diff --git a/app/controllers/challenges_controller.rb b/app/controllers/challenges_controller.rb
index 9b5f0b869..fdaa30305 100644
--- a/app/controllers/challenges_controller.rb
+++ b/app/controllers/challenges_controller.rb
@@ -230,11 +230,16 @@ class ChallengesController < ApplicationController
   def crud_answer
     raise '参考答案不能为空' if params[:challenge_answer].empty?
     raise '占比之和必须为100%' if params[:challenge_answer].map{|a| a[:score]}.sum != 100
-    @challenge.challenge_answers.destroy_all if @challenge.challenge_answers
-    params[:challenge_answer].each_with_index do |answer, index|
-      ChallengeAnswer.create(name: answer[:name], contents: answer[:contents],
-                             level: index+1, score: answer[:score], challenge_id: @challenge.id)
+    ActiveRecord::Base.transaction do
+      @challenge.challenge_answers.destroy_all if @challenge.challenge_answers
+      params[:challenge_answer].each_with_index do |answer, index|
+        # 内容为空不保存
+        next if answer[:contents].blank?
+        ChallengeAnswer.create(name: answer[:name], contents: answer[:contents],
+                               level: index+1, score: answer[:score], challenge_id: @challenge.id)
+      end
     end
+
   end
 
   # 查看参考答案接口
diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index 6042fbc9a..973e73dac 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -315,7 +315,7 @@ class CoursesController < ApplicationController
     # @users = User.where.not(id: user_ids_of_course_members)
 
     @users = User.where(status: User::STATUS_ACTIVE)
-    @users = @users.where("concat(users.firstname, users.lastname) like '%#{name}%'") if name.present?
+    @users = @users.where("concat(users.lastname, users.firstname) like '%#{name}%'") if name.present?
     # REDO:Extension
     @users = @users.joins(user_extension: :school).where("schools.name like '%#{school_name}%'") if school_name.present?
 
diff --git a/app/controllers/homework_commons_controller.rb b/app/controllers/homework_commons_controller.rb
index 84ee9daf2..cfc1c4ba5 100644
--- a/app/controllers/homework_commons_controller.rb
+++ b/app/controllers/homework_commons_controller.rb
@@ -1597,7 +1597,7 @@ class HomeworkCommonsController < ApplicationController
       att = attachment.copy
       att.author_id = homework_bank.user_id
       att.copy_from = attachment.id
-      att.attachtype = attachment.attachtype
+      att.attachtype = attachment.attachtype || 1
       homework_bank.attachments << att
     end
     homework_bank
diff --git a/app/controllers/question_banks_controller.rb b/app/controllers/question_banks_controller.rb
index 5ff247729..098c07d1b 100644
--- a/app/controllers/question_banks_controller.rb
+++ b/app/controllers/question_banks_controller.rb
@@ -154,7 +154,7 @@ class QuestionBanksController < ApplicationController
           att.container_id = nil
           att.container_type = nil
           att.author_id = homework.user_id
-          att.attachtype = attachment.attachtype
+          att.attachtype = attachment.attachtype || 1
           # att.attachtype = 1
           att.copy_from = attachment.id
           att.save!
diff --git a/app/models/game.rb b/app/models/game.rb
index ae056a702..d81b794a5 100644
--- a/app/models/game.rb
+++ b/app/models/game.rb
@@ -31,7 +31,7 @@ class Game < ApplicationRecord
 
   # 根据得分比例来算实际得分(试卷、实训作业)
   def real_score score
-    (final_score.to_f / challenge.all_score) * score
+    ((final_score < 0 ? 0 : final_score).to_f / challenge.all_score) * score
   end
 
   # 判断实训是否全部通关
diff --git a/app/views/courses/search_teacher_candidate.json.jbuilder b/app/views/courses/search_teacher_candidate.json.jbuilder
index 33bed4100..49109b729 100644
--- a/app/views/courses/search_teacher_candidate.json.jbuilder
+++ b/app/views/courses/search_teacher_candidate.json.jbuilder
@@ -1,7 +1,7 @@
 json.candidates do
   json.array! @users do |user|
     json.id user.id
-    json.name user.firstname + user.lastname
+    json.name user.real_name
     json.nickname user.nickname
     json.school_name user.user_extension.school.try(:name)
     json.school_id user.user_extension.school.try(:id)
diff --git a/db/migrate/20190723152256_delete_contents_is_null_for_challenge_answers.rb b/db/migrate/20190723152256_delete_contents_is_null_for_challenge_answers.rb
new file mode 100644
index 000000000..a85152894
--- /dev/null
+++ b/db/migrate/20190723152256_delete_contents_is_null_for_challenge_answers.rb
@@ -0,0 +1,6 @@
+class DeleteContentsIsNullForChallengeAnswers < ActiveRecord::Migration[5.2]
+  def change
+    contents = ChallengeAnswer.where("contents = ''")
+    contents.delete_all
+  end
+end
diff --git a/public/images/educoder/nodata.png b/public/images/educoder/nodata.png
index 15a9e522f..ad4c76b97 100644
Binary files a/public/images/educoder/nodata.png and b/public/images/educoder/nodata.png differ
diff --git a/public/react/src/AppConfig.js b/public/react/src/AppConfig.js
index 554cb5bcb..003ef5a9b 100644
--- a/public/react/src/AppConfig.js
+++ b/public/react/src/AppConfig.js
@@ -2,7 +2,7 @@ import React from "react";
 
 import axios from 'axios';
 import { requestProxy } from "./indexEduplus2RequestProxy";
-import { broadcastChannelOnmessage ,SetAppModel} from 'educoder';
+import { broadcastChannelOnmessage ,SetAppModel, isDev, queryString} from 'educoder';
 import {  notification } from 'antd';
 import './index.css'
 broadcastChannelOnmessage('refreshPage', () => {
@@ -18,10 +18,19 @@ function locationurl(list){
 }
 
 // TODO 开发期多个身份切换
-const debugType =""
-// 	window.location.search.indexOf('debug=t') != -1 ? 'teacher' :
-//         window.location.search.indexOf('debug=s') != -1 ? 'student' : 'admin'
-// window._debugType = debugType;
+let debugType = ""
+if (isDev) {
+  	const _search = window.location.search;
+    let parsed = {};
+    if (_search) {
+      parsed = queryString.parse(_search);
+  	}
+    debugType = window.location.search.indexOf('debug=t') != -1 ? 'teacher' :
+        window.location.search.indexOf('debug=s') != -1 ? 'student' : 
+        window.location.search.indexOf('debug=a') != -1 ? 'admin' : parsed.debug || ''
+}
+	
+window._debugType = debugType;
 export function initAxiosInterceptors(props) {
 
     // TODO 避免重复的请求 https://github.com/axios/axios#cancellation
diff --git a/public/react/src/modules/comment/Comments.js b/public/react/src/modules/comment/Comments.js
index 1b2e2b45a..ce5cc8017 100644
--- a/public/react/src/modules/comment/Comments.js
+++ b/public/react/src/modules/comment/Comments.js
@@ -574,7 +574,7 @@ class Comments extends Component {
 							<div className="edu-tab-con-box clearfix edu-txt-center">
 								<img className="edu-nodata-img mb20"
 										 src={getImageUrl("images/educoder/nodata.png")} />
-								<p className="edu-nodata-p mb20">暂时还没有评论~</p>
+								<p className="edu-nodata-p mb20">暂时还没有相关数据哦！</p>
 							</div>
 					</div>
 						: '' }
diff --git a/public/react/src/modules/courses/Resource/index.js b/public/react/src/modules/courses/Resource/index.js
index 34fe53e4f..f83b525ee 100644
--- a/public/react/src/modules/courses/Resource/index.js
+++ b/public/react/src/modules/courses/Resource/index.js
@@ -956,7 +956,7 @@ class Fileslists extends Component{
             >
               <div className="edu-tab-con-box clearfix edu-txt-center">
 								<img className="edu-nodata-img mb20"  src="/images/educoder/nodata.png" />
-                <p className="edu-nodata-p mb20">暂无数据哦~</p></div>
+                <p className="edu-nodata-p mb20">暂时还没有相关数据哦！</p></div>
             </div>
 
 
diff --git a/public/react/src/modules/courses/coursesHome/CoursesHome.js b/public/react/src/modules/courses/coursesHome/CoursesHome.js
index 3f4b4ad12..962413e54 100644
--- a/public/react/src/modules/courses/coursesHome/CoursesHome.js
+++ b/public/react/src/modules/courses/coursesHome/CoursesHome.js
@@ -145,7 +145,7 @@ class CoursesHome extends Component{
 
 					{coursesHomelist===undefined?"":coursesHomelist.courses.length===0?<div className="edu-tab-con-box clearfix edu-txt-center mb50">
 						<img className="edu-nodata-img mb20" src={getImageUrl("images/educoder/nodata.png")}/>
-						<p className="edu-nodata-p mb20">暂无数据哦~</p>
+						<p className="edu-nodata-p mb20">暂时还没有相关数据哦！</p>
 					</div>:""}
 
             {
diff --git a/public/react/src/modules/courses/coursesPublic/NoneData.js b/public/react/src/modules/courses/coursesPublic/NoneData.js
index 9e23cbe2e..8c280b6c5 100644
--- a/public/react/src/modules/courses/coursesPublic/NoneData.js
+++ b/public/react/src/modules/courses/coursesPublic/NoneData.js
@@ -9,7 +9,7 @@ class NoneData extends Component{
     return(
       <div className="edu-tab-con-box clearfix edu-txt-center">
         <img className="edu-nodata-img mb20" src={getImageUrl("images/educoder/nodata.png")}/>
-        <p className="edu-nodata-p mb20">暂无数据哦~</p>
+        <p className="edu-nodata-p mb20">暂时还没有相关数据哦！</p>
       </div>
     )
   }
diff --git a/public/react/src/modules/courses/graduation/tasks/index.js b/public/react/src/modules/courses/graduation/tasks/index.js
index ac2a226bd..08639b521 100644
--- a/public/react/src/modules/courses/graduation/tasks/index.js
+++ b/public/react/src/modules/courses/graduation/tasks/index.js
@@ -773,7 +773,7 @@ class GraduationTasks extends Component{
           >
           <div className="edu-tab-con-box clearfix edu-txt-center">
             <img className="edu-nodata-img mb20" src="/images/educoder/nodata.png" />
-            <p className="edu-nodata-p mb20">暂无数据哦~</p></div>
+            <p className="edu-nodata-p mb20">暂时还没有相关数据哦！</p></div>
           </div>
 
         <div>
diff --git a/public/react/src/modules/courses/shixunHomework/ShixunStudentWork.js b/public/react/src/modules/courses/shixunHomework/ShixunStudentWork.js
index 8dd33bcd3..0c808e01d 100644
--- a/public/react/src/modules/courses/shixunHomework/ShixunStudentWork.js
+++ b/public/react/src/modules/courses/shixunHomework/ShixunStudentWork.js
@@ -838,7 +838,7 @@ class ShixunStudentWork extends Component {
 							{datalist === undefined ? "" : datalist.length===0? <div className="alltask">
 								<div className="edu-tab-con-box clearfix edu-txt-center">
 									<img className="edu-nodata-img mb20" src="/images/educoder/nodata.png" />
-									<p className="edu-nodata-p mb20">暂无数据哦~</p>
+									<p className="edu-nodata-p mb20">暂时还没有相关数据哦！</p>
 								</div>
 							</div>:<Table
 								dataSource={datalist}
diff --git a/public/react/src/modules/courses/shixunHomework/shixunHomework.js b/public/react/src/modules/courses/shixunHomework/shixunHomework.js
index 78ee31e82..504dd9c57 100644
--- a/public/react/src/modules/courses/shixunHomework/shixunHomework.js
+++ b/public/react/src/modules/courses/shixunHomework/shixunHomework.js
@@ -1203,7 +1203,7 @@ class ShixunHomework extends Component{
             >
               <div className="edu-tab-con-box clearfix edu-txt-center"><img className="edu-nodata-img mb20"
                                                                             src="/images/educoder/nodata.png" />
-                <p className="edu-nodata-p mb20">暂无数据哦~</p></div>
+                <p className="edu-nodata-p mb20">暂时还没有相关数据哦！</p></div>
             </div>
       </Spin>
 
diff --git a/public/react/src/modules/paths/ShixunPathCard.js b/public/react/src/modules/paths/ShixunPathCard.js
index d538ad255..9260b9f46 100644
--- a/public/react/src/modules/paths/ShixunPathCard.js
+++ b/public/react/src/modules/paths/ShixunPathCard.js
@@ -68,7 +68,7 @@ class ShixunPathCard extends Component{
           ):(
             <div className="edu-tab-con-box clearfix edu-txt-center mb50">
               <img className="edu-nodata-img mb20" src={getImageUrl("images/educoder/nodata.png")}/>
-              <p className="edu-nodata-p mb20">暂无数据哦~</p>
+              <p className="edu-nodata-p mb20">暂时还没有相关数据哦！</p>
             </div>
           )
         }
diff --git a/public/react/src/modules/tpm/shixunchild/Challenges/Challenges.js b/public/react/src/modules/tpm/shixunchild/Challenges/Challenges.js
index 85b0920e0..f5d57ae21 100644
--- a/public/react/src/modules/tpm/shixunchild/Challenges/Challenges.js
+++ b/public/react/src/modules/tpm/shixunchild/Challenges/Challenges.js
@@ -348,14 +348,14 @@ class Challenges extends Component {
                 <div className="edu-tab-con-box clearfix edu-txt-center">
                   <img className="edu-nodata-img mb20"
                        src={getImageUrl("images/educoder/nodata.png")} />
-                  <p className="edu-nodata-p mb20">暂无数据哦~</p>
+                  <p className="edu-nodata-p mb20">暂时还没有相关数据哦！</p>
                 </div>
               </div> : ChallengesDataList.challenge_list === undefined ?
                 <div className="alltask">
                   <div className="edu-tab-con-box clearfix edu-txt-center">
                     <img className="edu-nodata-img mb20"
                          src={getImageUrl("images/educoder/nodata.png")} />
-                    <p className="edu-nodata-p mb20">暂无数据哦~</p>
+                    <p className="edu-nodata-p mb20">暂时还没有相关数据哦！</p>
                   </div>
                 </div>
                 : ChallengesDataList.challenge_list.length === 0 ?
@@ -363,7 +363,7 @@ class Challenges extends Component {
                     <div className="edu-tab-con-box clearfix edu-txt-center">
                       <img className="edu-nodata-img mb20"
                            src={getImageUrl("images/educoder/nodata.png")} />
-                      <p className="edu-nodata-p mb20">暂无数据哦~</p>
+                      <p className="edu-nodata-p mb20">暂时还没有相关数据哦！</p>
                     </div>
                   </div>
                   : ChallengesDataList.challenge_list.map((item, key) => {
diff --git a/public/react/src/modules/tpm/shixunchild/Propaedeutics/Propaedeu_tics.js b/public/react/src/modules/tpm/shixunchild/Propaedeutics/Propaedeu_tics.js
index 7582f52e4..a2b20415d 100644
--- a/public/react/src/modules/tpm/shixunchild/Propaedeutics/Propaedeu_tics.js
+++ b/public/react/src/modules/tpm/shixunchild/Propaedeutics/Propaedeu_tics.js
@@ -92,7 +92,7 @@ class Propaedeutics extends Component {
                       <div className="alltask">
                         <div className="edu-tab-con-box clearfix edu-txt-center">
                           <img className="edu-nodata-img mb20" src={getImageUrl("images/educoder/nodata.png")}/>
-                          <p className="edu-nodata-p mb20">暂无数据哦~</p>
+                          <p className="edu-nodata-p mb20">暂时还没有相关数据哦！</p>
                         </div>
                       </div>
                     </div>
diff --git a/public/react/src/modules/tpm/shixunchild/Repository/Repository.js b/public/react/src/modules/tpm/shixunchild/Repository/Repository.js
index acdeb616b..c888ba6d8 100644
--- a/public/react/src/modules/tpm/shixunchild/Repository/Repository.js
+++ b/public/react/src/modules/tpm/shixunchild/Repository/Repository.js
@@ -164,7 +164,7 @@ class Repository extends Component {
                 trees === undefined || trees === null ? <div className="alltask">
                     <div className="edu-tab-con-box clearfix edu-txt-center">
                       <img className="edu-nodata-img mb20" src={getImageUrl("images/educoder/nodata.png")}/>
-                      <p className="edu-nodata-p mb20">暂无数据哦~</p>
+                      <p className="edu-nodata-p mb20">暂时还没有相关数据哦！</p>
                     </div>
                   </div> :
                   <div>
diff --git a/public/react/src/modules/tpm/shixuns/ShixunCard.js b/public/react/src/modules/tpm/shixuns/ShixunCard.js
index 18e261bb5..ae6aa696d 100644
--- a/public/react/src/modules/tpm/shixuns/ShixunCard.js
+++ b/public/react/src/modules/tpm/shixuns/ShixunCard.js
@@ -64,7 +64,7 @@ class ShixunCard extends Component {
           <div className="square-list clearfix">
             <div className="edu-tab-con-box clearfix edu-txt-center">
               <img className="edu-nodata-img mb20" src={getImageUrl("images/educoder/nodata.png")}/>
-              <p className="edu-nodata-p mb20">暂无数据哦~</p>
+              <p className="edu-nodata-p mb20">暂时还没有相关数据哦！</p>
             </div>
           </div>
           <div className="educontent edu-txt-center mb80">
diff --git a/public/stylesheets/educoder/edu-main.css b/public/stylesheets/educoder/edu-main.css
index 3777201b4..af2725447 100644
--- a/public/stylesheets/educoder/edu-main.css
+++ b/public/stylesheets/educoder/edu-main.css
@@ -444,8 +444,9 @@ ul.abouttable li .minh-label{min-width: 150px;height: 28px;line-height: 28px;tex
 .allNone tr{height: 30px!important;}
 
 /*数据为空公共页面*/
-img.edu-nodata-img{ width:300px; margin:50px auto 20px; display: block;}
-.edu-nodata-p{ font-size: 20px; text-align: center; color:#999;border-bottom:none!important;padding-left: 18px;box-sizing: border-box;}
+img.edu-nodata-img{ width:300px; margin:50px auto 20px; display: block; width: 128px;}
+/* 不能加 padding-left: 18px; 会影响其他地方的居中 */
+.edu-nodata-p{ font-size: 20px; text-align: center; color:#999;border-bottom:none!important;box-sizing: border-box;}
 
 /*输入为空或者错误的提示*/
 .input-none{box-shadow: 0px 0px 2px rgba(0,0,0,0.1);}