Add source code

Author: dchentech

README.markdown

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+mongoid_sync_with_deserialization
+=================================
+解决JSON同步数据时，不支持Time等类型序列化的问题。
+
+
+TODO
+---------------------------------
+需要修改fields，才能ActiveModel公用
+
+参考
+---------------------------------
+Store Data type in JSON, MongoDB has a solution. http://markembling.info/2011/07/json-date-time
+
+```text
+MongoDB shell version: 1.8.2
+connecting to: test
+> db.tests.insert({'ts':new Date()})
+> db.tests.find()
+{ "_id" : ObjectId("4e1f671d671bd7812369551e"), "ts" : ISODate("2011-07-14T22:01:01.947Z") }
+```

README.md

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+# encoding: UTF-8
+
+require 'rails'
+require 'mongoid'
+
+module ::Mongoid
+  module SyncWithDeserialization
+    extend ActiveSupport::Concern
+
+    included do
+      cattr_accessor :deserialization_parsers
+      before_save :deserialization_before_sync
+
+      def deserialization_before_sync
+        Utils.load_parsers self.class
+
+        self.class.deserialization_parsers.each do |_field, _field_parser|
+          _v = self.read_attribute(_field)
+          if _v.is_a?(String)
+            _v = _field_parser.call(_v) rescue _v
+            self.write_attribute(_field, _v)
+          end
+          Rails.logger.info "#{_field} : #{_field_parser} : #{_v}" if $IS_DEBUG_SyncWithDeserialization
+        end
+      end
+    end
+
+
+    module Utils
+      def self.load_parsers klass
+        return false if not klass.deserialization_parsers.blank?
+        klass.deserialization_parsers ||= {}
+
+        klass.fields.each do |_field_k, _field_v|
+          # Add more data parsers
+          if [Time, DateTime].include? _field_v.type
+            klass.deserialization_parsers[_field_k] = proc {|v| Time.zone.parse(v) }
+          end
+        end
+
+      end
+    end
+
+  end
+end

lib/mongoid_sync_with_deserialization.rb

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+Gem::Specification.new do |s|
+  s.name        = 'mongoid_sync_with_deserialization'
+  s.version     = '0.0.1'
+  s.date        = '2013-12-05'
+  s.summary     = File.read("README.markdown").split(/===+/)[1].strip.split("\n")[0]
+  s.description = s.summary
+  s.authors     = ["David Chen"]
+  s.email       = '[email protected]'
+  s.homepage    = 'https://github.com/SunshineLibrary/mongoid_sync_with_deserialization/'
+  s.license     = 'MIT'
+
+  s.add_dependency "mongoid"
+  s.add_dependency "activesupport", "> 3.2"
+
+  s.files = `git ls-files`.split("\n")
+end