Question

我有这个帮助链接

link_to "", product_path(product, anchor: "disqus_thread"), data: { "disqus-identifier" => "#{url_for([product, {only_path: false}])}" }, class: "no-underline bold grey-text text-darken-3 margin-left"

layout：application.rb

%script{id: "dsq-count-scr", src: "https://url.disqus.com/count.js", async: "async"}

_disqus.html.erb

<div class="col-lg-8 col-lg-offset-2 big-top-space margin-bottom">
  <div id="disqus_thread"></div>
  <script>
    var disqus_shortname = 'yourname';
    var disqus_identifier = '<%= url_for([product, {only_path: false}]) %>';
    var disqus_title = '<%= product.name %>';
    var disqus_url = '<%= url_for([product, {only_path: false}]) %>';
  (function() { // DON'T EDIT BELOW THIS LINE
     var d = document, s = d.createElement('script');
     s.src = 'https://url.disqus.com/embed.js';
     s.setAttribute('data-timestamp', +new Date());
     (d.head || d.body).appendChild(s);
  })();
</script>
<noscript>Please enable JavaScript to view the <a href="https://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript>

</div>

并且所有工作正常我得到一个数字，数字是我的索引视图中每个帖子的disqus评论计数器，但如果大于0，如何只显示数字？如果等于0 我不想在视图中显示它。有人知道如何解决这个问题吗？非常感谢

我试过这个：

将此列添加到产品comment_count：integer

我改变了我的_disqus.html

 <div class="col-lg-8 col-lg-offset-2 big-top-space margin-bottom">
      <div id="disqus_thread"></div>
      <script>
        var disqus_shortname = 'yourname';
        var disqus_identifier = '<%= url_for([product, {only_path: false}]) %>';
        var disqus_title = '<%= product.name %>';
        var disqus_url = '<%= url_for([product, {only_path: false}]) %>';

       var disqus_config = function () {
    this.callbacks.onNewComment = [
      function() {        
        $.ajax({
          method: "PATCH",
          url: '<%= product_path(product) %>',
          data: {increment: "comment_count"}
        })
      }
    ];
};
      (function() { // DON'T EDIT BELOW THIS LINE
         var d = document, s = d.createElement('script');
         s.src = 'https://url.disqus.com/embed.js';
         s.setAttribute('data-timestamp', +new Date());
         (d.head || d.body).appendChild(s);
      })();
    </script>
    <noscript>Please enable JavaScript to view the <a href="https://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript>

    </div>

Product_controller

def update    
    product = Product.find(params[:id])
    product.update(update_product)
  end
def update_product
  params.permit(:comment_count)
end

来源：https://help.disqus.com/customer/portal/articles/466258-capturing-disqus-commenting-activity-via-callbacks

但我收到此错误

   Started PATCH "/products/12" for ::1 at 2017-04-12 17:44:38 -0500
Processing by ProductsController#update as */*
Parameters: {"increment"=>"comment_count", "id"=>"12"}
ShoppingCart Load (0.0ms) SELECT "shopping_carts".* FROM "shopping_carts" WH
ERE "shopping_carts"."id" = ? LIMIT 1 [["id", 102]]
Product Load (0.0ms) SELECT "products".* FROM "products" WHERE "products"."i
d" = ? LIMIT 1 [["id", 12]]
CACHE (0.0ms) SELECT "products".* FROM "products" WHERE "products"."id" = ?
LIMIT 1 [["id", "12"]]
Unpermitted parameters: increment, id
(0.0ms) begin transaction
User Load (0.0ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? LIMIT
1 [["id", 1]]
(0.0ms) commit transaction
Rendered products/update.haml within layouts/application (0.0ms)
(0.0ms) SELECT COUNT(*) FROM "products" INNER JOIN "in_shopping_carts" ON "p
roducts"."id" = "in_shopping_carts"."product_id" WHERE "in_shopping_carts"."shop
ping_cart_id" = ? [["shopping_cart_id", 102]]
Rendered partials/_unlogged.haml (15.5ms)
Rendered partials/_nav.haml (765.8ms)
Completed 200 OK in 3476ms (Views: 3448.8ms | ActiveRecord: 0.0ms)

未经许可的参数：increment，id

在控制台

中

comment_count：nil

有人可以帮帮我吗？

Answer 1

我能想到解决这个问题的最佳方法是：

向数据库添加let state: (String) -> () func observeActiveTrackingState() { let pathToObserveState = databaseRef.child("locationState").child("\(userID!)") pathToObserveState.observeSingleEvent(of: .value, with: { (snapshot) in let snapshotValue = snapshot.value as? NSDictionary print("Snapshot Returned (ObserveActiveTrackingState) = \(snapshotValue?["state"] as! String)") let currentState = snapshotValue?["state"] as! String self.state(currentState) }) }属性
添加disqus comment_count回调以更新记录中的评论计数。

使用Javascript，您可以添加回调：

onNewComment

那么你会知道未来的评论数。

文档：https://help.disqus.com/customer/portal/articles/466258-capturing-disqus-commenting-activity-via-callbacks

将您的控制器更改为：

var disqus_config = function () {
    this.callbacks.onNewComment = [
      function() {
        alert(comment.id);
        alert(comment.text);
        $.ajax({
          method: "PATCH",
          url: "<%= product_path(product) %>",
          data: {increment: "comment_count"}
        })
      }
    ];
};

Answer 2

你不能 - 至少不是你尝试的方式。

link_to "", product_path(product, anchor: "disqus_thread"), data: { "disqus-identifier" => "#{url_for([product, {only_path: false}])}" }, class: "no-underline bold grey-text text-darken-3 margin-left"

在将页面发送到浏览器之前，会在Rails服务器上对此进行评估。

<script>
    var disqus_shortname = 'yourname';
    var disqus_identifier = '<%= url_for([product, {only_path: false}]) %>';
    var disqus_title = '<%= product.name %>';
    var disqus_url = '<%= url_for([product, {only_path: false}]) %>';
  (function() { // DON'T EDIT BELOW THIS LINE
     var d = document, s = d.createElement('script');
     s.src = 'https://url.disqus.com/embed.js';
     s.setAttribute('data-timestamp', +new Date());
     (d.head || d.body).appendChild(s);
  })();
</script>

此javascript稍后在客户端（用户浏览器）中运行 - 此时页面已由服务器发送。

如果您想知道何时在服务器端呈现，如果有任何评论，您需要从服务器调用Disqus API。

如何仅在返回＆gt;时显示link_to帮助器0

2 个答案: