Output of Device.ancestors (Ruby 2.1.2 / Rails 4.1.1)

gistfile1.txt

2.1.2 :001 > puts Device.ancestors
Device
#<Module:0x007f81dac8e390>
ActiveRecord::Base
ActiveRecord::Store
ActiveRecord::Serialization
ActiveModel::Serializers::Xml
ActiveModel::Serializers::JSON
ActiveModel::Serialization
ActiveRecord::Reflection
ActiveRecord::Transactions
ActiveRecord::Aggregations
ActiveRecord::NestedAttributes
ActiveRecord::AutosaveAssociation
ActiveModel::SecurePassword
ActiveRecord::Associations
ActiveRecord::Timestamp
ActiveModel::Validations::Callbacks
ActiveRecord::Callbacks
ActiveRecord::AttributeMethods::Serialization
ActiveRecord::AttributeMethods::Dirty
ActiveModel::Dirty
ActiveRecord::AttributeMethods::TimeZoneConversion
ActiveRecord::AttributeMethods::PrimaryKey
ActiveRecord::AttributeMethods::Query
ActiveRecord::AttributeMethods::BeforeTypeCast
ActiveRecord::AttributeMethods::Write
ActiveRecord::AttributeMethods::Read
#<Module:0x007f81d64b89a8>
ActiveRecord::AttributeMethods
ActiveModel::AttributeMethods
ActiveRecord::Locking::Pessimistic
ActiveRecord::Locking::Optimistic
ActiveRecord::CounterCache
ActiveRecord::Validations
ActiveModel::Validations::HelperMethods
ActiveSupport::Callbacks
ActiveModel::Validations
ActiveRecord::Integration
ActiveModel::Conversion
ActiveRecord::AttributeAssignment
ActiveModel::ForbiddenAttributesProtection
ActiveRecord::Sanitization
ActiveRecord::Scoping::Named
ActiveRecord::Scoping::Default
ActiveRecord::Scoping
ActiveRecord::Inheritance
ActiveRecord::ModelSchema
ActiveRecord::ReadonlyAttributes
ActiveRecord::NoTouching
ActiveRecord::Persistence
ActiveRecord::Core
Object
ActiveSupport::Dependencies::Loadable
PP::ObjectMixin
JSON::Ext::Generator::GeneratorMethods::Object
Kernel
BasicObject
 => nil
2.1.2 :002 >