隐藏的Rails模型中的属性 [英] Hiding Rails Model Attributes

问题描述

我有一个看起来像这样的API中的控制器：

I have a controller for an API that looks like this:

def index
  respond_to   do |format|
    format.json  { render :json => @groups.to_json(:only => [:id, :name, :description, :created_at, :updated_at])}
  end
end

def show
  respond_to   do |format|
    format.json  { render :json => @group.to_json(:only => [:id, :name, :description, :created_at, :updated_at]) }
  end
end

# @todo add store to item
def create
  if @group.save
    render :json => @group.to_json(:only => [:id, :name, :description, :created_at, :updated_at])
  else
    render :status => 406
  end
end

def update
  if @group.update_attributes(params[:group])
    render :json => @group.to_json(:only => [:id, :name, :description, :created_at, :updated_at])
  else
    render :status => 406
  end
end

def destroy
  @group.destroy
  render :text => ""
end

正如你所看到的，我重复我自己很多。我很乐意做这些（而且只有这些）的属性可以通过模型的方式，也没有找到一个合适的解决方案。有什么来保护大众写作的属性？或者我可能意味着大众阅读？

As you can see, I'm repeating my self a lot. I'd love to make these (and only these) attributes available by way of the model, but couldn't find a fitting solution. Is there anything to protect attributes from mass writing? Or do I possibly mean mass reading?

正如评论指出下面我想和属性的模式，名称和 i_am_private 。当我渲染模型作为JSON - 渲染：JSON =＆GT; @model - 我只想名称现身

As noted in comments below I want to have a model with attributes, name and i_am_private. When I render that model as json - render :json => @model - I want only name to show up.

红宝石1.8.7
轨道3

Ruby 1.8.7 Rails 3

推荐答案

如何在组模式覆盖as_json方法？

How about overriding as_json method in your Group model?

class Group < ActiveRecord:Base
  ...
  def as_json(options={})
    {
      :id => id,
      :name => name,
      :description => description,
      :created_at => created_at,
      :updated_at => updated_at
    }
  end
end

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