refactory projectController#new

app/controllers/projects_controller.rb

@@ -486,17 +486,23 @@ class ProjectsController < ApplicationController
 
   def new
     @project_type        = params[:project_type]
-    @course_tag = params[:course]
     @issue_custom_fields = IssueCustomField.sorted.all
     @trackers            = Tracker.sorted.all
+
+    case @project_type
+    when '0' # Project
       @project                 = Project.new
       @project.safe_attributes = params[:project]
-
-    ##TODO: , viewed by nyan 
-    ##add by huang 
+    when '1' # Course
+      @project                 = Project.new
+      @project.safe_attributes = params[:project]
+      @course_tag              = params[:course]
       @course                  = Course.new
       @course.safe_attributes  = params[:course]
-    ##end
+    else
+      render_404
+      return -1
+    end
     render :layout => 'base'
   end