增加获取学校列表按学校开设课程数排序的方法

增加当当前学校开设课程数目为0时按照上方法推荐其进入其他学校查看课程

app/controllers/school_controller.rb

@@ -28,6 +28,11 @@ class SchoolController < ApplicationController
 
   end
 
+  #获取制定学校开设的课程数
+  def course_count school_id
+     School.find(school_id).courses.count
+  end
+  
   
   def index
     

app/helpers/welcome_helper.rb

@@ -106,6 +106,30 @@ module WelcomeHelper
     # (c1.take(max)+c2).take(sum)
   end
 
+  #查找所有学校按每个学校开设课程数量降序排序
+  #page 分页查询开始条数的编号,从0开始
+  #limit 分页查询的数量
+  def find_maxmin_course_school page,limit
+    School.find_by_sql("SELECT *,(SELECT COUNT(*) FROM courses WHERE school_id = schools.id) AS a
+      FROM schools
+      ORDER BY a DESC LIMIT #{page},#{limit}")
+    #School.where(" id IN (SELECT school_id FROM courses GROUP BY school_id)").limit limit;
+    #School.order("#{School.course_count}").limit(limit).all
+    #@school = School.all.sort
+    #@school.each do |s|
+    #  s.courses.count
+    #end
+    #result = []
+    #@school = School.all.to_ary
+    #i = 1
+    #for i in  i < School.count
+    #  j = i - 1
+    #  for j in j > 0
+    #    if @school[j].courses.count >
+    #  end
+    #end
+  end
+  
   def find_miracle_project(sum, max_rate)
     max = sum*(max_rate.to_f/10)
     c1 = find_new_project(sum).to_a.dup

app/views/welcome/course.html.erb

@@ -1,6 +1,6 @@
 <%= stylesheet_link_tag 'welcome' %>
 <%= javascript_include_tag 'welcome' %>
-<script type="text/javascript" language="javascript">
+<script type="text/javascript" language="javascript" xmlns="http://www.w3.org/1999/html">
 	
     $(function(){
     	$("#main").find("a").attr("target", "_blank");
@@ -62,6 +62,36 @@
 	<span><%= link_to "更多>>", {:controller => 'projects', :action => 'course', :project_type => 1, :school_id => params[:school_id]} %></span>
     <div class="d-p-projectlist-box">
       <ul class="d-p-projectlist">
+
+      </ul>
+
+		<ul class="d-p-projectlist">
+          <% if(find_miracle_course(10, 7,params[:school_id]).map.count == 0) %>
+              <h1></h1>
+              <p id="errorExplanation">
+                未开设任何课程，您可以查看其他学校课程
+                <br/>
+              </p>
+              <h1></h1>
+              <% find_maxmin_course_school(0,9).each do |school| %>
+                  <li class='<%= cycle("odd", "even") %>'  title=<%=school.name.to_s %>>
+                    <div class='avatar'>
+                      <img src="<%=school.logo_link %>" width="65" height="65">
+                    </div>
+                    <div class='text_nowrap' style="padding-left: 15px; padding-top: 8px">
+                      [<%=school.province %>]
+                      <%= link_to( "#{school.name}", :school_id =>"#{school.id}")%>
+                    </div>
+                    <div class='text_nowrap' style="padding-left: 15px; padding-top: 8px">
+                        <span class=''>
+                          <a href="/project/course?project_type=1">课程</a> 数: <%=school.courses.count  %>
+                        </span>
+                    </div>
+                    <div class='join_course_link'>
+                    </div>
+                  </li>
+              <% end %>
+          <% else %>
               <% find_miracle_course(10, 7,params[:school_id]).map do |project| %>
                   <li class='<%= cycle("odd", "even") %>'  title=<%=project.description.to_s%>>
                     <div class='avatar'>
@@ -85,7 +115,7 @@
                       <%#=course.try(:teacher).try(:name)%>
 					</span>
                     </div>
-<!-- 				<div class='desc_item' style="">
+                    <!-- 				<div class='desc_item' style="">
 					<span class='font_lighter' title=<%#=project.description.to_s%>><%#=project.description.truncate(25, omission: '...')%></span>
 				</div> -->
                     <div class='join_course_link'>
@@ -97,12 +127,13 @@
                     </div>
                   </li>
               <% end; reset_cycle  %>
+          <% end %>
 		</ul>
 	</div>
 </div>
 
 <div id="J_Slide" class="d-p-index-box d-p-index-hotproject" style="float: right;">
-<h3 style="padding-bottom:px ;margin-left: 5px; color: #e8770d;">
+<h3 style="padding-bottom:0px ;margin-left: 5px; color: #e8770d;">
 	<strong>问题和反馈动态</strong>
 	<%= link_to "我要提问" , newbie_send_path, {:class => 'orangeButton idea_btn', :style => "color: #EEEEEE" }%>
 	<%= link_to "我要反馈" , suggestion_send_path, {:class => 'orangeButton idea_btn', :style => "color: #EEEEEE" }%>
@@ -117,11 +148,11 @@
 				    <%= link_to topic.subject.truncate(30, omission: '...'), topic.event_url, :class => "gray" , :style => "font-size: 10pt !important;" %>
 				  </span>
 				<br>
-				<span style="margin-left: 24px; color: rgb(172, 174, 177); white-space: nowrap; font-size：　9pt !important;;"><%= l(:field_updated_on) %><%=time_tag_welcome(topic_last_time topic)%>前</span>
+				<span style="margin-left: 24px; color: rgb(172, 174, 177); white-space: nowrap; font-size:9pt !important;;"><%= l(:field_updated_on) %><%=time_tag_welcome(topic_last_time topic)%>前</span>
 				<span style="margin-left: 8px; margin-bottom: 0px; color: rgb(172, 174, 177) !important; white-space: nowrap;">
 					由&nbsp;<%= link_to topic.author ? topic.author : 'Anonymous', user_path(topic.author_id), :style => "font-size: 9pt !important; color: rgb(17, 102, 173);" %>&nbsp;发表
 				</span>
-				<span style="float: right; color: rgb(172, 174, 177); white-space: nowrap; font-size：　9pt !important;;">回复(<%= link_to (topic.parent ? topic.parent.replies_count : topic.replies_count), topic.event_url %>)</span>
+				<span style="float: right; color: rgb(172, 174, 177); white-space: nowrap; font-size:9pt !important;;">回复(<%= link_to (topic.parent ? topic.parent.replies_count : topic.replies_count), topic.event_url %>)</span>
 				</div>
 			</li>
 			<% end %>