将Javascript变量传递给Rails局部函数 [英] Passing Javascript variables to Rails partials

问题描述

我是Rails的新手，我正在努力完成一项看似简单的任务. 我有一个(简化的)表格:

I am new in Rails and I am struggling on an apparently easy task. I have a (stripped down) form:

<%= form_for @order, html: { :class => 'form-inline' } do |f| %>
  <fieldset>
  <legend><%= params[:action].capitalize %> Order</legend>

  <table class="table">
    <thead>
      <tr>
        <th><%= f.label :symbol %></th>
        <th><%= f.label :price %></th>
      </tr>
    </thead>

    <tbody>
      <tr>
        <td><%= f.text_field :symbol, class: 'input-small' %></td>
        <td><%= f.text_field :price, class: 'input-small' %></td>
      </tr>
    </tbody>
  </table>

  <div id='here'></div>

  <%= f.submit "Submit", class: "btn btn-primary" %>

  </fieldset>
<% end %>

<%= link_to 'Get quote', view_quote_orders_path, remote: true %>

当我单击获取报价"并且符号文本字段失去焦点时，我想在div $(#here)中的Google财务中提供报价. 我已经编写了用于提取Ruby中引号的代码.

I want to render the quotation in google finance in the div $(#here) when I click on 'Get quote' and when the symbol text field loses focus. I have already written the code to extract the quotation in Ruby.

在routes.rb中，我添加了:

In routes.rb I added:

  resources :orders do
    get 'view_quote', on: :collection
  end

在order_controller.rb中，我添加了:

In order_controller.rb I added:

def view_quote
  respond_to do |format|
    format.js { render :layout => false }
  end
end

并在view_quote.js.erb中:

and in view_quote.js.erb:

sym = $('.orders #order_symbol').val();
$('#quotes').html("<%=j render 'googlequote', symbol: sym %>");

和_googlequote.html.erb中(我将在其中放入提取引用的逻辑中):

and in _googlequote.html.erb (where I will put the logic to extract the quotation):

<%= symbol %>

该错误在view_quote.js.erb中，因为sym是未定义的. 如果我将第二行替换为:

The error is in view_quote.js.erb, because sym is undefined. If I replace the second line with:

$('#quotes').html("<%=j render 'googlequote', symbol: 'just_a_test' %>");

部分已渲染，但是我当然不需要它. 如何将javascript变量sym传递给部分_googlequote.html.erb? 否则，有没有更好的方法可以实现我的目标?

the partial is rendered, but of course I don't need it. How can I pass the javascript variable sym to the partial _googlequote.html.erb? Otherwise, is there a better way to accomplish my objective?

推荐答案

您不能将其放在erb中，因为erb在服务器上呈现.实现此目的的一种方法是将符号用作view_quote的参数，因此您可能会遇到以下情况:

You can't put it in erb, because erb is rendered on the server. One way to accomplish this would be to use the symbol as a param to view_quote, so you could have something like:

$('#quotes').html("<%=j render 'googlequote', symbol: params[:sym] %>");

(当然，您可以更REST地连接该参数，但这是一个不错的起点).

(of course, you can wire up that param more RESTfully, but this is a good starting point).

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