RelatedNode¶
A container for ActiveRel’s :inbound and :outbound methods. It provides lazy loading of nodes. It’s important (or maybe not really IMPORTANT, but at least worth mentioning) that calling method_missing will result in a query to load the node if the node is not already loaded.
Constants¶
Methods¶
- #==
Loads the node if needed, then conducts comparison.
def ==(other) loaded if @node.is_a?(Integer) @node == other end
#class
def class loaded.send(:class) end
#cypher_representation
def cypher_representation(clazz) case when !set? "(#{formatted_label_list(clazz)})" when set? && !loaded? "(Node with neo_id #{@node})" else node_class = self.class id_name = node_class.id_property_name labels = ':' + node_class.mapped_label_names.join(':') "(#{labels} {#{id_name}: #{@node.id.inspect}})" end end
- #initialize
ActiveRel’s related nodes can be initialized with nothing, an integer, or a fully wrapped node.
Initialization with nothing happens when a new, non-persisted ActiveRel object is first initialized.
Initialization with an integer happens when a relationship is loaded from the database. It loads using the ID because that is provided by the Cypher response and does not require an extra query.
def initialize(node = nil) @node = valid_node_param?(node) ? node : (fail Neo4j::InvalidParameterError, 'RelatedNode must be initialized with either a node ID or node') end
- #loaded
Loads a node from the database or returns the node if already laoded
def loaded fail UnsetRelatedNodeError, 'Node not set, cannot load' if @node.nil? @node = @node.respond_to?(:neo_id) ? @node : Neo4j::Node.load(@node) end
#loaded?
def loaded? @node.respond_to?(:neo_id) end
#method_missing
def method_missing(*args, &block) loaded.send(*args, &block) end
- #neo_id
Returns the neo_id of a given node without loading.
def neo_id loaded? ? @node.neo_id : @node end
#respond_to_missing?
def respond_to_missing?(method_name, include_private = false) loaded if @node.is_a?(Numeric) @node.respond_to?(method_name) ? true : super end
#set?
def set? !@node.nil? end