Class: VehicleModelValidator

Inherits:
ActiveModel::EachValidator
  • Object
show all
Defined in:
lib/vehicles/validators/vehicle_model_validator.rb

Overview

Drop-in validator: validates :model, vehicle_model: { make: :make }.

Checks that the value is a real model OF the make held in another attribute. Pass make: pointing at the attribute that holds the make (defaults to :make).

validates :model, vehicle_model: { make: :car_make }

Defensive by design: blank model passes; an unknown/blank make can't disprove the model, so it passes (let the make's own validator flag that); errors never raise out of a form submission.

Pass allow_other: true to accept the "Other / not in the list" escape hatch (see Vehicles.other?) — pair it with Vehicles.model_options(include_other:).

Instance Method Summary collapse

Instance Method Details

#validate_each(record, attribute, value) ⇒ Object 



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# File 'lib/vehicles/validators/vehicle_model_validator.rb', line 17

def validate_each(record, attribute, value)
  return if value.blank?
  return if options[:allow_other] && Vehicles.other?(value)

  make_attribute = options[:make] || :make
  make_value = record.respond_to?(make_attribute) ? record.public_send(make_attribute) : nil
  make = Vehicles.make(make_value)
  return if make.nil? # unknown make -> defer to the make validator
  return if make.model(value)

  record.errors.add(attribute, options[:message] || "is not a recognized #{make.name} model")
rescue StandardError => e
  Vehicles.logger&.error("[vehicles] vehicle_model validation error: #{e.message}")
  record.errors.add(attribute, options[:message] || "is not a recognized vehicle model")
end