add chance to new preoject

app/helpers/welcome_helper.rb

@@ -64,12 +64,11 @@ module WelcomeHelper
     (c1.take(max)+c2).take(sum)
   end
   
-  def find_miracle_project(sum=10, max_rate=7)
+  def find_miracle_project(sum, max_rate)
     max = sum*(max_rate.to_f/10)
     c1 = find_new_project(sum).to_a.dup
     c2 = find_all_hot_project(sum).to_a.dup
-    c2 = c2 - c1
-    (c1.take(max)+c2).take(sum)
+    (c2.take(sum-max)+c1.take(max)).take(sum)
   end
   
   def find_new_course limit=15
@@ -77,7 +76,7 @@ module WelcomeHelper
   end
   
   def find_new_project limit=15
-    Project.visible.joins(:course_extra).where("#{Project.table_name}.project_type = ? ", 0).order("courses.time DESC, #{Project.table_name}.created_on DESC").limit(limit).all
+    Project.visible.where("#{Project.table_name}.project_type = ? ", 0).order("#{Project.table_name}.updated_on DESC, #{Project.table_name}.created_on DESC").limit(limit).all
   end
 
 

app/views/welcome/_search_project.html.erb

@@ -4,11 +4,4 @@
 		<%= hidden_field_tag 'project_type', project_type %>
 		<%= submit_tag l(:label_search), :class => "enterprise", :name => nil %>
 		</div>	
-		<div class='font_lighter' style="margin: 0; padding: 0; margin-top: 4px;">
-		<%= if project_type == 0
-			"全站项目搜索。不会搜索私有项目"
-		 else 
-			"全站课程搜索。"
-		 end %>
-		</div>		
 <% end %>	

app/views/welcome/course.html.erb

@@ -96,6 +96,7 @@
 	</div>
 	<div class="search-bar">
 		<%= render :partial => "search_project", :locals => {:project_type => 1}%>	
+		<div class='font_lighter' style="margin: 0; padding: 0; margin-top: 4px;">全站课程搜索。</div>
 	</div>
 	<div style="clear: both;"></div>
 	</div>

app/views/welcome/index.html.erb

@@ -96,6 +96,7 @@
 	</div>
 	<div class="search-bar">		
 		<%= render :partial => "search_project", :locals => {:project_type => 0}%>	
+		<div class='font_lighter' style="margin: 0; padding: 0; margin-top: 4px;">全站项目搜索。不会搜索私有项目</div>	
 	</div>
 	<div style="clear: both;"></div>
 	</div>
@@ -111,7 +112,7 @@
 	<span style="margin-top: -20px;float: right; display: block;"><%= link_to "更多>>", { :controller => 'projects', :action => 'index', :project_type => 0, :host => Setting.project_domain}, :target => "_blank"  %></span>
 	<div class="d-p-projectlist-box">
 		<ul class="d-p-projectlist">
-			<% find_miracle_project(10, 7).map do |project| %>
+			<% find_miracle_project(10, 3).map do |project| %>
 			<li style="position:relative;height:6em;" class='<%= cycle("odd", "even") %>'>
 				<div style="float: left;">
 					<%= image_tag(get_project_avatar(project), :class => "avatar-4") %>