forgeplus/app/views/admins/feedbacks/_list.html.erb

<table class="table table-hover text-center subject-list-table">
  <thead class="thead-light">
  <tr>
    <th width="5%">序号</th>
    <th width="10%">用户名</th>
    <th width="20%">用户邮箱</th>
    <th width="20%"><%= sort_tag('创建时间', name: 'created_at', path: admins_feedbacks_path) %></th>
    <th width="25%">反馈意见</th>
    <th width="15%">操作</th>
  </tr>
  </thead>
  <tbody>
  <% if feedbacks.present? %>
    <% feedbacks.each_with_index do |feedback, index| %>
      <tr class="feedback-item-<%= feedback.id %>">
        <td><%= list_index_no((params[:page] || 1).to_i, index) %></td>
        <td><%= feedback&.user&.login%></td>
        <td><%= feedback&.user&.mail%></td>
        <td><%= feedback.created_at&.strftime('%Y-%m-%d %H:%M') %></td>
        <td>
          <span class="d-inline-block" tabindex="0" data-toggle="tooltip" data-placement="left" title="<%= feedback.content%>">
            <a href="javascript:">
              <%= feedback.content.truncate(20) %>
            </a>
          </span>
        </td>
        <td class="action-container">
          <%= link_to "发送邮件", new_history_admins_feedback_path(feedback), remote: true, class: "action" %>
          <%#= link_to "删除", admins_feedback_path(feedback), method: :delete, data:{confirm: "确认删除的吗？"}, class: "action" %>
        </td>
      </tr>
    <% end %>
  <% else %>
    <%= render 'admins/shared/no_data_for_table' %>
  <% end %>
  </tbody>
</table>

<%= render partial: 'admins/shared/paginate', locals: { objects: feedbacks } %>

<style>
.tooltip-inner {
    max-width: 800px;
    /* width: inherit; will take up least amount of space  */
}
</style>