如何制作它以使其不刷新页面?相反它只会更新计数?任何帮助将不胜感激!
故事控制者:
def like
like = Like.create(like: params[:like], user: current_user, story: @story)
if like.valid?
flash[:success] = "Your selection was succesful"
redirect_to :back
else
flash[:danger] = "You can only like/dislike a story once"
redirect_to :back
end
end
index.html.erb:
<div class="pull-right">
<%= link_to like_story_path(story, like: true), :method => :put, :remote => true do %>
<i class="glyphicon glyphicon-thumbs-up"></i><%= story.thumbs_up_total %>
<% end %>
<%= link_to like_story_path(story, like: false), :method => :put, :remote => true do %>
<i class="glyphicon glyphicon-thumbs-down"></i><%= story.thumbs_down_total %>
<% end %>
</div>
Story.rb模型:
def thumbs_up_total
self.likes.where(like: true).size
end
def thumbs_down_total
self.likes.where(like: false).size
end
答案 0 :(得分:1)
控制器应respond_to
js
“格式”,如Working with JavaScript in Rails中所述。
而不是redirect_to :back
,使用有意义的状态代码进行响应,例如201表示成功(创建新资源时)或400表示错误请求。
请参阅RFC 2616, section 10 - Status Code Definitions。
然后,在您的JS中,处理ajax:success
事件。这也在Working with JavaScript in Rails中描述。
答案 1 :(得分:0)
让我举个例子: 首先更改您的StoriesController,如下所示:
def like
@like = Like.create(like: params[:like], user: current_user, story: @story)
if @like.valid?
respond_to do|format|
format.js
end
else
respond_to do|format|
format.js {render status: 403, js: "alert('You can only like/dislike a story once'"}
end
end
end
在故事视图目录中创建一个名为like.js.erb的文件,其中包含以下内容。
<% if @like.like %>
var $element = $(".glyphicon.glyphicon-thumbs-up");
<% else %>
var $element = $(".glyphicon.glyphicon-thumbs-down");
<% end %>
var oldCount = parseIn($element.text());
$element.text(oldCount + 1);
除了这些示例之外,你至少应该Rails Guide才能在rails中有效地使用ajax。这并不困难。