Module: TinyDyno::HashKey

Extended by:
ActiveSupport::Concern
Included in:
DocumentComposition
Defined in:
lib/tiny_dyno/hash_key.rb

Defined Under Namespace

Modules: ClassMethods

Instance Method Summary collapse

Instance Method Details

#keys_as_selector ⇒ Object

return all defined hash keys on an instantiated object for further use in DynamoDB queries, i.e. to look up an object



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# File 'lib/tiny_dyno/hash_key.rb', line 18

def keys_as_selector
  selector = {}
  primary_key_field = self.class.primary_key[:attribute_name]
  selector[primary_key_field.to_sym] = TinyDyno::Adapter.aws_attribute(field_type: fields[primary_key_field].options[:type], value: attributes[primary_key_field])
  unless range_key.empty?
    range_key_field = self.class.range_key[:attribute_name]
    selector[range_key_field.to_sym] = TinyDyno::Adapter.aws_attribute(field_type: fields[range_key_field].options[:type], value: attributes[range_key_field])
  end
  return nil if selector.empty?
  selector
end