Fixes #4076: Recommendations from collections.

[wolnelektury.git] / src / lesmianator / models.py

diff --git a/src/lesmianator/models.py b/src/lesmianator/models.py
index 684d1c4..9e2f166 100644 (file)
--- a/src/lesmianator/models.py
+++ b/src/lesmianator/models.py
@@ -1,39 +1,37 @@
-# -*- coding: utf-8 -*-
 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
-import cPickle
-from cPickle import PickleError
+from functools import reduce
+import pickle
+from pickle import PickleError
 from datetime import datetime
 from random import randint
-from StringIO import StringIO
 
 from django.core.files.base import ContentFile
 from django.db import models
 from django.utils.timezone import utc
 from django.utils.translation import ugettext_lazy as _
-from django.core.urlresolvers import reverse
 from django.contrib.auth.models import User
 from django.contrib.contenttypes.models import ContentType
 from django.contrib.contenttypes.fields import GenericForeignKey
 from django.conf import settings
+from django.urls import reverse
 
-from jsonfield import JSONField
 from catalogue.models import Book, Tag
 
 
 class Poem(models.Model):
     slug = models.SlugField(_('slug'), max_length=120, db_index=True)
     text = models.TextField(_('text'))
-    created_by = models.ForeignKey(User, null=True)
-    created_from = JSONField(_('extra information'), null=True, blank=True)
+    created_by = models.ForeignKey(User, models.SET_NULL, null=True)
+    created_from = models.TextField(_('extra information'), null=True, blank=True)
     created_at = models.DateTimeField(_('creation date'), auto_now_add=True, editable=False)
     seen_at = models.DateTimeField(_('last view date'), auto_now_add=True, editable=False)
     view_count = models.IntegerField(_('view count'), default=1)
 
     try:
-        f = open(settings.LESMIANATOR_PICKLE)
-        global_dictionary = cPickle.load(f)
+        f = open(settings.LESMIANATOR_PICKLE, 'rb')
+        global_dictionary = pickle.load(f)
         f.close()
     except (IOError, AttributeError, PickleError):
         global_dictionary = {}
@@ -43,13 +41,13 @@ class Poem(models.Model):
         self.seen_at = datetime.utcnow().replace(tzinfo=utc)
         self.save()
 
-    def __unicode__(self):
+    def __str__(self):
         return "%s (%s...)" % (self.slug, self.text[:20])
 
     @staticmethod
     def choose_letter(word, continuations):
         if word not in continuations:
-            return u'\n'
+            return '\n'
 
         choices = sum((continuations[word][letter]
                        for letter in continuations[word]))
@@ -68,7 +66,7 @@ class Poem(models.Model):
             return ''
 
         letters = []
-        word = u''
+        word = ''
 
         finished_stanza_verses = 0
         current_stanza_verses = 0
@@ -84,7 +82,7 @@ class Poem(models.Model):
             word = word[-length + 1:] + letter
             char_count += 1
 
-            if letter == u'\n':
+            if letter == '\n':
                 if verse_start:
                     finished_stanza_verses += current_stanza_verses
                     current_stanza_verses = 0
@@ -102,15 +100,15 @@ class Poem(models.Model):
 
 class Continuations(models.Model):
     pickle = models.FileField(_('Continuations file'), upload_to='lesmianator')
-    content_type = models.ForeignKey(ContentType)
+    content_type = models.ForeignKey(ContentType, models.CASCADE)
     object_id = models.PositiveIntegerField()
     content_object = GenericForeignKey('content_type', 'object_id')
 
     class Meta:
         unique_together = (('content_type', 'object_id'), )
 
-    def __unicode__(self):
-        return "Continuations for: %s" % unicode(self.content_object)
+    def __str__(self):
+        return "Continuations for: %s" % str(self.content_object)
 
     @staticmethod
     def join_conts(a, b):
@@ -124,7 +122,6 @@ class Continuations(models.Model):
     @classmethod
     def for_book(cls, book, length=3):
         # count from this book only
-        output = StringIO()
         wldoc = book.wldocument(parse_dublincore=False)
         output = wldoc.as_text(('raw-text',)).get_bytes()
         del wldoc
@@ -157,8 +154,8 @@ class Continuations(models.Model):
             obj = cls.objects.get(content_type=object_type, object_id=sth.id)
             if not obj.pickle:
                 raise cls.DoesNotExist
-            f = open(obj.pickle.path)
-            keys, conts = cPickle.load(f)
+            f = open(obj.pickle.path, 'rb')
+            keys, conts = pickle.load(f)
             f.close()
             if set(keys) != should_keys:
                 raise cls.DoesNotExist
@@ -172,6 +169,6 @@ class Continuations(models.Model):
                 raise NotImplementedError('Lesmianator continuations: only Book and Tag supported')
 
             c, created = cls.objects.get_or_create(content_type=object_type, object_id=sth.id)
-            c.pickle.save(sth.slug+'.p', ContentFile(cPickle.dumps((should_keys, conts))))
+            c.pickle.save(sth.slug+'.p', ContentFile(pickle.dumps((should_keys, conts))))
             c.save()
             return conts