Module: Neo4j::Rails::RelationshipPersistence

Extended by:
TxMethods
Included in:
Relationship
Defined in:
lib/neo4j/rails/relationship_persistence.rb

Instance Method Summary (collapse)

Methods included from TxMethods

tx_methods

Instance Method Details

- (Object) create 



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# File 'lib/neo4j/rails/relationship_persistence.rb', line 20

def create
  # prevent calling create twice
  @_start_node.add_unpersisted_outgoing_rel(rel_type, self)
  @_end_node.add_unpersisted_incoming_rel(rel_type, self)

  return unless _persist_node(@_start_node) && _persist_node(@_end_node)

  java_rel = Neo4j::Relationship.new(rel_type, start_node, end_node)
  init_on_load(java_rel)
  Neo4j::IdentityMap.add(java_rel, self)
  init_on_create

  @_start_node.rm_unpersisted_outgoing_rel(rel_type, self)
  @_end_node.rm_unpersisted_incoming_rel(rel_type, self)
  true
end

- (Object) end_node

Returns the end node which can be unpersisted

See Also:



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# File 'lib/neo4j/rails/relationship_persistence.rb', line 60

def end_node
  @_end_node ||= _java_rel && _java_rel.end_node.wrapper
end

- (Object) freeze_if_deleted 



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# File 'lib/neo4j/rails/relationship_persistence.rb', line 76

def freeze_if_deleted
  unless new_record?
    Neo4j::IdentityMap.remove_rel_by_id(neo_id)
    unless self.class.load_entity(neo_id)
      set_deleted_properties
      freeze
    end
  end
end

- (Object) initialize(*args)

Initialize a Node with a set of properties (or empty if nothing is passed)



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# File 'lib/neo4j/rails/relationship_persistence.rb', line 7

def initialize(*args)
  return initialize_attributes(nil) if args.size < 3 # then we have been loaded
  type, start_node, end_node, attributes = args
  @_rel_type = type.to_sym
  raise "Unknown type" unless type
  raise "Unknown start_node" unless start_node
  raise "Unknown end_node" unless end_node
  self.start_node = start_node
  self.end_node = end_node
  initialize_attributes(attributes)
end

- (Object) other_node(node)

See Also:



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# File 'lib/neo4j/rails/relationship_persistence.rb', line 43

def other_node(node)
  n = if persisted?
        _java_rel._other_node(node._java_entity)
      else
        @_start_node == node ? @_end_node : @_start_node
      end
  n && n.wrapper
end

- (Symbol) rel_type

The relationship type

Returns:

  • (Symbol) —

    the relationship type



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# File 'lib/neo4j/rails/relationship_persistence.rb', line 38

def rel_type
  new_record? ? @_rel_type : _java_entity.rel_type.to_sym
end

- (Object) reload(options = nil)

Reload the object from the DB



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# File 'lib/neo4j/rails/relationship_persistence.rb', line 65

def reload(options = nil)
  raise "Can't reload a none persisted node" if new_record?
  clear_changes
  reset_attributes
  unless reload_from_database
    set_deleted_properties
    freeze
  end
  self
end

- (Object) reload_from_database 



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# File 'lib/neo4j/rails/relationship_persistence.rb', line 86

def reload_from_database
  Neo4j::IdentityMap.remove_rel_by_id(id) if persisted?
  if reloaded = self.class.load_entity(id)
    send(:attributes=, reloaded.attributes, false)
  end
  reloaded
end

- (Object) start_node

Returns the start node which can be unpersisted

See Also:



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# File 'lib/neo4j/rails/relationship_persistence.rb', line 54

def start_node
  @_start_node ||= _java_rel && _java_rel.start_node.wrapper
end