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.
RelatedNode/InvalidParameterError
- #==
Loads the node if needed, then conducts comparison.
ruby
- def ==(other)
loaded if @node.is_a?(Integer) @node == other
end
ruby
- def class
loaded.send(:class)
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.
Initialization with a node doesn't appear to happen in the code. TODO: maybe find out why this is an option.
ruby
- def initialize(node = nil)
@node = valid_node_param?(node) ? node : (fail 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
ruby
- def loaded
@node = @node.respond_to?(:neo_id) ? @node : Neo4j::Node.load(@node)
end
ruby
- def loaded?
@node.respond_to?(:neo_id)
end
ruby
def method_missing(args, &block) loaded.send(args, &block) end
- #neo_id
Returns the neo_id of a given node without loading.
ruby
- def neo_id
loaded? ? @node.neo_id : @node
end
ruby
- def respond_to_missing?(method_name, include_private = false)
loaded if @node.is_a?(Integer) @node.respond_to?(method_name) ? true : super
end