transactions: Transactions

In RNeo4j: Neo4j Driver for R

Description

Transactions

Usage

appendCypher(transaction, query, ...)

commit(transaction)

newTransaction(graph)

Arguments

transaction	A transaction object.
query	A character string.
...	A named list. Optional parameters to pass to the query in the form key = value, if applicable.
graph	A graph object.

Value

newTransaction returns a transaction object. Both appendCypher and commit return NULL.

Examples

## Not run: 
graph = startGraph("http://localhost:7474/db/data/")
clear(graph)

data = data.frame(Origin = c("SFO", "AUS", "MCI"),
                  FlightNum = c(1, 2, 3),
                 Destination = c("PDX", "MCI", "LGA"))


query = "
MERGE (origin:Airport {name:{origin_name}})
MERGE (destination:Airport {name:{dest_name}})
CREATE (origin)<-[:ORIGIN]-(:Flight {number:{flight_num}})-[:DESTINATION]->(destination)
"

t = newTransaction(graph)

for (i in 1:nrow(data)) {
  origin_name = data[i, ]$Origin
  dest_name = data[i, ]$Dest
  flight_num = data[i, ]$FlightNum

  appendCypher(t,
               query,
               origin_name = origin_name,
               dest_name = dest_name,
               flight_num = flight_num)
}

commit(t)

cypher(graph, "MATCH (o:Airport)<-[:ORIGIN]-(f:Flight)-[:DESTINATION]->(d:Airport)
       RETURN o.name, f.number, d.name")

## End(Not run)

RNeo4j documentation built on May 29, 2017, 4:01 p.m.