Removed strange 'exists' method in post manager, fixed tests in which it was

used

boards/models/post.py

@@ -3,7 +3,6 b' from random import random'
 import time
 import math
 import re
-from django.core.cache import cache
 
 from django.db import models
 from django.http import Http404
@@ -79,15 +78,12 b' class PostManager(models.Manager):'
         if post.replies.count() > 0:
             map(self.delete_post, post.replies.all())
 
-        # Update thread's last edit time (used as cache key)
+        # Update thread's last edit time
         thread = post.thread
         if thread:
-            thread.clear_cache()
-
             thread.last_edit_time = timezone.now()
             thread.save()
 
-        post.clear_cache()
         post.delete()
 
     def delete_posts_by_ip(self, ip):
@@ -123,17 +119,10 b' class PostManager(models.Manager):'
         except Post.DoesNotExist:
             raise Http404
 
-        cache_key = opening_post.get_cache_key()
-        thread = cache.get(cache_key)
-        if thread:
-            return thread
-
         if opening_post.replies:
             thread = [opening_post]
             thread.extend(opening_post.replies.all().order_by('pub_time'))
 
-            cache.set(cache_key, thread, boards_settings.CACHE_TIMEOUT)
-
             return thread
 
     def get_thread_page_count(self, tag=None):
@@ -253,20 +242,12 b' class Post(models.Model):'
 
         return post_count <= settings.MAX_POSTS_PER_THREAD
 
-    def clear_cache(self):
-        """Remove the post from cache"""
-
-        cache_key = self.get_cache_key()
-        cache.delete(cache_key)
-
     def bump(self):
         """Bump (move to up) thread"""
 
         if self.can_bump():
             self.bump_time = timezone.now()
 
-        self.clear_cache()
-
     def get_last_replies(self):
         if settings.LAST_REPLIES_COUNT > 0:
             reply_count = self.get_reply_count()
@@ -284,9 +265,6 b' class Post(models.Model):'
 
         return self.tags.order_by('name')
 
-    def get_cache_key(self):
-        return 'thread_cache' + str(self.id)
-
     def get_sorted_referenced_posts(self):
         return self.referenced_posts.order_by('id')
 

boards/tests.py

@@ -41,7 +41,7 b' class PostTests(TestCase):'
 
         Post.objects.delete_post(post)
 
-        self.assertFalse(Post.objects.exists(post_id))
+        self.assertFalse(Post.objects.filter(id=post_id).exists())
 
     def test_delete_thread(self):
         """Test thread deletion"""
@@ -51,7 +51,7 b' class PostTests(TestCase):'
 
         Post.objects.delete_post(thread)
 
-        self.assertFalse(Post.objects.exists(reply.id))
+        self.assertFalse(Post.objects.filter(id=reply.id).exists())
 
     def test_post_to_thread(self):
         """Test adding post to a thread"""
@@ -72,7 +72,7 b' class PostTests(TestCase):'
 
         Post.objects.delete_posts_by_ip('0.0.0.0')
 
-        self.assertFalse(Post.objects.exists(post_id))
+        self.assertFalse(Post.objects.filter(id=post_id).exists())
 
     def test_get_thread(self):
         """Test getting all posts of a thread"""