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Contents
module Neo4j
class Label
class << self
def indexes
schema_query(:get_indexes)
end
def constraints
schema_query(:get_constraints)
end
def index?(label, property)
schema_index_operation(label, property, :indexes)
end
def constraint?(label, property)
schema_index_operation(label, property, :constraints)
end
def drop_all_indexes
Neo4j::Transaction.run do
schema.get_indexes.to_a.each do |i|
begin
i.drop
rescue Java::JavaLang::IllegalStateException; end
end
end
end
def drop_all_constraints
Neo4j::Transaction.run do
schema.get_constraints.to_a.each(&:drop)
end
end
private
def schema_query(query_method)
[].tap do |index_array|
Neo4j::Transaction.run do
schema.send(query_method).to_a.each { |i| index_array << index_hash(i) }
end
end
end
def schema_index_operation(label, property, schema_method)
label = label.to_s
property = property.to_s
!send(schema_method).select { |i| matched_index(i, label, property) }.empty?
end
def index_hash(java_index)
{property_keys: java_index.get_property_keys.to_a, label: java_index.get_label.name}
end
def matched_index(java_index, label, property)
java_index[:property_keys].first == property && java_index[:label] == label
end
def schema
Neo4j::Session.current.graph_db.schema
end
end
end
end
Version data entries
30 entries across 30 versions & 1 rubygems