lib/grape/validations/validators/exactly_one_of_validator.rb
# frozen_string_literal: true
module Grape
module Validations
module Validators
class ExactlyOneOfValidator < MultipleParamsBase
def validate_params!(params)
keys = keys_in_common(params)
return if keys.length == 1
raise Grape::Exceptions::Validation.new(params: all_keys, message: message(:exactly_one)) if keys.length.zero?
raise Grape::Exceptions::Validation.new(params: keys, message: message(:mutual_exclusion))
end
end
end
end
end