修复获取当前用户建立项目不正确的问题

app/helpers/homework_attach_helper.rb

@@ -56,14 +56,18 @@ module HomeworkAttachHelper
   end
 
   def user_projects_option
-    projects = Project.where("id < 8")
+    cond = Project.visible_condition(User.current) + " AND projects.project_type <> 1"
+    memberships = User.current.memberships.all(:conditions => cond)
+    projects = memberships.map(&:project)
     type = []
     projects.each do |project|
+      if project != nil
         option = []
         option <<  project.name
         option <<  project.id
         type << option
       end
+    end
     type
   end
 end