Question

我正在阅读micheal hart ruby on rails tutrial，我在用户显示页面上有关注和取消关注按钮，但后来我尝试将其添加到用户索引页面索引页面我收到此错误

undefined method `id' for nil:NilClass

这是表单

的表单代码

<% user ||= current_user %>
<div id="follow_form">
<% if current_user.following? user %>
<%= form_for(current_user.active_relationships.find_by(followed_id: @user.id),html: { method: :delete },remote: true) do |f| %>
<%= f.submit "Unfollow", class: "waves-effect waves-light btn" %>
<% end %>
<% else %>
<%= form_for(current_user.active_relationships.build(followed_id: @user.id), remote: true) do |f| %>
<div><%= hidden_field_tag :followed_id, @user.id %></div>
<%= f.submit "Follow", class: "waves-effect waves-light btn" %>
<% end %>

<% end %>

添加后我仍然得到相同的错误。表单使用此<%= render @users %>进行渲染，部分包含此`

    </div>
    <div class="user-profile-inner">
        <h6 >
        <%= link_to user.name, user %></h4>
        <%= gravatar_all user %>
      <h5><%= user.position %></h5>

        <!-- User button -->
        <div class="user-button">
            <div class="row">

                  <% if current_user.admin? && !current_user?(user) %>
              <div class="col m6">
                 <%= link_to "delete", user, method: :delete,class: 'waves-effect waves-light btn red darken-4',

数据：{确认：＆＃34;你确定吗？＆＃34; }％＆gt;

                  <% end %>


                <div class="col m6">

                    <button type="button" class="btn btn-default btn-sm btn-block"><i class="fa fa-user"></i> <%= render "follow_form_user"  %>  </button>

                </div>
                     <div class="col m6">
                         <% unless current_user == @user %>
                         <%= link_to 'Send message', new_message_path(to: user.id), class: 'waves-effect waves-light btn' %>
                         <% end %>
                </div>
            </div>
        </div>
    </div>
</div>

`

我需要在其上添加代码吗？

Answer 1

我认为你这里没有@user个实例变量，只有user。在此处将@user替换为user。

如何跟随和取消关注链接是用户索引页面

1 个答案: