diff --git a/app/views/layouts/base_homework.html.erb b/app/views/layouts/base_homework.html.erb
index ac10931dc..396457c35 100644
--- a/app/views/layouts/base_homework.html.erb
+++ b/app/views/layouts/base_homework.html.erb
@@ -211,7 +211,7 @@
                     <li>
                       <%= link_to l(:label_question_student), {:controller => 'bids', :action => 'show'}, :class => link_class(:respond) %>
                     </li>
-                    <% if  User.current.member_of? @bid.courses.first %>
+                    <% if  User.current.member_of_course? @bid.courses.first %>
                         <li>
                           <% if User.current.logged? && @bid.courses.first && (!Member.where('user_id = ? and course_id = ?', User.current.id, @bid.courses.first.id).first.nil? && (Member.where('user_id = ? and course_id = ?', User.current.id, @bid.courses.first.id).first.roles&Role.where('id = ? or id = ? or id =?', 5, 10, 7)).size >0) %>
                               <%= link_to l(:label_homework_commit), {:controller => 'bids', :action => 'show_course'}, :class => link_class(:course) %>
diff --git a/db/schema.rb b/db/schema.rb
index 67da188af..0032afedb 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -175,58 +175,6 @@ ActiveRecord::Schema.define(:version => 20140618155324) do
 
   add_index "changesets_issues", ["changeset_id", "issue_id"], :name => "changesets_issues_ids", :unique => true
 
-  create_table "code_review_assignments", :force => true do |t|
-    t.integer "issue_id"
-    t.integer "change_id"
-    t.integer "attachment_id"
-    t.string  "file_path"
-    t.string  "rev"
-    t.string  "rev_to"
-    t.string  "action_type"
-    t.integer "changeset_id"
-  end
-
-  create_table "code_review_project_settings", :force => true do |t|
-    t.integer  "project_id"
-    t.integer  "tracker_id"
-    t.datetime "created_at"
-    t.datetime "updated_at"
-    t.integer  "updated_by"
-    t.boolean  "hide_code_review_tab",     :default => false
-    t.integer  "auto_relation",            :default => 1
-    t.integer  "assignment_tracker_id"
-    t.text     "auto_assign"
-    t.integer  "lock_version",             :default => 0,     :null => false
-    t.boolean  "tracker_in_review_dialog", :default => false
-  end
-
-  create_table "code_review_user_settings", :force => true do |t|
-    t.integer  "user_id",           :default => 0, :null => false
-    t.integer  "mail_notification", :default => 0, :null => false
-    t.datetime "created_at"
-    t.datetime "updated_at"
-  end
-
-  create_table "code_reviews", :force => true do |t|
-    t.integer  "project_id"
-    t.integer  "change_id"
-    t.datetime "created_at"
-    t.datetime "updated_at"
-    t.integer  "line"
-    t.integer  "updated_by_id"
-    t.integer  "lock_version",        :default => 0, :null => false
-    t.integer  "status_changed_from"
-    t.integer  "status_changed_to"
-    t.integer  "issue_id"
-    t.string   "action_type"
-    t.string   "file_path"
-    t.string   "rev"
-    t.string   "rev_to"
-    t.integer  "attachment_id"
-    t.integer  "file_count",          :default => 0, :null => false
-    t.boolean  "diff_all"
-  end
-
   create_table "comments", :force => true do |t|
     t.string   "commented_type", :limit => 30, :default => "", :null => false
     t.integer  "commented_id",                 :default => 0,  :null => false
@@ -793,20 +741,20 @@ ActiveRecord::Schema.define(:version => 20140618155324) do
   end
 
   create_table "relative_memos", :force => true do |t|
-    t.integer  "osp_id"
+    t.integer  "osp_id",                                :null => false
     t.integer  "parent_id"
-    t.string   "subject",                                                   :null => false
-    t.text     "content",            :limit => 16777215,                    :null => false
+    t.string   "subject",                               :null => false
+    t.text     "content",                               :null => false
     t.integer  "author_id"
-    t.integer  "replies_count",                          :default => 0
+    t.integer  "replies_count",      :default => 0
     t.integer  "last_reply_id"
-    t.boolean  "lock",                                   :default => false
-    t.boolean  "sticky",                                 :default => false
-    t.boolean  "is_quote",                               :default => false
-    t.datetime "created_at",                                                :null => false
-    t.datetime "updated_at",                                                :null => false
-    t.integer  "viewed_count_crawl",                     :default => 0
-    t.integer  "viewed_count_local",                     :default => 0
+    t.boolean  "lock",               :default => false
+    t.boolean  "sticky",             :default => false
+    t.boolean  "is_quote",           :default => false
+    t.datetime "created_at",                            :null => false
+    t.datetime "updated_at",                            :null => false
+    t.integer  "viewed_count_crawl", :default => 0
+    t.integer  "viewed_count_local", :default => 0
     t.string   "url"
     t.string   "username"
     t.string   "userhomeurl"