func cleanup(db *neoism.Database) {
qs := []*neoism.CypherQuery{
&neoism.CypherQuery{
Statement: `START r=rel(*) DELETE r`,
},
&neoism.CypherQuery{
Statement: `START n=node(*) DELETE n`,
},
}
err := db.CypherBatch(qs)
if err != nil {
log.Fatal(err)
}
}
func create(db *neoism.Database) {
kirk, err := db.CreateNode(neoism.Props{"name": "Kirk", "shirt": "yellow"})
if err != nil {
log.Fatal(err)
}
fmt.Println(kirk.Properties()) // map[shirt:yellow name:Kirk] <nil>
// Ignoring subsequent errors for brevity
spock, _ := db.CreateNode(neoism.Props{"name": "Spock", "shirt": "blue"})
mccoy, _ := db.CreateNode(neoism.Props{"name": "McCoy", "shirt": "blue"})
r, _ := kirk.Relate("outranks", spock.Id(), nil) // No properties on this relationship
start, _ := r.Start()
fmt.Println(start.Properties()) // map[name:Kirk shirt:yellow] <nil>
kirk.Relate("outranks", mccoy.Id(), nil)
spock.Relate("outranks", mccoy.Id(), nil)
}
func cypher(db *neoism.Database) {
cq := neoism.CypherQuery{
Statement: `
START n=node(*)
MATCH (n)-[r:outranks]->(m)
WHERE n.shirt = {color}
RETURN n.name, type(r), m.name
`,
Parameters: neoism.Props{"color": "blue"},
Result: &[]struct {
N string `json:"n.name"`
Rel string `json:"type(r)"`
M string `json:"m.name"`
}{},
}
// db.Session.Log = true
db.Cypher(&cq)
fmt.Println(cq.Result)
// &[{Spock outranks McCoy} {Spock outranks Scottie} {McCoy outranks Scottie}]
}
func transaction(db *neoism.Database) {
qs := []*neoism.CypherQuery{
&neoism.CypherQuery{
Statement: `CREATE (n {name: "Scottie", shirt: "red"}) RETURN n`,
},
&neoism.CypherQuery{
Statement: `START n=node(*), m=node(*)
WHERE m.name = {name} AND n.shirt IN {colors}
CREATE (n)-[r:outranks]->(m)
RETURN n.name, type(r), m.name`,
Parameters: neoism.Props{"name": "Scottie", "colors": []string{"yellow", "blue"}},
Result: &[]struct {
N string `json:"n.name"` // `json` tag matches column name in query
Rel string `json:"type(r)"`
M string `json:"m.name"`
}{},
},
}
tx, _ := db.Begin(qs)
fmt.Println(qs[1].Result) // &[{Kirk outranks Scottie} {Spock outranks Scottie} {McCoy o...
tx.Commit()
}