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Contents
module Neo4j
module Rule
module Functions
class Sum < Function
# Updates the function's value.
# Called after the transactions commits and a property has been changed on a node.
#
# ==== Arguments
# * rule_name :: the name of the rule group
# * rule_node :: the node which contains the value of this function
# * old_value new value :: the changed value of the property (when the transaction commits)
def update(rule_name, rule_node, old_value, new_value)
key = rule_node_property(rule_name)
rule_node[key] ||= 0
old_value ||= 0
new_value ||= 0
rule_node[key] += new_value - old_value
end
def self.function_name
:sum
end
end
end
end
end
Version data entries
26 entries across 26 versions & 1 rubygems