Persistence¶
Constants¶
Methods¶
#apply_default_values
def apply_default_values return if self.class.declared_property_defaults.empty? self.class.declared_property_defaults.each_pair do |key, value| self.send("#{key}=", value) if self.send(key).nil? end end
#cache_key
def cache_key if self.new_record? "#{model_cache_key}/new" elsif self.respond_to?(:updated_at) && !self.updated_at.blank? "#{model_cache_key}/#{neo_id}-#{self.updated_at.utc.to_s(:number)}" else "#{model_cache_key}/#{neo_id}" end end
- #concurrent_increment!
Increments concurrently a numeric attribute by a centain amount
def concurrent_increment!(attribute, by = 1) query_rel = Neo4j::Session.query.match('()-[n]-()').where(n: {neo_id: neo_id}) increment_by_query! query_rel, attribute, by end
#create_method
def create_method self.class.create_method end
#create_model
def create_model validate_node_classes! rel = _create_rel return self unless rel.respond_to?(:props) init_on_load(rel, from_node, to_node, @rel_type) true end
#create_or_update
def create_or_update # since the same model can be created or updated twice from a relationship we have to have this guard @_create_or_updating = true apply_default_values result = _persisted_obj ? update_model : create_model if result == false Neo4j::Transaction.current.failure if Neo4j::Transaction.current false else true end rescue => e Neo4j::Transaction.current.failure if Neo4j::Transaction.current raise e ensure @_create_or_updating = nil end
#cypher_identifier
def cypher_identifier @cypher_identifier || :rel end
#destroy
def destroy freeze _persisted_obj && _persisted_obj.del @_deleted = true end
- #destroyed?
Returns +true+ if the object was destroyed.
def destroyed? @_deleted end
#exist?
def exist? _persisted_obj && _persisted_obj.exist? end
#freeze
def freeze @attributes.freeze self end
#from_node_identifier
def from_node_identifier @from_node_identifier || :from_node end
#from_node_identifier=
def from_node_identifier=(id) @from_node_identifier = id.to_sym end
#frozen?
def frozen? @attributes.frozen? end
- #increment
Increments a numeric attribute by a centain amount
def increment(attribute, by = 1) self[attribute] ||= 0 self[attribute] += by self end
- #increment!
Convenience method to increment numeric attribute and #save at the same time
def increment!(attribute, by = 1) increment(attribute, by).update_attribute(attribute, self[attribute]) end
- #new?
Returns +true+ if the record hasn’t been saved to Neo4j yet.
def new_record? !_persisted_obj end
- #new_record?
Returns +true+ if the record hasn’t been saved to Neo4j yet.
def new_record? !_persisted_obj end
- #persisted?
Returns +true+ if the record is persisted, i.e. it’s not a new record and it was not destroyed
def persisted? !new_record? && !destroyed? end
#props
def props attributes.reject { |_, v| v.nil? }.symbolize_keys end
- #props_for_create
Returns a hash containing: * All properties and values for insertion in the database * A uuid (or equivalent) key and value * Timestamps, if the class is set to include them. Note that the UUID is added to the hash but is not set on the node. The timestamps, by comparison, are set on the node prior to addition in this hash.
def props_for_create inject_timestamps! props_with_defaults = inject_defaults!(props) converted_props = props_for_db(props_with_defaults) return converted_props unless self.class.respond_to?(:default_property_values) inject_primary_key!(converted_props) end
#props_for_persistence
def props_for_persistence _persisted_obj ? props_for_update : props_for_create end
#props_for_update
def props_for_update update_magic_properties changed_props = attributes.select { |k, _| changed_attributes.include?(k) } changed_props.symbolize_keys! inject_defaults!(changed_props) props_for_db(changed_props) end
#reload
def reload return self if new_record? association_proxy_cache.clear if respond_to?(:association_proxy_cache) changed_attributes && changed_attributes.clear unless reload_from_database @_deleted = true freeze end self end
#reload_from_database
def reload_from_database reloaded = self.class.load_entity(neo_id) reloaded ? init_on_reload(reloaded._persisted_obj) : nil end
#save
def save(*) create_or_update end
#save!
def save!(*args) save(*args) or fail(RelInvalidError, inspect) # rubocop:disable Style/AndOr end
#to_node_identifier
def to_node_identifier @to_node_identifier || :to_node end
#to_node_identifier=
def to_node_identifier=(id) @to_node_identifier = id.to_sym end
#touch
def touch fail 'Cannot touch on a new record object' unless persisted? update_attribute!(:updated_at, Time.now) if respond_to?(:updated_at=) end
- #update
Updates this resource with all the attributes from the passed-in Hash and requests that the record be saved. If saving fails because the resource is invalid then false will be returned.
def update(attributes) self.attributes = process_attributes(attributes) save end
- #update!
Same as {#update_attributes}, but raises an exception if saving fails.
def update!(attributes) self.attributes = process_attributes(attributes) save! end
- #update_attribute
Convenience method to set attribute and #save at the same time
def update_attribute(attribute, value) send("#{attribute}=", value) self.save end
- #update_attribute!
Convenience method to set attribute and #save! at the same time
def update_attribute!(attribute, value) send("#{attribute}=", value) self.save! end
- #update_attributes
Updates this resource with all the attributes from the passed-in Hash and requests that the record be saved. If saving fails because the resource is invalid then false will be returned.
def update(attributes) self.attributes = process_attributes(attributes) save end
- #update_attributes!
Same as {#update_attributes}, but raises an exception if saving fails.
def update!(attributes) self.attributes = process_attributes(attributes) save! end
#update_model
def update_model return if !changed_attributes || changed_attributes.empty? _persisted_obj.update_props(props_for_update) changed_attributes.clear end