Question

我目前正在使用partial来将一个like /不同的按钮渲染到两个不同的视图上：一个主题视图和一个user_bookmarks视图。我不知道如何在主题视图页面上单击like /不同按钮时重定向到主题视图，并在类似/不同按钮的代码被点击时，当点击like /不同按钮时重定向到user_bookmarks视图从部分拉出来。

这是我的部分代码：

<% show_remove_button ||= false %> 

<li><%= bookmark.url %></li>
 <div class="like">        
      <% if show_remove_button %>     
          <%= link_to "Remove", user_bookmark_path(get_user_bookmark_for(bookmark)), method: :delete %>
      <% else %>    
        <% if like = current_user.liked(bookmark) %>
          <%= link_to [bookmark, like], method: :delete do %><u>Unlike</u><% end %>
        <% else %>
          <%= link_to [bookmark, Like.new], method: :post do %><u>Like</u><% end %>
       <% end %> 
    <% end %>
</div>

以下是我的主题观点：

<h1>All Bookmarks</h1>

<ul class="topics">
    <% @topics.each do |topic| %>
      <li><%= link_to "##{topic.name}", topic %></li>
      <ul class="bookmarks">
        <%= render topic.bookmarks %>
      </ul>    
    <% end %>
</ul>
<br>

这是我的user_bookmarks视图：

    <h1>My Bookmarks</h1>

    <ul class="topics">    
        <% @topics.each do |topic| %>
          <li><%= link_to "##{topic.name}", topic %></li>
          <ul class="bookmarks">
            <% topic.bookmarks.each do |bookmark| %>
              <%= render partial: "bookmarks/bookmark", object: bookmark, locals: {show_remove_button: true} %>
            <% end %>
          </ul>    
        <% end %>
    </ul>
    <br>

    <h1>My Likes</h1> 

    <ul class="topics">
        <% @liked_topics.each do |topic| %>
          <li><%= link_to "##{topic.name}", topic %></li>
          <ul class="bookmarks">
             <% topic.bookmarks.each do |bookmark| %>
              <%= render partial: "bookmarks/bookmark", object: bookmark, locals: {show_remove_button: false} %>
            <% end %>
          </ul>    
        <% end %>
    </ul>
    <br>

And here is my likes controller:

class LikesController < ApplicationController
  def create
     @bookmark = Bookmark.find(params[:bookmark_id])
     like = current_user.likes.build(bookmark: @bookmark)

     if like.save
       flash[:notice] = "Liked bookmark"
       redirect_to topics_path
     else
       flash[:error] = "Unable to add like. Please try again."
      redirect_to topics_path
     end
  end

  def destroy
      @bookmark = Bookmark.find(params[:bookmark_id])
      like = current_user.likes.find(params[:id])

      if like.destroy
        flash[:notice] = "Removed like."
        redirect_to topics_path
      else
        flash[:error] = "Unable to remove like. Please try again."
        redirect_to topics_path
     end
    end
  end

提前感谢您的帮助！

Answer 1

如果我正确理解了问题，您想要根据您所在的视图切换呈现的视图。

您可以使用以下命令返回您来自的路径。

redirect_to URI(request.referrer).path

request.referrer是 request.env的快捷方式[＆＃39; REQUEST_REFERRER＆＃39;]

假设每个视图都有自己的路径，我会比较当前路径以决定做什么。

在您的控制器中，例如：

 if like.save
   flash[:notice] = "Liked bookmark"
 else
   flash[:error] = "Unable to add like. Please try again."
 end

 redirect_to URI(request.referrer).path

您会注意到我还从if语句中取出了重定向，因为它始终是阻止之后可以说明的终点。这是DRY代码的好习惯。

或者你可以设置条件，即

redirect_to URI(request.referrer).path == topic_path ? topic_path : bookmark_path

如果您在被称为三元运营商之前没有看到这一点。

condition ? do_this_if_true : do_this_if_false

在上面的上下文中，想象它是这样的：

if URI(request.referrer).path == topic_path
   topic_path
else
   bookmark_path
end

Answer 2

我终于使用redirect_to :back学习了对问题的简单修复。这是我喜欢的控制器：

class LikesController < ApplicationController
  def create
     @bookmark = Bookmark.find(params[:bookmark_id])
     like = current_user.likes.build(bookmark: @bookmark)

     if like.save
       flash[:notice] = "Liked bookmark"
       redirect_to :back
     else
       flash[:error] = "Unable to add like. Please try again."
      redirect_to :back
     end
  end

  def destroy
      @bookmark = Bookmark.find(params[:bookmark_id])
      like = current_user.likes.find(params[:id])

      if like.destroy
        flash[:notice] = "Removed like."
        redirect_to :back
      else
        flash[:error] = "Unable to remove like. Please try again."
        redirect_to :back
     end
    end
  end

如何使用部分重定向到2页

2 个答案: