old_contents: # -*- coding: utf-8 -*-
  #
  # This file is part of FNP-Redakcja, licensed under GNU Affero GPLv3 or later.
  # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
  #
  import re
  from urlparse import urljoin
  from django.conf import settings
  from django.core.files.base import ContentFile
  from django.db import models
  from django.db.models.signals import post_save
  from django.dispatch import receiver
  from django.utils.translation import ugettext_lazy as _
  from django.contrib.sites.models import Site
  from cover.utils import URLOpener
  
  
  class Image(models.Model):
      title = models.CharField(max_length=255, verbose_name=_('title'))
      author = models.CharField(max_length=255, verbose_name=_('author'))
      license_name = models.CharField(max_length=255, verbose_name=_('license name'))
      license_url = models.URLField(max_length=255, blank=True, verbose_name=_('license URL'))
      source_url = models.URLField(verbose_name=_('source URL'), null = True)
      download_url = models.URLField(unique=True, verbose_name=_('image download URL'), null = True)
      file = models.ImageField(upload_to='cover/image', editable=True, verbose_name=_('file'))
  
      class Meta:
          verbose_name = _('cover image')
          verbose_name_plural = _('cover images')
  
      def __unicode__(self):
          return u"%s - %s" % (self.author, self.title)
  
      @models.permalink
      def get_absolute_url(self):
          return ('cover_image', [self.id])
  
      def get_full_url(self):
          return "http://%s%s" % (Site.objects.get_current().domain, self.get_absolute_url())
  
  
  @receiver(post_save, sender=Image)
  def download_image(sender, instance, **kwargs):
      if instance.pk and not instance.file:
          t = URLOpener().open(instance.download_url).read()
          instance.file.save("%d.jpg" % instance.pk, ContentFile(t))
          
          
new_contents: # -*- coding: utf-8 -*-
  #
  # This file is part of FNP-Redakcja, licensed under GNU Affero GPLv3 or later.
  # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
  #
  import re
  from urlparse import urljoin
  from django.conf import settings
  from django.core.files.base import ContentFile
  from django.db import models
  from django.db.models.signals import post_save
  from django.dispatch import receiver
  from django.utils.translation import ugettext_lazy as _
  from django.contrib.sites.models import Site
  from cover.utils import URLOpener
  
  
  class Image(models.Model):
      title = models.CharField(max_length=255, verbose_name=_('title'))
      author = models.CharField(max_length=255, verbose_name=_('author'))
      license_name = models.CharField(max_length=255, verbose_name=_('license name'))
      license_url = models.URLField(max_length=255, blank=True, verbose_name=_('license URL'))
      source_url = models.URLField(verbose_name=_('source URL'), null=True, blank=True)
      download_url = models.URLField(unique=True, verbose_name=_('image download URL'), null=True, blank=True)
      file = models.ImageField(upload_to='cover/image', editable=True, verbose_name=_('file'))
  
      class Meta:
          verbose_name = _('cover image')
          verbose_name_plural = _('cover images')
  
      def __unicode__(self):
          return u"%s - %s" % (self.author, self.title)
  
      @models.permalink
      def get_absolute_url(self):
          return ('cover_image', [self.id])
  
      def get_full_url(self):
          return "http://%s%s" % (Site.objects.get_current().domain, self.get_absolute_url())
  
  
  @receiver(post_save, sender=Image)
  def download_image(sender, instance, **kwargs):
      if instance.pk and not instance.file:
          t = URLOpener().open(instance.download_url).read()
          instance.file.save("%d.jpg" % instance.pk, ContentFile(t))
          
          
  
subject: Allow blank source in cover.