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=== 썸네일 만들기 ===
[http://code.djangoproject.com/wiki/ThumbNails 썸네일 만드는 다양한 방법들]을 참고할 수 있는데, 그 가운데 [http://superjared.com/entry/django-quick-tips-2-image-thumbnails/ 원본저장시 하나의 썸네일을 동시저장]하는 방법이 간편한 방법이라 할만하다. 하지만, 1.0에서는 동작하지 아니함. 1.0을 위해서는 아래와 같아야 함.

{{{#!python
from django.db import models

class Photo(models.Model):
    """
    A photo for my site
    """
    title = models.CharField(maxlength=50)
    photo = models.ImageField(upload_to="photos/")
    thumbnail = models.ImageField(upload_to="thumbnails/", editable=False)
    
    def save(self):
        from PIL import Image
        from cStringIO import StringIO
        from django.core.files.uploadedfile import SimpleUploadedFile
    
        # Set our max thumbnail size in a tuple (max width, max height)
        THUMBNAIL_SIZE = (50, 50)
    
        # Open original photo which we want to thumbnail using PIL's Image
        # object
        image = Image.open(self.photo.name)
    
        # Convert to RGB if necessary
        # Thanks to Limodou on DjangoSnippets.org
        # http://www.djangosnippets.org/snippets/20/
        if image.mode not in ('L', 'RGB'):
            image = image.convert('RGB')
    
        # We use our PIL Image object to create the thumbnail, which already
        # has a thumbnail() convenience method that contrains proportions.
        # Additionally, we use Image.ANTIALIAS to make the image look better.
        # Without antialiasing the image pattern artifacts may result.
        image.thumbnail(THUMBNAIL_SIZE, Image.ANTIALIAS)
    
        # Save the thumbnail
        temp_handle = StringIO()
        image.save(temp_handle, 'png')
        temp_handle.seek(0)

        # Save to the thumbnail field
        suf = SimpleUploadedFile(os.path.split(self.photo.name)[-1],
                temp_handle.read(), content_type='image/png')
        self.thunbnail.save(suf.name+'.png', suf, save=False)
        
        # Save this photo instance
        super(Photo, self).save()

    class Admin:
        pass

    def __str__(self):
        return self.title
}}}

[Django] 1.0 릴리즈(2008-09-04) 이후 바뀐 점들

참고정보

관련포스트

참고이슈들

form_for_model 이 없어짐

form_for_model 은 ModelForm을 서브클래싱하여 쓰라고 되어있으나 몇가지 문제가 있다.

  1. 다른 폼과 mixin 하여 쓸 수 없다. : metaclass conflict 메세지와 함께 안된다고 나온다. http://www.djangosnippets.org/snippets/703 을 써서 동작하게 할 수 있다.

  2. mixin 대상이 둘 다 ModelForm 일 경우 또 동작하지 않는다. http://code.djangoproject.com/ticket/7018 로 보고가 되어있다. 임시방편은 티켓페이지 참고

모델객체 save할때 force_insert?

모델의 save를 오버라이드 했을 경우, force_insert=True 인수를 추가로 줘야한다. 이는 모델객체를 create 할때 update가 아닌 insert만 하고자 하는 의도. ([http://code.djangoproject.com/wiki/BackwardsIncompatibleChanges#createandget_or_createwillneverupdateexistingobjects 참고])

업로드파일의 경로변경

다음처럼 파일경로(path, url)가 바뀌였다.

  • model.get_filefield_filename() --> model.filefield.name

  • model.get_filefield_url() --> model.filefield.url

썸네일 만들기

[http://code.djangoproject.com/wiki/ThumbNails 썸네일 만드는 다양한 방법들]을 참고할 수 있는데, 그 가운데 [http://superjared.com/entry/django-quick-tips-2-image-thumbnails/ 원본저장시 하나의 썸네일을 동시저장]하는 방법이 간편한 방법이라 할만하다. 하지만, 1.0에서는 동작하지 아니함. 1.0을 위해서는 아래와 같아야 함. 

   1 from django.db import models
   2 
   3 class Photo(models.Model):
   4     """
   5     A photo for my site
   6     """
   7     title = models.CharField(maxlength=50)
   8     photo = models.ImageField(upload_to="photos/")
   9     thumbnail = models.ImageField(upload_to="thumbnails/", editable=False)
  10     
  11     def save(self):
  12         from PIL import Image
  13         from cStringIO import StringIO
  14         from django.core.files.uploadedfile import SimpleUploadedFile
  15     
  16         # Set our max thumbnail size in a tuple (max width, max height)
  17         THUMBNAIL_SIZE = (50, 50)
  18     
  19         # Open original photo which we want to thumbnail using PIL's Image
  20         # object
  21         image = Image.open(self.photo.name)
  22     
  23         # Convert to RGB if necessary
  24         # Thanks to Limodou on DjangoSnippets.org
  25         # http://www.djangosnippets.org/snippets/20/
  26         if image.mode not in ('L', 'RGB'):
  27             image = image.convert('RGB')
  28     
  29         # We use our PIL Image object to create the thumbnail, which already
  30         # has a thumbnail() convenience method that contrains proportions.
  31         # Additionally, we use Image.ANTIALIAS to make the image look better.
  32         # Without antialiasing the image pattern artifacts may result.
  33         image.thumbnail(THUMBNAIL_SIZE, Image.ANTIALIAS)
  34     
  35         # Save the thumbnail
  36         temp_handle = StringIO()
  37         image.save(temp_handle, 'png')
  38         temp_handle.seek(0)
  39 
  40         # Save to the thumbnail field
  41         suf = SimpleUploadedFile(os.path.split(self.photo.name)[-1],
  42                 temp_handle.read(), content_type='image/png')
  43         self.thunbnail.save(suf.name+'.png', suf, save=False)
  44         
  45         # Save this photo instance
  46         super(Photo, self).save()
  47 
  48     class Admin:
  49         pass
  50 
  51     def __str__(self):
  52         return self.title

Django1.0 (last edited 2013-06-28 09:46:23 by 61)

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