X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/528a34731579d8b81df43879f2b63c2754005a86..ddf2102eff7ea420a4ea5144c43409587fc1156e:/src/catalogue/models/collection.py

diff --git a/src/catalogue/models/collection.py b/src/catalogue/models/collection.py
index 75c56ea99..8510b2cb1 100644
--- a/src/catalogue/models/collection.py
+++ b/src/catalogue/models/collection.py
@@ -13,11 +13,12 @@ class Collection(models.Model):
     """A collection of books, which might be defined before publishing them."""
     title = models.CharField(_('title'), max_length=120, db_index=True)
     slug = models.SlugField(_('slug'), max_length=120, primary_key=True)
-    description = models.TextField(_('description'), null=True, blank=True)
+    description = models.TextField(_('description'), blank=True)
     book_slugs = models.TextField(_('book slugs'))
     authors = models.ManyToManyField(
         'Tag',
-        limit_choices_to={'category': 'author'}
+        limit_choices_to={'category': 'author'},
+        blank=True
     )
     kind = models.CharField(_('kind'), max_length=10, blank=False, default='book', db_index=True,
                             choices=(('book', _('book')), ('picture', _('picture'))))
@@ -55,6 +56,12 @@ class Collection(models.Model):
         from catalogue.models import Book
         return Book.objects.filter(self.get_query())
 
+    def get_5_books(self):
+        return self.get_books()[:5]
+
+    def example3(self):
+        return self.get_books()[:3]
+
     @cached_render('catalogue/collection_box.html')
     def box(self):
         return {