将JavaScript变量传递给ruby-on-rails控制器

问题描述

如何从JavaScript侦听器传递变量（id）：

How can I pass a variable (id) from the JavaScript listener:

Gmaps.map.callback = function() {
    ...
    ...
    google.maps.event.addListener(marker, 'click', function() {
      var id = this.currentMarker;
      alert(id);
    });
   }
  }

到ruby中的实例变量（@foo） on-rails控制器

To the instance variable (@foo) in ruby-on-rails controller

def create
  @foo = ???
  ...
end

在视图中正确创建关系（ form）：

to correctly create a relationship in the view (form):

<%= form_for user.relationships.build(:followed_id => @foo.id) do |f|    %>
<div><%= f.hidden_field :followed_id %></div>
<div class="actions"><%= f.submit "Follow" %></div>
<% end %>

谢谢！

推荐答案

如果我理解正确，一个好方法是使用AJAX将id提交给你的动作并使用动作来渲染你的表格。

If I am understanding correctly, a good way to do this is to use AJAX to submit the id to your action and use the action to render your form.

在你的javascript中看起来像这样：

That would look something like this in your javascript:

jQuery.ajax({
  data: 'id=' + id,
  dataType: 'script',
  type: 'post',
  url: "/controller/action"
});

您需要一条路线：

post 'controller/action/:id' => 'controller#action'

然后在您的操作中，您可以获取该ID并将表单呈现为此类似：

Then in your action you can grab that id and render your form something like this:

def action
  @user = User.relationships.build(:followed_id => params[:id])
  render :viewname, :layout => false
end

然后你可以在部分或者其他任何地方为@user构建一个表单

Then you can just build a form for @user in a partial or whatever

<%= form_for @user do |f| %>

你必须在那里填写详细信息，但这应该会让你非常接近。

You'll have to fill in the details there, but that should get you pretty close.

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