Class: NestedAttributesUniquenessValidator

Inherits:
ActiveModel::EachValidator
  • Object
show all
Includes:
NestedAttributesValidatorUtil
Defined in:
lib/nested_attributes_validator/active_model/validations/nested_attributes_uniqueness_validator.rb

Instance Method Summary collapse

Methods included from NestedAttributesValidatorUtil

#target_fields, #target_values

Instance Method Details

#validate_each(record, _attribute, values) ⇒ Object 



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# File 'lib/nested_attributes_validator/active_model/validations/nested_attributes_uniqueness_validator.rb', line 4

def validate_each(record, _attribute, values)
  trg_fields = target_fields

  # detect duplicated values
  duplicated_values = target_values(trg_fields, values)
                        .group_by{|_k ,v| v}.values
                        .select{|a| a.size>1}
                        .flatten(1)
                        .to_h
                        .keys

  # set errors
  duplicated_values.each do |value|
    trg_fields.each do |field|
      # set error to the parent record
      attribute_name = :"#{attributes.first}.#{options[:display_field] || field}"
      record.errors[attribute_name] << I18n.t('errors.messages.nested_attributes_not_unique')
      record.errors[attribute_name].uniq!

      # also set error to the child record to apply "field_with_errors"
      value.errors.add(field , nil)
    end
  end
end