90 lines
2.0 KiB
Go
90 lines
2.0 KiB
Go
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package main
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import (
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"log"
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"fmt"
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"github.com/neo4j/neo4j-go-driver/v5/neo4j"
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)
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func handle_if_error(err error) {
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if err != nil {
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log.Fatal("Error occured: %s", err)
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}
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}
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func main() {
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dbUri := "bolt://localhost:7687"
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driver, err := neo4j.NewDriver(dbUri, neo4j.BasicAuth("", "", ""))
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if err != nil {
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log.Fatal("An error occurred opening conn: %s", err)
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}
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defer driver.Close()
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session := driver.NewSession(neo4j.SessionConfig{})
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defer session.Close()
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_, err = session.WriteTransaction(clearDatabase)
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handle_if_error(err)
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fmt.Println("Database cleared.")
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_, err = session.WriteTransaction(createItemFn)
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handle_if_error(err)
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fmt.Println("Record created.")
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_,err = session.WriteTransaction(testAll)
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handle_if_error(err)
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fmt.Println("All ok!")
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}
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func clearDatabase(tx neo4j.Transaction) (interface{}, error) {
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result, err := tx.Run(
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"MATCH (n) DETACH DELETE n;",
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map[string]interface{}{})
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handle_if_error(err)
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return result.Consume()
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}
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func createItemFn(tx neo4j.Transaction) (interface{}, error) {
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result, err := tx.Run(
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`CREATE (alice:Person {name: "Alice", age: 22});`,
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map[string]interface{}{})
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handle_if_error(err)
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return result.Consume()
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}
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func testAll(tx neo4j.Transaction) (interface{}, error) {
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result, err := tx.Run(
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"MATCH (n) RETURN n;",
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map[string]interface{}{})
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handle_if_error(err)
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if !result.Next() {
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log.Fatal("Missing result.")
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}
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node_record, found := result.Record().Get("n")
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if !found {
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return nil, fmt.Errorf("Wrong result returned.")
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}
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node_value := node_record.(neo4j.Node)
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fmt.Println("Record matched.")
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label := node_value.Labels[0]
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name, err := neo4j.GetProperty[string](node_value, "name")
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handle_if_error(err)
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age, err := neo4j.GetProperty[int64](node_value, "age")
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handle_if_error(err)
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if label != "Person" && name != "Alice" && age != 22 {
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return nil, fmt.Errorf("Data doesn't match.")
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}
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fmt.Println("Label", label)
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fmt.Println("name", name)
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fmt.Println("age", age)
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return result.Consume()
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}
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