(user=request.user, myuser=myuser)
            messages.info(request, 'Profile updated')
            return HttpResponseRedirect(reverse('core:profile', 
                kwargs={'username': request.user.username}))
        else:
            messages.warning(request, 'Unable to update profile')
            return HttpResponseRedirect(reverse('core:profile', 
                kwargs={'username': request.user.username}))
    else:
        form = Edit_Profile(initial=profile_data(user=request.user, myuser=myuser))
    return render(request, 'core/edit_profile.html', {'form': form})

Answer 1

在Django中，上传的文件会保存在 request.FILES 这个地方，所以：

if request.method == 'POST':
    form = Edit_Profile(request.POST, request.FILES)

要注意，你的 <form> 表单需要加上 enctype="multipart/form-data"，否则 request.FILES 就会是一个空的对象。