Required Files
- active_support/core_ext/array/conversions
- active_support/core_ext/string/inflections
- active_support/core_ext/object/deep_dup
- active_support/core_ext/string/filters
Namespace
- MODULE ActiveModel
- CLASS ActiveModel::Errors
- CLASS ActiveModel::RangeError
- CLASS ActiveModel::StrictValidationFailed
- CLASS ActiveModel::UnknownAttributeError