Question

鉴于此mongoid“报告”文档对象embeds_one位置对象：

{
  comment: "",
  location: {
    address: "391 Little Bourke St, Melbourne VIC 3000, Australia",
    geocode: {
      ll: "-37.813787,144.961227",
    }
  },
  _id: "4d84af7f52f3d40539000021",
}

我如何除了位置哈希的地理编码部分？

例如，通过在报告模型中执行此操作，除了注释字段之外很容易：

def to_json(options={})
  options[:except] ||= :comment
  super(options)
end

代码的外观是什么，除了“geocode”，它是位置的一部分？

Answer 1

适合我：


require 'rubygems'
require 'mongoid'

Mongoid::Config.settings = {
  "host" => "127.0.0.1",
  "database" => "testing"
}

class Report
  include Mongoid::Document
  embeds_one :location

  field :comment
end

class Location
  include Mongoid::Document
  field :address
  field :geocode, :type => Hash

  embedded_in :report
end

report = Report.new(:comment=>'comment', :location => {:address=>'elm street', :geocode => {:ll=>'-31'}})
puts report.to_json(:include=>:location, :except => :geocode)

收率： {“_ id”：“4dab2655b4e4cf2fa6000001”，“comment”：“comment”，“location”：{“_ id”：“4dab2655b4e4cf2fa6000002”，“address”：“elm street”}}

如果您希望Location始终省略地理编码，那么您应该在Location类中重新定义serializable_hash：


  def serializable_hash(options = nil)
    options ||= {}
    options[:except] = :geocode
    super(options).tap do |attrs|
      serialize_relations(attrs, options) if options[:include]
    end
  end

除了Mongoid中的embeds_one对象之外的JSON序列化？

1 个答案: