无法访问attr_accessor定义的变量 [英] Cannot access attr_accessor defined variables

问题描述

我使用的思考斯芬克斯运行搜索，我也得到了相应的ActiveRecord模型罚款。问题是，我想创建的每个模型的一个适当的链接路径和文本，然后将信息以JSON形式的浏览器，通过AJAX。我现在用的是下面建立这些连接属性：

I am using Thinking Sphinx to run searches and I get the appropriate ActiveRecord Models fine. The problem is, I want to create an appropriate link path and text on each model, then send the info to the browser in the form of JSON, via AJAX. I am using the following to build those link attributes:

在控制器：

In the controller:

class FindController < ApplicationController
  def tag_results
    @results = ThinkingSphinx.search(params[:terms])
    @results.each do |result|
      result.build_ajax_response
    end
    respond_to do |format|
      format.html
      format.json { render :json => @results }
    end
  end
end

在该模型中：

In the model:

class TaggedItem < ActiveRecord::Base
  attr_accessible :name
  attr_accessor :search_link, :search_text

高清build_ajax_response     self.search_link = Rails.application.routes.url_helpers.tagged_item_path（self.id）     self.search_text = self.name   结束 结束

def build_ajax_response self.search_link = Rails.application.routes.url_helpers.tagged_item_path(self.id) self.search_text = self.name end end

由此产生的JSON对象不具有任何列出的搜索_ *属性，更谈不上对他们的价值。我已经使用@search_link以及刚刚search_link在 build_ajax_response 方法试过了。

The resulting json object doesn't have either of the search_* attributes listed, much less have a value for them. I've tried using @search_link as well as just search_link in the build_ajax_response method.

我这样做不对吗？难道还有别的东西干扰？

Am I doing this wrong? Could there be something else interfering?

推荐答案

Rails的默认 to_json 不知道这些额外的不活动记录属性您已经添加。最简单的可能的事情可能是指定它们作为额外的方法包括：

Rails' default to_json doesn't know about those extra not active record attributes you've added. The easiest possible thing is probably to specify them as extra methods to include:

format.json { render :json => @results.to_json(:methods => [:search_link, :search_text] }

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