系统消息查询/显示优化（减150ms）

app/controllers/users_controller.rb

@@ -1990,11 +1990,12 @@ end
   end
 
   def show
-    if is_current_user
+    if User.current == @user
+      # 系统消息总显示在最前面,显示周期30天
+      @system_messages = SystemMessage.where("created_at > ?", Time.now - 86400 * 30)
       # 自己的主页显示消息
-      # 系统消息为管理员发送，我的消息中包含有系统消息
       @message_alls = []
-      @system_messages
+
       messages = MessageAll.where("(user_id =? and message_type !=?) or message_type =?" , @user.id, "SystemMessage", "SystemMessage").includes(:message).order("created_at desc")
 
       messages.each do |message_all|

app/views/users/_new_user_message.html.erb

@@ -1,9 +1,7 @@
-<% message_alls.each do |ma| %>
-    <%# 系统消息 %>
-    <% if ma.class == SystemMessage && many_days_ago(ma.created_at, 30) %>
-        <%= render :partial => 'users/user_message_system', :locals => {:ma => ma}  %>
-    <% end %>
+<%# 系统消息总显示在最上面 %>
+<%= render :partial => 'users/user_message_system'  %>
 
+<% message_alls.each do |ma| %>
     <% if ma.class == AtMessage && ma.at_valid? && ma.at_message %>
         <%= render :partial => 'users/user_at_message', :locals => {:ma => ma}  %>
     <% end %>
@@ -36,7 +34,7 @@
     <% if ma.class == OrgMessage %>
         <%= render :partial => 'users/user_message_org', :locals => {:ma => ma} %>
     <% end %>
-    
+
     <%# 申请类消息 %>
     <% if ma.class == AppliedMessage %>
         <%= render :partial => 'users/user_message_applied', :locals => {:ma => ma} %>

app/views/users/_user_message_system.html.erb

@@ -1,16 +1,19 @@
-<ul class="homepageNewsList fl">
-  <div class="longMessageWidth">
-    <li class="homepageNewsPortrait fl">
-      <div class="navHomepageLogo fl"><%= image_tag("/images/trustie_logo1.png", width: "30px", height: "30px", class: "mt3") %></div>
-    </li>
-    <li class="homepageNewsPubType fl">
-      <span style="color: red;float: left">系统消息：</span>
-    </li>
-    <li class="messageInformationContents">
-      <%= link_to ma.subject.blank? ? (ma.content.nil? ? ma.description.html_safe : ma.content.html_safe) : ma.subject, user_system_messages_path(User.current, :anchor => "position_#{ma.id}"),
-                  :id => "content_link_#{ma.id}", :target => '_blank' %>
-    </li>
-  </div>
-  <li class="homepageNewsTime fr"><%= time_tag(ma.created_at).html_safe %> </li>
-</ul>
+<% @system_messages.each do |ma| %>
+    <ul class="homepageNewsList fl">
+      <div class="longMessageWidth">
+        <li class="homepageNewsPortrait fl">
+          <div class="navHomepageLogo fl"><%= image_tag("/images/trustie_logo1.png", width: "30px", height: "30px", class: "mt3") %></div>
+        </li>
+        <li class="homepageNewsPubType fl">
+          <span style="color: red;float: left">系统消息：</span>
+        </li>
+        <li class="messageInformationContents">
+          <%= link_to ma.subject.blank? ? (ma.content.nil? ? ma.description.html_safe : ma.content.html_safe) : ma.subject, user_system_messages_path(User.current, :anchor => "position_#{ma.id}"),
+                      :id => "content_link_#{ma.id}", :target => '_blank' %>
+        </li>
+      </div>
+      <li class="homepageNewsTime fr"><%= time_tag(ma.created_at).html_safe %> </li>
+    </ul>
+<% end %>
+