Rails - 将cookie存储在控制器中并从Javascript，Jquery获取

Question

是否可以在Controller中存储用户的Cookie或会话，并通过从JS或Jquery访问cookie来获取cookie？

Answer 1

Session values are available on the server.

You can set them like this in your controller :

session[:user_name] = @user.name

If you want to access that value later in javascript, you'll probably want to do something like this in a view:

<%= javascript_tag do %>
  var userName = '<%= session[:user_name %>';
<% end %>

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Cookies are managed by the browser, so accessed differently.

To set one in your controller:

cookies[:user_name] = @user.name

(You can also specify the path, expiration, etc. for the cookie using options .)

It can then be accessed using jQuery:

var userName = jQuery.cookie("user_name");

Note: you can also access the cookie using pure javascript (not jQuery) by parsing document.cookie , but it is much easier to let jQuery do it for you (if you're already using that library).