class Grape::Validations::AllowBlankValidator

Public Instance Methods

validate_param!(attr_name, params) click to toggle source
# File lib/grape/validations/validators/allow_blank.rb, line 4
def validate_param!(attr_name, params)
  return if (options_key?(:value) ? @option[:value] : @option) || !params.is_a?(Hash)

  value = params[attr_name]
  value = value.strip if value.respond_to?(:strip)

  key_exists = params.key?(attr_name)

  if @scope.root?
    # root scope. validate if it's a required param. if it's optional, validate only if key exists in hash
    should_validate = @required || key_exists
  else # nested scope
    should_validate = # required param, and scope contains some values (if scoping element contains no values, treat as blank)
      (@required && params.present?) ||
      # optional param but key inside scoping element exists
      (!@required && params.key?(attr_name))
  end

  return unless should_validate

  return if value == false || value.present?

  fail Grape::Exceptions::Validation, params: [@scope.full_name(attr_name)], message: message(:blank)
end