隐藏 Rails 模型属性 [英] Hiding Rails Model Attributes

问题描述

我有一个 API 控制器，如下所示:

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

如您所见，我经常重复我自己.我很想通过模型使这些(并且只有这些)属性可用，但找不到合适的解决方案.有什么东西可以保护属性不被大量写入吗?或者我的意思可能是大量阅读?

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?

如下面的评论所述，我想要一个带有属性的模型，name 和 i_am_private.当我将该模型渲染为 json - render :json =>@model - 我只想显示 name.

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导轨 3

Ruby 1.8.7 Rails 3

推荐答案

如何在你的 Group 模型中重写 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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