匿评作品详情返回结果中添加comment_status字段 0:所属作业尚未开启匿评，1：匿评中 2：匿评结束

app/api/mobile/entities/homework_attach.rb

@@ -17,6 +17,8 @@ module Mobile
                case field
                  when :homework_times
                    f.bid.courses.first.homeworks.index(f.bid) + 1 unless (f.bid.nil? || f.bid.courses.nil? || f.bid.courses.first.nil?)
+                 when :comment_status
+                   f.bid.comment_status
                end
             end
           end
@@ -28,6 +30,8 @@ module Mobile
       homework_attach_expose :homework_times
       homework_attach_expose :description
       homework_attach_expose :created_at
+      #comment_status 0:所属作业尚未开启匿评，1：匿评中 2：匿评结束
+      homework_attach_expose :comment_status
       expose :attachments,using: Mobile::Entities::Attachment do |f, opt|
         if f.respond_to?(:attachments)
           f.send(:attachments)