diff --git a/selfblog/blog/models.py b/selfblog/blog/models.py
index b2e4e1d..4c62be8 100644
--- a/selfblog/blog/models.py
+++ b/selfblog/blog/models.py
@@ -1,8 +1,9 @@
-#coding:utf-8
+# coding:utf-8
 from datetime import datetime
 
 from django.db import models
 from django.contrib.auth.models import User
+from django.utils.functional import cached_property
 
 from selfblog import settings
 from utils.cache import cache_decorator
@@ -77,6 +78,16 @@ def tags_list(self):
     def get_absolute_url(self):
         return '%s/%s.html' % (settings.DOMAIN, self.alias)
 
+    @cached_property
+    def next_post(self):
+        # 下一篇
+        return Post.objects.filter(id__gt=self.id, status=0).order_by('id').first()
+
+    @cached_property
+    def prev_post(self):
+        # 前一篇
+        return Post.objects.filter(id__lt=self.id, status=0).first()
+
     @classmethod
     @cache_decorator(1*60)
     def get_recently_posts(cls, num):
diff --git a/selfblog/blog/templates/detail.html b/selfblog/blog/templates/detail.html
index b9288d6..bad2b12 100644
--- a/selfblog/blog/templates/detail.html
+++ b/selfblog/blog/templates/detail.html
@@ -77,15 +77,15 @@ <h2 class="under_line">
 
     <div class="box">
         【上一篇】
-        {% if prev_post %}
-            <a href="{{ prev_post.get_absolute_url }}">{{ prev_post.title }}</a>
+        {% if post.prev_post %}
+            <a href="{{ post.prev_post.get_absolute_url }}">{{ post.prev_post.title }}</a>
         {% else %}
             没有了
         {% endif %}
         <br/>
         【下一篇】
-        {% if next_post %}
-            <a href="{{ next_post.get_absolute_url }}">{{ next_post.title }}</a>
+        {% if post.next_post %}
+            <a href="{{ post.next_post.get_absolute_url }}">{{ post.next_post.title }}</a>
         {% else %}
             没有了
         {% endif %}
diff --git a/selfblog/blog/views.py b/selfblog/blog/views.py
index 60538ad..a709606 100644
--- a/selfblog/blog/views.py
+++ b/selfblog/blog/views.py
@@ -1,7 +1,8 @@
-#coding:utf-8
+# coding:utf-8
 import logging
 
 from django.db.models import Q
+from django.db.models import F
 from django.core.paginator import Paginator
 from django.views.generic import ListView, DetailView
 from django.shortcuts import render
@@ -129,8 +130,7 @@ def get(self, request, *args, **kwargs):
         visited_ips = cache.get(self.object.id, [])
 
         if ip not in visited_ips:
-            self.object.view_times += 1
-            self.object.save()
+            Post.objects.filter(id=self.object.id).update(view_times=F('view_times')+1)
 
             visited_ips.append(ip)
 
@@ -143,7 +143,7 @@ def get(self, request, *args, **kwargs):
         return self.render_to_response(context)
 
     def set_lru_read(self, ip, post):
-        #保存别人正在读
+        # 保存别人正在读
         lru_views = cache.get('lru_views')
         if not lru_views:
             lru_views = LRUCacheDict(max_size=10, expiration=FIF_MIN)
@@ -155,27 +155,11 @@ def set_lru_read(self, ip, post):
 
     def get_context_data(self, **kwargs):
         context = super(PostDetailView, self).get_context_data(**kwargs)
-        post = self.get_object()
-        next_id = post.id + 1
-        prev_id = post.id - 1
-
-        try:
-            next_post = self.queryset.get(id=next_id)
-        except Post.DoesNotExist:
-            next_post = None
-
-        try:
-            prev_post = self.queryset.get(id=prev_id)
-        except Post.DoesNotExist:
-            prev_post = None
-
-        context['next_post'] = next_post
-        context['prev_post'] = prev_post
 
         context['lru_views'] = cache.get('lru_views', {}).items()
         context['cur_user_ip'] = self.cur_user_ip
 
-        context['related_posts'] = post.related_posts
+        context['related_posts'] = self.object.related_posts
 
         return context