Method: GraphQL::Schema::Argument#validate_default_value

Defined in:
lib/graphql/schema/argument.rb

#validate_default_value ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/graphql/schema/argument.rb', line 376

def validate_default_value
  return unless default_value?
  coerced_default_value = begin
    # This is weird, but we should accept single-item default values for list-type arguments.
    # If we used `coerce_isolated_input` below, it would do this for us, but it's not really
    # the right thing here because we expect default values in application format (Ruby values)
    # not GraphQL format (scalar values).
    #
    # But I don't think Schema::List#coerce_result should apply wrapping to single-item lists.
    prepped_default_value = if default_value.nil?
      nil
    elsif (type.kind.list? || (type.kind.non_null? && type.of_type.list?)) && !default_value.respond_to?(:map)
      [default_value]
    else
      default_value
    end

    type.coerce_isolated_result(prepped_default_value) unless prepped_default_value.nil?
  rescue GraphQL::Schema::Enum::UnresolvedValueError
    # It raises this, which is helpful at runtime, but not here...
    default_value
  end
  res = type.valid_isolated_input?(coerced_default_value)
  if !res
    raise InvalidDefaultValueError.new(self)
  end
end