模块：Mongoid::Extensions

定义于：

lib/mongoid/extensions/设立.rb、
lib/mongoid/extensions/date.rb、
lib/mongoid/extensions/hash.rb、
lib/mongoid/extensions/time.rb、
lib/mongoid/extensions/数组.rb、
lib/mongoid/extensions/float.rb、
lib/mongoid/extensions/范围.rb、
lib/mongoid/extensions/binary.rb、
lib/mongoid/extensions/module.rb、
lib/mongoid/extensions/对象.rb、
lib/mongoid/extensions/regexp.rb、
lib/mongoid/extensions/string.rb、
lib/mongoid/extensions/symbol.rb、
lib/mongoid/extensions/integer.rb、
lib/mongoid/extensions/date_time.rb、
lib/mongoid/extensions/nil_class.rb、
lib/mongoid/extensions/object_id.rb、
lib/mongoid/extensions/decimal128.rb、
lib/mongoid/extensions/true_class.rb、
lib/mongoid/extensions/big_decimal .rb、
lib/mongoid/extensions/false_class.rb、
lib/mongoid/extensions/bson_document.rb、
lib/mongoid/extensions/time_with_zone.rb

在命名空间下定义

模块： 数组、BigDecimal、Binary、BsonDocument、Date、DateTime、Decimal128、FalseClass、Float、Hash、Integer、Module、NilClass、对象、ObjectId、范围、Regexp、Set、String、Symbol、Time、TimeWithZone、TrueClass