redisgraph-go

redisgraph-go is a Golang client for the RedisGraph module. It relies on redigo for Redis connection management and provides support for RedisGraph's QUERY, EXPLAIN, and DELETE commands.

Installation

Simply do:

$ go get github.com/redislabs/redisgraph-go

Usage

The complete redisgraph-go API is documented on GoDoc.

package main

import (
    "fmt"
    "os"

    "github.com/gomodule/redigo/redis"
    rg "github.com/redislabs/redisgraph-go"
)

func main() {
    conn, _ := redis.Dial("tcp", "127.0.0.1:6379")
    defer conn.Close()

    graph := rg.GraphNew("social", conn)

    graph.Delete()

    john := rg.Node{
        Label: "person",
        Properties: map[string]interface{}{
            "name":   "John Doe",
            "age":    33,
            "gender": "male",
            "status": "single",
        },
    }
    graph.AddNode(&john)

    japan := rg.Node{
        Label: "country",
        Properties: map[string]interface{}{
            "name": "Japan",
        },
    }
    graph.AddNode(&japan)

    edge := rg.Edge{
        Source:      &john,
        Relation:    "visited",
        Destination: &japan,
    }
    graph.AddEdge(&edge)

    graph.Commit()

    query := `MATCH (p:person)-[v:visited]->(c:country)
           RETURN p.name, p.age, c.name`

    // result is a QueryResult struct containing the query's generated records and statistics.
    result, _ := graph.Query(query)

    // Pretty-print the full result set as a table.
    result.PrettyPrint()

    // Iterate over each individual Record in the result.
    fmt.Println("Visited countries by person:")
    for result.Next() { // Next returns true until the iterator is depleted.
        // Get the current Record.
        r := result.Record()

        // Entries in the Record can be accessed by index or key.
        pName := r.GetByIndex(0)
        fmt.Printf("\nName: %s\n", pName)
        pAge, _ := r.Get("p.age")
        fmt.Printf("\nAge: %d\n", pAge)
    }

    // Path matching example.
    query = "MATCH p = (:person)-[:visited]->(:country) RETURN p"
    result, err := graph.Query(query)
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }
    fmt.Println("Pathes of persons visiting countries:")
    for result.Next() {
        r := result.Record()
        p, ok := r.GetByIndex(0).(rg.Path)
        fmt.Printf("%s %v\n", p, ok)
    }
}

Running the above produces the output:

+----------+-------+--------+
|  p.name  | p.age | c.name |
+----------+-------+--------+
| John Doe |    33 | Japan  |
+----------+-------+--------+

Query internal execution time 1.623063

Name: John Doe

Age: 33

Running queries with timeouts

Queries can be run with a millisecond-level timeout as described in the module documentation. To take advantage of this feature, the QueryOptions struct should be used:

options := NewQueryOptions().SetTimeout(10) // 10-millisecond timeout
res, err := graph.QueryWithOptions("MATCH (src {name: 'John Doe'})-[*]->(dest) RETURN dest", options)

ParameterizedQueryWithOptions and ROQueryWithOptions endpoints are also exposed by the client.

Running tests

A simple test suite is provided, and can be run with:

$ go test

The tests expect a Redis server with the RedisGraph module loaded to be available at localhost:6379

License

redisgraph-go is distributed under the BSD3 license - see LICENSE