我知道dalli（缓存）是一个非常强大的插件，可以提高静态页面的性能。
但是带有分页的动态页面会经常更新吗？
正确的设置方法是什么dalli？
例如，我遇到的一个问题：dalli使用分页时将不同的 params[:page] 识别为同一页面:(
dalli两者都使用时，你们将如何设计系统
- 经常更新的页面
- 不会经常更新的页面
例如。我有 4 个模型，例如User、Community、Topic和Comment(defined Polymorphic to both Community, and Topic. They can be created or shown in #show pages)
就像是
- 社区 > (has_many) > 主题 > (has_many) > 评论
- 社区 > (has_many) > 评论
- 都属于用户（创作者）
我当前的代码就是这样（这有点长。抱歉）
我在使用缓存时面临分页问题......
-------------------------------------设置------------ ----------------------------
配置/环境/development.rb
config.consider_all_requests_local = true
config.action_controller.perform_caching = true
config.cache_store = :dalli_store
路线.rb
resources :communities do
resources :topics do
resources :comments do
end
end
-------------------------------------社区------------ ----------------------------
控制器/communities_controller.rb#index&show
caches_page :show
caches_action :edit, :new
def index
....
if params[:sort] == 'new'
@communities = Community.scoped.page(params[:page]).order("created_at DESC")
elsif params[:sort] = 'popular'
@communities = Community.scoped.page(params[:page]).order("follow_count DESC")
elsif params[:sort] = 'reputation'
@communities = Community.scoped.page(params[:page]).order("reputation_count DESC")
else
@communities = Community.scoped.page(params[:page]).order("created_at DESC")
end
....
end
def show
@community = Community.find(params[:community_id])
@comments @community.comments.page(params[:page]
@topics = @community.topics.limit(10)
end
views/communities/index.html.erb 注意：但是，即使我移至下一个参数 [:page]，内容也会相同：( 似乎缓存将不同的页面识别为相同的内容...
#here, the url will could be something like this example.com/communities?utf8=✓&location=14&genre=3&search=strawberry
But this is going to create gigantic petterns of the caches:(
So I want to make it work only when params[:sort] was not empty. Because, no other parameters come with when params[:sort] is not empty.
It could be like, example.com/communities?sort=new, example.com/communities?sort=popular, example.com/communities?sort=reputation
...
<% if params[:sort] %>
<% @key = "community_index_" + params[:sort] + params[:page] %>
<% cache(:controller => "communities", :action => "index", :action_suffix => @key) do %>
<%= page_entries_info(@communities, :entry_name => 'community').html_safe %>
<%= paginate @communities, :window => 4 %>
<% @communities.each do |community| %>
<%= render 'communities/community', :community => community %>
<% end %>
<% end %>
<% end %>
...
意见/社区/show.html.erb
...
<% @key = params[:community_name] + "_community_show_information" %>
<% cache(:controller => "communities", :action => "show", :action_suffix => @key) do %>
<h2>Information</h2>
<div class="CommunityInformation">
<%= render 'communities/information'%>
</div>
<% end %>
<% @key = params[:community_name] + "_community_show_wall_" + params[:page] + %>
<% cache(:controller => "communities", :action => "show", :action_suffix => @key) do %>
<%= paginate @comments, :window => 4 %>
<h2>Topic</h2>
<div class="WallInformation">
<% @comments.eager.recent.each do |comment| %>
<%= render 'communities/comment', :comment => comment %>
<% end %>
</div>
<% end %>
<% @key = params[:community_name] + "_community_show_topics" %>
<% cache(:controller => "communities", :action => "show", :action_suffix => @key) do %>
<h2>Topic</h2>
<div class="TopicInformation">
<% @topics.eager.recent.each do |topic| %>
<%= render 'communities/topic', :topic => topic %>
<% end %>
</div>
<% end %>
...
模型/community_sweeper.rb
class CommunitySweeper < ActionController::Caching::Sweeper
observe Community
def after_save(record)
expire_fragment(url_for(:action => 'index', :only_path => true) + '?????(all the caches related to the community#index)')
expire_fragment(url_for(:action => 'show', :only_path => true) + '?????(the cache related to the particular community#show)')
end
end
end
-------------------------------------主题------------ ----------------------------
控制器/topics_controller.rb#index&show
caches_page :show
caches_action :edit, :new
def index
....
@community = Community.find(params[:community_id])
@topics = @community.topics.page(params[:page]
....
end
def show
@topic = Topic.find(params[:id])
@comments = @topic.comments.page(params[:page]
end
意见/主题/index.html.erb
...
<% @key = params[:community_id] + "_topic_index_" + params[:page] %>
<% cache(:controller => "topics", :action => "index", :action_suffix => @key) do %>
<%= page_entries_info(@communities, :entry_name => 'community').html_safe %>
<%= paginate @communities, :window => 4 %>
<% @communities.each do |community| %>
<%= render 'communities/community', :community => community %>
<% end %>
<% end %>
<% end %>
...
意见/主题/show.html.erb
...
<% @key = params[:community_name] + "_topic_show_" + params[:id] + "_comments" + params[:page] %>
<% cache(:controller => "topics", :action => "show", :action_suffix => @key) do %>
<%= paginate @comments, :window => 4 %>
<%= page_entries_info(@comments, :entry_name => 'comment').html_safe %>
<h2>Comment</h2>
<div class="CommentInformation">
<% @comments.each do |comment| %>
<%= render 'topics/comment', :comment => comment %>
<% end %>
</div>
<% end %>
...
模型/topic_sweeper.rb
class TopicSweeper < ActionController::Caching::Sweeper
observe Topic
def after_save(record)
expire_fragment(url_for(:action => 'index', :only_path => true) + '?????(all the caches related to the topic#index)')
expire_fragment(url_for(:action => 'show', :only_path => true) + '?????(the cache related to the particular topic#show)')
end
end
-------------------------------------评论------------ ----------------------------
模型/comment_sweeper.rb
class CommentSweeper < ActionController::Caching::Sweeper
observe Comment
def after_save(record)
expire_fragment(url_for(:action => 'index', :only_path => true) + '?????(all the caches related to the topic#index)')
expire_fragment(url_for(:action => 'show', :only_path => true) + '?????(the cache related to the particular topic#show)')
end
end