Django

Question

我正在尝试解决一个问题。在上传图像文件时，我想重命名文件并调整其大小。我想出了下面的方法。我设法调整图像大小并以有效名称保存。

不幸的是，文件被保存了两次，同样是在无效的名称下。无效的存储在我的对象中。我怎样才能解决这个问题？提前致谢

class SparePartImages(models.Model):
  sparepart = models.ForeignKey('SparePart', on_delete=models.CASCADE)
  image = models.ImageField(upload_to='spare-part/', blank=True, null=True)

  def save(self, *args, **kwargs):
    super(SparePartImages, self).save(*args, **kwargs)
    max_size = settings.IMAGE_MAX_SIZE
    file = Image.open(self.image)
    (width, height) = file.size
    if (width/max_size < height/max_size):
      factor = height/max_size
    else:
      factor = width/max_size
    size = (int(width/factor), int(height/factor))
    file = file.resize(size, Image.ANTIALIAS)

    file.save(removeAccent(self.image.path))

Answer 1

您正在调用 save 两次，一次使用 super，另一次使用 save 来修复它，请执行此操作：

from io import BytesIO
from django.core.files.uploadedfile import InMemoryUploadedFile
import sys

class SparePartImages(models.Model):
 # rest of the code
 def save(self, *args, **kwargs):
   # rest of the code 
   # but remove file.save(removeAccent(self.image.path))
   output = BytesIO()
   file.save(output, format='JPEG', quality=100)
   output.seek(0)
   self.image = InMemoryUploadedFile(
      output ,'ImageField', "%s.jpg" %self.image.name.split('.')[0], 'image/jpeg', sys.getsizeof(output), None
   )
   super(SparePartImages, self).save(*args, **kwargs)

Django - 上传的图像被保存两次：在原始名称和经过验证的名称下

Django - Uploaded image gets saved twice: under original and validated name

django-models