评论回复不能为空

app/controllers/student_work_controller.rb

@@ -177,9 +177,12 @@ class StudentWorkController < ApplicationController
     @score = StudentWorksScore.find params[:score_id]
     @jour = @score.journals_for_messages.new(:user_id => User.current.id,:notes =>params[:message], :reply_id => 0)
     if @jour.save
-      respond_to do |format|
-        format.js
-      end
+      @status = 1
+    else
+      @status = 2
+    end
+    respond_to do |format|
+      format.js
     end
   end
 

app/views/student_work/add_score_reply.js.erb

@@ -1,2 +1,6 @@
 $("#add_score_reply_<%= @score.id%>").html("<%= escape_javascript(render :partial => 'add_score_reply', :locals => {:score => @score}) %>");
-$("#replay_histroy_<%= @score.id%>").prepend("<%= escape_javascript(render :partial => 'jour_replay', :locals => {:jour => @jour}) %>");
+<% if @status && @status == 1%>
+    $("#replay_histroy_<%= @score.id%>").prepend("<%= escape_javascript(render :partial => 'jour_replay', :locals => {:jour => @jour}) %>");
+<% else%>
+    alert("回复内容不能为空");
+<% end%>