QueryProxyMethodsOfMassUpdating¶
Constants¶
Methods¶
- #delete
Deletes the relationship between a node and its last link in the QueryProxy chain. Executed in the database, callbacks will not run.
def delete(node) self.match_to(node).query.delete(rel_var).exec clear_source_object_cache end
- #delete_all
Deletes a group of nodes and relationships within a QP chain. When identifier is omitted, it will remove the last link in the chain. The optional argument must be a node identifier. A relationship identifier will result in a Cypher Error
def delete_all(identifier = nil) query_with_target(identifier) do |target| begin self.query.with(target).optional_match("(#{target})-[#{target}_rel]-()").delete("#{target}, #{target}_rel").exec rescue Neo4j::Session::CypherError self.query.delete(target).exec end clear_source_object_cache end end
- #delete_all_rels
Deletes the relationships between all nodes for the last step in the QueryProxy chain. Executed in the database, callbacks will not be run.
def delete_all_rels return unless start_object && start_object._persisted_obj self.query.delete(rel_var).exec end
- #destroy
Returns all relationships between a node and its last link in the QueryProxy chain, destroys them in Ruby. Callbacks will be run.
def destroy(node) self.rels_to(node).map!(&:destroy) clear_source_object_cache end
- #replace_with
Deletes the relationships between all nodes for the last step in the QueryProxy chain and replaces them with relationships to the given nodes. Executed in the database, callbacks will not be run.
def replace_with(node_or_nodes) nodes = Array(node_or_nodes) self.delete_all_rels nodes.each { |node| self << node } end
- #update_all
Updates some attributes of a group of nodes within a QP chain. The optional argument makes sense only of updates is a string.
def update_all(updates, params = {}) # Move this to ActiveNode module? update_all_with_query(identity, updates, params) end
- #update_all_rels
Updates some attributes of a group of relationships within a QP chain. The optional argument makes sense only of updates is a string.
def update_all_rels(updates, params = {}) fail 'Cannot update rels without a relationship variable.' unless @rel_var update_all_with_query(@rel_var, updates, params) end