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

@@ -7,20 +7,16 @@ 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
+      course_prefs = Course.find_by_extra(course.identifier)
+      if params[:course_password] == course_prefs.password
         members = []
         members << Member.new(:role_ids => [10], :user_id => User.current.id)
         course.members << members
-    
+        
         StudentsForCourse.create(:student_id => User.current.id, :course_id => params[:object_id])
         @state = 0
-        else
-          @state = 1
-        end
       else
-        @state = 2
+        @state = 1
       end
     end
     respond_to do |format|
@@ -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