嘿,我有以下代码,但是它没有返回错误,但是图像没有被调整大小,开始时是6.2 MB,运行代码后是相同的:
我的模特:
class Photo(models.Model):
user_name= models.ForeignKey(User, on_delete=models.CASCADE, blank=True, null=True)
photo= models.ImageField()
photo_name= models.TextField(max_length=300)
def __str__(self):
return self.photo_name
def get_absolute_url(self):
return reverse('photo:add_photo',{'pk':self.pk})
我的Model.Form
class PhotoForm(ModelForm):
def clean_image(self):
img = self.cleaned_data.get('photo')
if not img:
return img
maxdim = 1024
if any(dim > maxdim for dim in img.image.size):
# Resize too large image up to the max_size
i = Image.open(img.file)
fmt = i.format.lower()
i.thumbnail((maxdim, maxdim))
# We must reset io.BytesIO object, otherwise resized image bytes
# will get appended to the original image
img.file = type(img.file)()
i.save(img.file, fmt)
return img
class Meta:
model = Photo
exclude= ('user_name',)
我的views.py
class PhotoCreateView(View):
form_class = PhotoForm
template_name = 'photo/photo_form.html'
def get(self,request):
form = self.form_class(None)
return render(request,self.template_name,{'form': form})
def post(self,request):
form = self.form_class(request.POST, request.FILES)
if form.is_valid():
return redirect('travel:main')
return render(request, self.template_name,{})
任何人都知道为什么它不返回错误,但是图像仍然具有相同的大小。我想将图像上传到我在pythonanywhere.com上托管的应用程序中,并且图像存储空间限制为512 MB,这不是很多。
答案 0 :(得分:0)
您可以使用调整大小方法来代替缩略图,如下所示:
def clean_image(self):
img = self.cleaned_data.get('photo')
if not img:
return img
maxdim = 1024
if any(dim > maxdim for dim in img.image.size):
# Resize too large image up to the max_size
i = Image.open(img.file)
img = i.resize((maxdim, maxdim), Image.ANTIALIAS)
img.save(image/file/path)
return img
答案 1 :(得分:0)
如果您想要一个程序包来保存您确定的不同大小和标签的图像,则可以使用N
程序包并像这样使用它们:
models.py:
django-stdimage
some.html:
image = StdImageField(upload_to=upload_to, blank=True, variations={
'large': (600, 400),
'thumbnail': (100, 100, True),
'medium': (300, 200),
})