Ajax中未更新counter_cache [英] counter_cache not updated in ajax

问题描述

我有一个运行的js代码，单击了一个喜欢的链接(使用ajax)-链接更改为不相同(使用正确的路线和方法)，并且我希望对likes_count(该模型中的列)进行更新也是

I have a js code that is run a like link is clicked (with ajax) - The link changes to unlike (with the proper route and method), and I want the likes_count which is a column in the model to be updated as well.

问题是该值不会更新.没有Ajax(整页加载)时-值确定

The thing is that the value doesn't get updated. With no Ajax (full page load) - the value is OK

#create.js.erb
$("#like_link").html("<%= escape_javascript(render("artworks/unlike")) %>")
$("#likes").html('<%= @artwork.likes_count %>')

#relevant html snippet from the view
<div>
  Total likes: <span id="likes"><%= @artwork.likes_count %></span>  
</div>

#model - like.rb
class Like < ActiveRecord::Base
  belongs_to :user
  belongs_to :artwork, :counter_cache => true
end

使用时
$(#likes").html('<％= @ artwork.count％>')
它有效，但是缺少counter_cache的要点

When using
$("#likes").html('<%= @artwork.count %>')
It works but missing the point of counter_cache

推荐答案

在您的create方法中，恰好在保存对象之后，您应该 reload 您喜欢的对象，如下所示:

in your create method, exactly after saving your object, you should reload the object that you like it, something like this :

def create
    # some code
    if @like.save
        @artwork.reload # use reload to get the updated counter cache value
    end
end

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