当课程没有讨论区时自动创建其讨论区

app/controllers/boards_controller.rb

@@ -42,12 +42,19 @@ class BoardsController < ApplicationController
     elsif @course
       if (User.current.admin? || @course.is_public == 1 || (@course.is_public == 0 && User.current.member_of_course?(@course)))
         @boards = @course.boards.includes(:last_message => :author).all
-        @boards = [] << @boards[0] if @boards.any?
+        if @course.boards.empty?
+          @board = @course.boards.build
+          @board.name = " #{l(:label_borad_course) }"
+          @board.description = @course.name.to_s
+          @board.project_id = -1
+          if @board.save
+            @boards = @course.boards.includes(:last_message => :author).all
+          end
+        end
         if @boards.size == 1
-          @board = @boards.first
-          show and return
+          @board = @course.boards.first
         end
-        render :layout => 'base_courses'
+        show and return
       else
         render_403
       end
@@ -65,7 +72,7 @@ class BoardsController < ApplicationController
                     'replies' => "#{Message.table_name}.replies_count",
                     'updated_on' => "COALESCE(last_replies_messages.created_on, #{Message.table_name}.created_on)"
 
-        @topic_count = @board.topics.count
+        @topic_count = @board ? @board.topics.count : 0
         if @project
           @topic_pages = Paginator.new @topic_count, per_page_option, params['page']
           @topics =  @board.topics.
@@ -77,14 +84,13 @@ class BoardsController < ApplicationController
               preload(:author, {:last_reply => :author}).
               all
         elsif @course
-          board_topics =  @board.topics.
-              reorder("#{Message.table_name}.sticky DESC").
+          board_topics =  @board ? @board.topics.reorder("#{Message.table_name}.sticky DESC").
               includes(:last_reply).
               # limit(@topic_pages.per_page).
               # offset(@topic_pages.offset).
               order(sort_clause).
               preload(:author, {:last_reply => :author}).
-              all
+              all : []
           @topics = paginateHelper board_topics,10
         end
 

app/views/layouts/base_courses.html.erb

@@ -132,8 +132,8 @@
         </div>
         <div class="subNav">
           <%= link_to l(:label_course_board), course_boards_path(@course), :class => "f14 c_blue02" %>
-          <%= link_to "(#{@course.boards[0].topics.count})", course_boards_path(@course), :class => "subnav_num c_orange" %>
-          <%= link_to( "+#{l(:label_message_new)}", new_board_message_path(@course.boards[0]), :class => 'subnav_green ml95 c_white') if User.current.member_of_course?(@course) %>
+          <%= link_to "(#{@course.boards.first ? @course.boards.first.topics.count : 0})", course_boards_path(@course), :class => "subnav_num c_orange" %>
+          <%= link_to( "+#{l(:label_message_new)}", new_board_message_path(@course.boards.first), :class => 'subnav_green ml95 c_white') if User.current.member_of_course?(@course) && @course.boards.first %>
         </div>
         <div class="subNav">
           <%= link_to l(:label_course_feedback), course_feedback_path(@course), :class => "f14 c_blue02" %>