Module: Lexster::Relationship::InstanceMethods

Defined in:
lib/lexster/relationship.rb

Instance Method Summary collapse

Instance Method Details

#_neo_save ⇒ Object 



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# File 'lib/lexster/relationship.rb', line 35

def _neo_save
  return unless Lexster.enabled?
  
  options = self.class.lexster_config.relationship_options
  
  start_item = self.send(options[:start_node])
  end_item = self.send(options[:end_node])
  
  return unless start_item && end_item

  # initialize nodes
  start_item.neo_node
  end_item.neo_node

  data = self.to_neo.merge(ar_type: self.class.name, ar_id: self.id, Lexster::UNIQUE_ID_KEY => self.neo_unique_id)
  data.reject! { |k, v| v.nil? }

  rel_type = options[:type].is_a?(Proc) ? options[:type].call(self) : options[:type]

  gremlin_query = <<-GREMLIN
    idx = g.idx('relationship_auto_index');
    q = null;
    if (idx) q = idx.get(unique_id_key, unique_id);

    relationship = null;
    if (q && q.hasNext()) {
      relationship = q.next();
      relationship_data.each {
        if (relationship.getProperty(it.key) != it.value) {
          relationship.setProperty(it.key, it.value);
        }
      }
    } else {
      node_index = g.idx('node_auto_index');
      start_node = node_index.get(unique_id_key, start_node_unique_id).next();
      end_node = node_index.get(unique_id_key, end_node_unique_id).next();

      relationship = g.addEdge(start_node, end_node, rel_type, relationship_data);
    }

    relationship
  GREMLIN

   script_vars = {
    unique_id_key: Lexster::UNIQUE_ID_KEY,
    relationship_data: data,
    unique_id: self.neo_unique_id,
    start_node_unique_id: start_item.neo_unique_id,
    end_node_unique_id: end_item.neo_unique_id,
    rel_type: rel_type
  }

  Lexster::logger.info "Relationship#neo_save #{self.class.name} #{self.id}"
  
  relationship = Lexster.execute_script_or_add_to_batch gremlin_query, script_vars do |value|
    Lexster::Relationship.from_hash(value)
  end

  relationship
end

#neo_find_by_id ⇒ Object 



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# File 'lib/lexster/relationship.rb', line 29

def neo_find_by_id
  results = Lexster.db.get_relationship_auto_index(Lexster::UNIQUE_ID_KEY, self.neo_unique_id)
  relationship = results.present? ? Lexster::Relationship.from_hash(results[0]) : nil
  relationship
end

#neo_load(hash) ⇒ Object 



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# File 'lib/lexster/relationship.rb', line 96

def neo_load(hash)
  Lexster::Relationship.from_hash(hash)
end

#neo_relationship ⇒ Object 



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# File 'lib/lexster/relationship.rb', line 100

def neo_relationship
  _neo_representation
end