>> Tag.ancestors
=> [Tag, ActiveRecord::Base, ActiveRecord::Usesguid, FileColumn::Validations, FileColumn, Authorization::ObjectRolesTable::UserExtensions, Authorization::ObjectRolesTable::ModelExtensions, ActiveRecord::Acts::Taggable, FerretMixin::Acts::ARFerret, ActiveRecord::Acts::Dropdown, ActiveRecord::Calculations, ActiveRecord::Acts::NestedSet, ActiveRecord::Acts::List, ActiveRecord::Acts::Tree, ActiveRecord::Reflection, ActiveRecord::Transactions, ActiveRecord::Aggregations, ActiveRecord::Associations, ActiveRecord::Timestamp, ActiveRecord::Observing, ActiveRecord::Callbacks, ActiveRecord::Locking, ActiveRecord::Validations, Reloadable, Reloadable::Subclasses, Object, Base64::Deprecated, Base64, Kernel]
>> Tag.methods - ActiveRecord::Base.methods
=> ["parse", "original_table_name", "original_primary_key"]