module Neo4j::ActiveNode::Query::ClassMethods
Public Instance Methods
Start a new QueryProxy
with the starting identifier set to the given argument. This method does not exist within QueryProxy
, it can only be called at the class level to create a new QP object. To set an identifier within a QueryProxy
chain, give it as the first argument to a chained association.
@example Start a new QueryProxy
where the first identifier is set manually.
# Generates: MATCH (s:`Student`), (result_lessons:`Lesson`), s-[rel1:`ENROLLED_IN`]->(result_lessons:`Lesson`) Student.as(:s).lessons
@param [String, Symbol] node_var A string or symbol to use as the starting identifier. @return [Neo4j::ActiveNode::Query::QueryProxy]
# File lib/neo4j/active_node/query.rb 70 def as(node_var) 71 query_proxy(node: node_var, context: self.name) 72 end
Returns a Query
object with all nodes for the model matched as the specified variable name
@example Return the registration number of all cars owned by a person over the age of 30
# Generates: MATCH (person:Person), person-[:owned]-car WHERE person.age > 30 RETURN car.registration_number Person.query_as(:person).where('person.age > 30').match('person-[:owned]-car').return(car: :registration_number)
@param [Symbol, String] var The variable name to specify in the query @param [Boolean] with_labels Should labels be used to build the match? There are situations (neo_id used to filter, an early Cypher match has already filtered results) where including labels will degrade performance. @return [Neo4j::Core::Query]
# File lib/neo4j/active_node/query.rb 46 def query_as(var, with_labels = true) 47 query_proxy.query_as(var, with_labels) 48 end
# File lib/neo4j/active_node/query.rb 56 def query_proxy(options = {}) 57 Neo4j::ActiveNode::Query::QueryProxy.new(self, nil, options) 58 end