班级分班进行删除时，根据是否有成员，做不同的提示

app/controllers/courses_controller.rb

@@ -227,7 +227,15 @@ class CoursesController < ApplicationController
   end
 
   def deletegroup
-    CourseGroup.delete(params[:group_id])
+    group = CourseGroup.find params[:group_id]
+    if group
+      if group.members.count == 0
+        CourseGroup.delete(params[:group_id])
+      else
+        group.members.update_all(:course_group_id => 0)
+        CourseGroup.delete(params[:group_id])
+      end
+    end
     @subPage_title = l :label_student_list
     @canShowCode = isCourseTeacher(User.current.id,@course) && params[:role] != '1'
     @is_remote = true
@@ -395,6 +403,7 @@ class CoursesController < ApplicationController
       page_from = params[:page].nil? ? 0 : (params[:page].to_i - 1)
       @results = student_homework_score(0,page_from, 10,"desc")
     end
+    @no_group_count = @course.student.count - @course.members.where("course_group_id != 0").count
     @course_groups = @course.course_groups
     @limit = 50
     @page = params[:page].nil? ? 1 : params['page'].to_i

app/views/courses/_delete_member_group.html.erb

@@ -0,0 +1,14 @@
+<br>
+<div style='width:360px;text-align:center;font-family: "微软雅黑","宋体"' class="f14">
+  <% if count == 0 %>
+      确定删除分班吗？
+  <% else %>
+      已有学生加入本分班，删除之后，这些学生将处于未分班状态
+      您是否确定删除该分班
+  <% end %>
+</div>
+</br>
+<div style='width:164px; margin:0 auto; text-align:center; font-family: "微软雅黑","宋体"'>
+  <%=link_to '确定', deletegroup_course_path(:group_id => group_id), :method => 'delete', :remote => true, :class => 'Blue-btn fl', :method => 'delete'%>
+  <a href='javascript:void(0);' class='Blue-btn fl' onclick='hideModal()'>取消</a>
+</div>

app/views/courses/_new_groups_name.html.erb

@@ -10,20 +10,27 @@
 
   <% unless course_groups.nil? %>
       <% course_groups.each do |group| %>
+          <script>
+              function delete_group_<%= group.id%>(){
+                  var htmlvalue = '<%=escape_javascript(render :partial => 'delete_member_group', :locals => {:group_id => group.id, :count => group.members.count}) %>';
+                  pop_up_box(htmlvalue, 400);
+              }
+          </script>
           <%# group_name = " #{ group.name}( <span class='c_red'>#{group.members.count.to_s}人</span>)".html_safe %>
           <li class="fl sy_fenban_list clear mr10 mb10">
             <%= link_to group.name, searchgroupmembers_course_path(@course,:group_id => group.id), class: 'fl mr5', method: 'get', remote: true,:onclick => "checkclass('group_name_#{group.id}')"%>
             <span class="fl sy_cgrey mr5">(<%=group.members.count.to_s %>人)</span>
             <% if @canShowCode%>
                 <a href="javascript:void(0)" class="sy_icons_edit fl" onclick="$('#edit_group_name').val('<%= group.name%>');$('#edit_group_id').val('<%= group.id%>');$('#edit_group_form').slideToggle();"></a>
-                <% if group.members.empty?%>
+                <%# if group.members.empty?%>
-                    <%= link_to '', deletegroup_course_path(:group_id => group.id), :method => 'delete', :remote => true,
+                    <%#= link_to '', deletegroup_course_path(:group_id => group.id), :method => 'delete', :remote => true,
                                 :data => {confirm: l(:label_delete_group)},
                                 :class => 'sy_icons_del fl'
                   %>
-                <% else%>
+                    <!--<a href="javascript:void(0)" onClick="pop_up_box('<%#=escape_javascript(render :partial => 'delete_no_member_group', :locals => {:group_id => group.id}) %>');" class="sy_icons_del fl"></a>-->
-                    <a href="javascript:void(0)" onClick="alert('温馨提示：已有学生加入该班级，不能删除该班级，仅可编辑班级名称。');" class="sy_icons_del fl"></a>
+                <%# else%>
-                <% end%>
+                    <a href="javascript:void(0)" onClick="delete_group_<%= group.id%>();" class="sy_icons_del fl"></a>
+                <%#end%>
             <% end %>
           </li>
       <% end %>

app/views/courses/deletegroup.js.erb

@@ -1,2 +1,3 @@
+hideModal();
 $("#st_groups").html("<%= escape_javascript(  render :partial => 'new_groups_name', locals: {:course_groups => @course_groups})%>");
 $("#member_content").html("<%= escape_javascript( render :partial => 'new_member_list', :locals => {:members => @members})%>");