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Contents
module Neo4j
module Wrapper
module RelationshipMixin
module ClassMethods
# Creates a relationship between given nodes.
#
# You can use two callback method to initialize the relationship
# init_on_load:: this method is called when the relationship is loaded from the database
# init_on_create:: called when the relationship is created, will be provided with the same argument as the new method
#
# @param [String, Symbol] type the type of the relationships
# @param [Neo4j::Node, Neo4j::NodeMixin] from_node create relationship from this node
# @param [Neo4j::Node, Neo4j::NodeMixin] to_node create relationship to this node
# @param [Hash] props optional hash of properties to initialize the create relationship with
# @see http://rdoc.info/github/andreasronge/neo4j-core/master/Neo4j/Relationship Neo4j::Relationship
def new(type, from_node, to_node, *props)
rel = Neo4j::Relationship.create(type, from_node, to_node)
wrapped_rel = super()
Neo4j::IdentityMap.add(rel, wrapped_rel)
wrapped_rel.init_on_load(rel)
wrapped_rel.init_on_create(type, from_node, to_node, *props)
wrapped_rel
end
alias_method :create, :new
# Loads a wrapped relationship from the database given a neo id.
# @param [#to_i, nil] neo_id
# @raise an exception if the loaded node/relationship is not of the same kind as this class.
# @return [Object, nil] If the node does not exist it will return nil otherwise the loaded relationship or wrapped relationship.
def load_entity(neo_id)
node = Neo4j::Relationship.load(neo_id)
return nil if node.nil?
return node if node.class == Neo4j::Relationship
raise "Expected loaded node #{neo_id} to be of type #{self} but it was #{node.class}" unless node.kind_of?(self)
node
end
end
end
end
end
Version data entries
21 entries across 21 versions & 1 rubygems