ruby-on-rails - 遵循对象所有实例的操作

Question

目前，我在为一个用户显示关注/取消关注按钮时拥有全部功能。 我能够正确地关注和取消关注任何用户。

但是，当显示所有用户的列表并在每个用户上显示关注/取消关注按钮时。

当我点击关注时，我得到了。

我得到undefined local variable or method `following' for #<#:0x007fa8a9b4f448> 在 _unfollow.html.erb 的第二行 - 完整错误请参见下面的照片

我在渲染局部时传入变量。

<%= render 'follow_aud_form', :following => following if signed_in? %> 

我还能够检查“following”并查看实例数据。

点击后返回时，它实际上是关注/取消关注所选用户，但是它首先产生错误

见下面的代码

用户 Controller

def following
 @title = "Following"
 @user = User.find(params[:id])
 @users = @user.followed_users
 render 'show_follow'
end

def followers
  @title = "Followers"
  @user = User.find(params[:id])
  @users = @user.followers
  render 'show_follow'
end

show_follow.html.erb

<% @users.each do |following|%>

        <div class="span1">
          <%= render 'follow_aud_form', :following => following if signed_in? %>
        </div>

    <% end %>

关注aud_form

<div id="follow_form">
  <% if current_user.following?(following) %>
    <%= render 'unfollow', :following => following %>
  <% else %>
    <%= render 'follow', :following => following %>
  <% end %>
  </div>

_follow_html

|__<%= @gaza_id = following.id %>__|
<%= form_for(current_user.relationships.build(followed_id: @gaza_id)) do |f| %>
  <div><%= f.hidden_field :followed_id %></div>
  <%= f.submit "Follow",:type => :image, :src => "/assets/follow.png" %>
<% end %>

_unfollow.html

|__<%= @slim_id = following.id %>__|
<%= form_for(current_user.relationships.find_by_followed_id(@slim_id),
             html: { method: :delete }) do |f| %>
  <%#= f.submit "Unfollow", class: "btn btn-large" %>
  <%= f.submit "Unfollow",:type => :image, :src => "/assets/following.png" %>
<% end %>

我还查看了 Users list with follow/unfollow button

Answer 1

只需尝试将 _show_follow.html.erb 更改为:

<% @users.each do |following|%>

    <div class="span1">
      <% f = signed_in? ? following : ''
      <%= render 'follow_aud_form', :following => f %>
    </div>

<% end %>

我相信您遇到的唯一问题是，除非用户已登录，否则不会创建本地变量 :following。提议的更改只是确保无论如何都会创建本地变量。