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🤖 Sandbox code update #33

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57 changes: 24 additions & 33 deletions code/go/example.go
View file Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -3,9 +3,9 @@
package main

import (
"context"
"fmt"
"github.com/neo4j/neo4j-go-driver/v4/neo4j"
"io"
"github.com/neo4j/neo4j-go-driver/v5/neo4j"
"reflect"
)

Expand All @@ -19,46 +19,37 @@ func main() {
}
}

func runQuery(uri, database, username, password string) (result []string, err error) {
driver, err := neo4j.NewDriver(uri, neo4j.BasicAuth(username, password, ""))
func runQuery(uri, database, username, password string) (_ []string, err error) {
ctx := context.Background()
driver, err := neo4j.NewDriverWithContext(uri, neo4j.BasicAuth(username, password, ""))
if err != nil {
return nil, err
}
defer func() {err = handleClose(driver, err)}()
session := driver.NewSession(neo4j.SessionConfig{AccessMode: neo4j.AccessModeRead, DatabaseName: database})
defer func() {err = handleClose(session, err)}()
results, err := session.ReadTransaction(func(transaction neo4j.Transaction) (interface{}, error) {
result, err := transaction.Run(
`
MATCH (c:Person{name:$name})-[r:INTERACTS]->(other)
RETURN other.name as person
`, map[string]interface{}{
"name": "Jaime Lannister",
})
defer func() { err = handleClose(ctx, driver, err) }()
query := " MATCH (c:Person{name:$name})-[r:INTERACTS]->(other)
RETURN other.name as person
params := map[string]any{"name": "Jaime Lannister"}
result, err := neo4j.ExecuteQuery(ctx, driver, query, params,
neo4j.EagerResultTransformer,
neo4j.ExecuteQueryWithDatabase(database),
neo4j.ExecuteQueryWithReadersRouting())
if err != nil {
return nil, err
}
persons := make([]string, len(result.Records))
for i, record := range result.Records {
// this assumes all actors have names, hence ignoring the 2nd returned value
name, _, err := neo4j.GetRecordValue[string](record, "person")
if err != nil {
return nil, err
}
var arr []string
for result.Next() {
value, found := result.Record().Get("person")
if found {
arr = append(arr, value.(string))
}
}
if err = result.Err(); err != nil {
return nil, err
}
return arr, nil
})
if err != nil {
return nil, err
persons[i] = name
}
result = results.([]string)
return result, err
return persons, nil
}

func handleClose(closer io.Closer, previousError error) error {
err := closer.Close()
func handleClose(ctx context.Context, closer interface{ Close(context.Context) error }, previousError error) error {
err := closer.Close(ctx)
if err == nil {
return previousError
}
Expand Down
2 changes: 1 addition & 1 deletion code/javascript/example.js
View file Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
const neo4j = require('neo4j-driver');
const driver = neo4j.driver('neo4j://<HOST>:<BOLTPORT>',
neo4j.auth.basic('<USERNAME>', '<PASSWORD>'),
{/* encrypted: 'ENCRYPTION_OFF' */});
{});

const query =
`
Expand Down
24 changes: 11 additions & 13 deletions code/python/example.py
View file Open in desktop
Original file line number Diff line number Diff line change
@@ -1,22 +1,20 @@
# pip3 install neo4j-driver
# pip3 install neo4j
# python3 example.py

from neo4j import GraphDatabase, basic_auth

driver = GraphDatabase.driver(
"neo4j://<HOST>:<BOLTPORT>",
auth=basic_auth("<USERNAME>", "<PASSWORD>"))

cypher_query = '''
MATCH (c:Person{name:$name})-[r:INTERACTS]->(other)
RETURN other.name as person
'''

with driver.session(database="neo4j") as session:
results = session.read_transaction(
lambda tx: tx.run(cypher_query,
name="Jaime Lannister").data())
for record in results:
print(record['person'])

driver.close()
with GraphDatabase.driver(
"neo4j://<HOST>:<BOLTPORT>",
auth=("<USERNAME>", "<PASSWORD>")
) as driver:
result = driver.execute_query(
cypher_query,
name="Jaime Lannister",
database_="neo4j")
for record in result.records:
print(record['person'])

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