diff --git a/app/controllers/concerns/git_common.rb b/app/controllers/concerns/git_common.rb
index 93f5fecd7..b8b2ec10a 100644
--- a/app/controllers/concerns/git_common.rb
+++ b/app/controllers/concerns/git_common.rb
@@ -47,6 +47,7 @@ module GitCommon
   def add_file
     @path, message, content = params[:path].strip, params[:message], params[:content]
     author_name, author_email = current_user.real_name, current_user.git_mail
+    Rails.logger.info(" good repo_name is #{@repo_path}")
     @content = GitService.update_file(repo_path: @repo_path,
                                       file_path: @path,
                                       message: message,
diff --git a/app/controllers/homework_banks_controller.rb b/app/controllers/homework_banks_controller.rb
index a812da751..7e10509ba 100644
--- a/app/controllers/homework_banks_controller.rb
+++ b/app/controllers/homework_banks_controller.rb
@@ -11,7 +11,12 @@ class HomeworkBanksController < ApplicationController
 
   def update
     ActiveRecord::Base.transaction do
-      @bank.update_attributes(name: params[:name], description: params[:description], reference_answer: params[:reference_answer])
+      if @bank.homework_type == 1
+        @bank.update_attributes(name: params[:name], description: params[:description], reference_answer: params[:reference_answer])
+      elsif @bank.homework_type == 3
+        @bank.update_attributes(name: params[:name], description: params[:description], reference_answer: params[:reference_answer],
+                                base_on_project: params[:base_on_project], min_num: params[:min_num], max_num: params[:max_num])
+      end
 
       # 作业描述的附件
       Attachment.associate_container(params[:attachment_ids], @bank.id, @bank.class) if params[:attachment_ids]
diff --git a/app/views/games/picture_display.json.jbuilder b/app/views/games/picture_display.json.jbuilder
index eb2309f9b..7fdc2cfc1 100644
--- a/app/views/games/picture_display.json.jbuilder
+++ b/app/views/games/picture_display.json.jbuilder
@@ -19,7 +19,7 @@ if @type == "image"
   end
 
 elsif @type == "html"
-  json.iframe_src File.read("#{@user_path}/#{@user_picture[0]}")&.html_safe
+  json.iframe_src File.read("#{@user_path}/#{@user_picture[0]}")&.html_safe if @user_picture[0].present?
 elsif @type == "txt"
   json.contents @contents.to_s
 elsif @type =="qrcode"
diff --git a/db/migrate/20190830082934_add_tag_to_libraries.rb b/db/migrate/20190830082934_add_tag_to_libraries.rb
new file mode 100644
index 000000000..ea40cda5d
--- /dev/null
+++ b/db/migrate/20190830082934_add_tag_to_libraries.rb
@@ -0,0 +1,5 @@
+class AddTagToLibraries < ActiveRecord::Migration[5.2]
+  def change
+    execute "insert into library_tags(name) values('企业案例')"
+  end
+end
diff --git a/public/react/src/context/EvaluateSuccessEffectDisplay.js b/public/react/src/context/EvaluateSuccessEffectDisplay.js
index ec34db31f..98e61520b 100644
--- a/public/react/src/context/EvaluateSuccessEffectDisplay.js
+++ b/public/react/src/context/EvaluateSuccessEffectDisplay.js
@@ -21,7 +21,7 @@ class EvaluateSuccessEffectDisplay extends Component {
     componentDidMount() {
         if (this.props.type == 'html') {
             const iframe = document.getElementById('_displayIframe')
-            if (iframe && iframe.contentWindow) {
+            if (iframe && iframe.contentWindow && this.props.iframe_src) {
                 iframe.contentWindow.open()
                 iframe.contentWindow.document.write(this.props.iframe_src);
                 iframe.contentWindow.document.close();