old_contents: from django.db import models
  
  # Create your models here.
  class Image(models.Model):
      code = models.CharField(max_length=50)
      low_res_url = models.URLField()
      embed_code = models.TextField()
  
      @classmethod
      def create(cls, code, low_res_url, embed_code):
          img = cls(code=code, low_res_url=low_res_url, embed_code=embed_code)
          return img
  
  #class ImageManager(models.Manager):
   #   def create_Image(self, code, low_res_url, embed_code):
    #      img = self.create(code=code, low_res_url=low_res_url,
          #        embed_code=embed_code)
         # return img
  
new_contents: from django.db import models
  
  # Create your models here.
  class Image(models.Model):
      code = models.CharField(max_length=50)
      low_res_url = models.URLField()
      embed_code = models.TextField()
  
      @classmethod
      def create(cls, code, low_res_url, embed_code):
          img = cls(code=code, low_res_url=low_res_url, embed_code=embed_code)
          return img
  
subject: Update models.py