ImageField Size Validation

ImageField Size Validation

class Meta: 
    model = NameModel    

def clean_image(self):
    image = self.cleaned_data.get['image']
    if image:
        from django.core.files.images import get_image_dimensions
        w, h = get_image_dimensions(image)
        if not image.content_type in settings.VALID_IMAGE_FORMATS:
            raise forms.ValidationError(u'Only *.gif, *.jpg and *.png images are allowed.')
        if w > settings.VALID_IMAGE_WIDTH or h > settings.VALID_IMAGE_HEIGHT:
            raise forms.ValidationError(u'That image is too big. The image needs to be ' +     str(settings.VALID_IMAGE_WIDTH) + 'px * ' + str(settings.VALID_IMAGE_HEIGHT) + 'px (or less).')
    return image