过滤器过滤加入课程的行为，不再进行n多判断

app/controllers/courses_controller.rb

@@ -7,7 +7,6 @@ class CoursesController < ApplicationController
   def join
     if User.current.logged?
       course = Project.find(params[:object_id])
-      if ( !course_endTime_timeout?(course) )
       course_prefs = Course.find_by_extra(course.identifier)
       if params[:course_password] == course_prefs.password
         members = []
@@ -19,9 +18,6 @@ class CoursesController < ApplicationController
       else
         @state = 1
       end
-      else
-        @state = 2
-      end
     end
     respond_to do |format|
       # format.html { redirect_to_referer_or {render :text => (watching ? 'Watcher added.' : 'Watcher removed.'), :layout => true}}
@@ -49,7 +45,18 @@ class CoursesController < ApplicationController
   private
 
   def allow_join
-    course_endTime_timeout? Project.find(params[:object_id])
+    if course_endTime_timeout? Project.find(params[:object_id])
+      respond_to do |format|
+        format.js{
+          @state = 2
+          render :partial => 'set_join', 
+                 :locals => {:user => User.current, 
+                            :course => Project.find(params[:object_id]), 
+                            :object_id => params[:object_id]
+                            } 
+        }
+      end
+    end
   end
 
 end