Hi!
I have this old code here.
# forms.py
class UploadFileForm(ModelForm):
title = forms.CharField(max_length=250 ,label="Nome:")
original_image = forms.ImageField(label="Imagem:")
class Meta:
model = Photo
# models.py
from django.dispatch import receiver
from django.db.models.signals import pre_delete
class Photo(models.Model):
title = models.CharField(max_length=255)
pub_date = models.DateField(auto_now = True)
original_image = models.ImageField(upload_to='photos')
slug_photo = AutoSlugField(populate_from=('title'), unique=True,
max_length=255, overwrite=True)
model = models.ForeignKey(Model, blank=True, null=True)
@receiver(pre_delete, sender=Photo)
def delete_image(sender, instance, **kwargs):
os.remove(unicode(instance.original_image.path)) # remove the image
from folder "photos"
# views.py
def upload_photo(request):
if request.method == 'POST':
model = get_object_or_404(Model,
pk=request.POST.get("model"))
form = UploadForm(request.POST, request.FILES)
photo_exist = Photo.objects.filter(model__id = model.id)
if not photo_exist:
if form.is_valid():
form.save()
messages.add_message(request, messages.SUCCESS, 'Image save
succesfull!')
return HttpResponseRedirect(reverse('detail_model',
args=[model.slug]))
else:
return
render_to_response('project/app/detail.html',locals(),context_instance=RequestContext(request))
else:
if form.is_valid():
photo_exist.delete()
form.save()
messages.add_message(request, messages.SUCCESS, 'Image
update succesfull!')
return HttpResponseRedirect(reverse('detail_model',
args=[model.slug]))
else:
photo = Photo.objects.get(model__id = model.id) # send the
photo to detail page
return
render_to_response('project/app/detail.html',locals(),context_instance=RequestContext(request))
2012/7/13 m.paul
> Hi All,
>
> I have a Model with an image field and I want to be able to change the
> image using a ModelForm. When changing the image, the old image should be
> deleted and replaced by the new image.
>
> I have tried to do this in the clean method of the ModelForm like this:
>
> def clean(self):
> cleaned_data = super(ModelForm, self).clean()
>
> old_profile_image = self.instance.image
> if old_profile_image:
> old_profile_image.delete(save=False)
> return cleaned_data
>
> This works fine unless the file indicated by the user is not correct (for
> example if its not an image), which result in the image being deleted
> without any new images being saved. I would like to know where is the best
> place to delete the old image? By this I mean where can I be sure that the
> new image is correct before deleting the old one? I prefer to do this in my
> ModelForm class if possible but doing it in the Model class would also be
> acceptable.
>
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