学校列表增加序号显示

app/views/admin/schools.html.erb

@@ -11,20 +11,26 @@
   <table class="list" style="width: 100%;table-layout: fixed">
     <thead>
     <tr>
-      <th>
+      <th style="width: 50px;">
+        序号
+      </th>
+      <th style="width: 100px;">
         LOGO
       </th>
       <th>
         学校名称
       </th>
-      <th></th>
+      <th style="width: 100px;"></th>
     </tr>
     </thead>
     <tbody>
     <% @schools.each do |school|%>
         <tr class="<%= cycle("odd", "even") %>">
+          <td  style="text-align:center;vertical-align: middle;">
+            <%= school.id %>
+          </td>
           <td align="center">
-            <%= image_tag(school.logo_link,width:46,height:46) %>
+            <%= image_tag(school.logo_link,width:40,height:40) %>
           </td>
           <td style="text-align:center;vertical-align: middle;white-space: nowrap;overflow: hidden;text-overflow: ellipsis;" class="name" title='<%=school.name%>'>
             <span>