implement Get person endpoint

backend/memgraph/create_schema.go

@@ -0,0 +1,67 @@
+package memgraph
+
+import (
+	"log"
+	"time"
+
+	"github.com/neo4j/neo4j-go-driver/v5/neo4j"
+	"golang.org/x/net/context"
+)
+
+const dbCreateSchemaTimeout = 10 * time.Second
+
+func createIndexes(driver neo4j.DriverWithContext) error {
+	ctx, cancel := context.WithTimeout(context.Background(), dbCreateSchemaTimeout)
+	defer cancel()
+
+	session := driver.NewSession(ctx, neo4j.SessionConfig{AccessMode: neo4j.AccessModeWrite})
+	defer session.Close(ctx)
+
+	indexes := []string{
+		`CREATE INDEX ON :Person(ID);`,
+		`CREATE INDEX ON :Person(Surname);`,
+		`CREATE INDEX ON :Person(Firstname);`,
+		`CREATE INDEX ON :Person(Born);`,
+		`CREATE INDEX ON :Person(MothersFirstName);`,
+		`CREATE INDEX ON :Person(MothersSurname);`,
+	}
+
+	// Run index queries via implicit auto-commit transaction
+	for _, index := range indexes {
+		_, err := session.Run(ctx, index, nil)
+		if err != nil {
+			log.Panicln(err)
+		}
+	}
+
+	return nil
+}
+
+func createConstraints(driver neo4j.DriverWithContext) error {
+	ctx, cancel := context.WithTimeout(context.Background(), dbCreateSchemaTimeout)
+	defer cancel()
+
+	session := driver.NewSession(ctx, neo4j.SessionConfig{AccessMode: neo4j.AccessModeWrite})
+	defer session.Close(ctx)
+
+	constraints := []string{
+		`CREATE CONSTRAINT ON (n:Person) ASSERT EXISTS (n.ID);`,
+		`CREATE CONSTRAINT ON (n:Person) ASSERT EXISTS (n.Surname);`,
+		`CREATE CONSTRAINT ON (n:Person) ASSERT EXISTS (n.Firstname);`,
+		`CREATE CONSTRAINT ON (n:Person) ASSERT EXISTS (n.Born);`,
+		`CREATE CONSTRAINT ON (n:Person) ASSERT EXISTS (n.MothersFirstName);`,
+		`CREATE CONSTRAINT ON (n:Person) ASSERT EXISTS (n.MothersSurname);`,
+		`CREATE CONSTRAINT ON (n:Person) ASSERT n.ID IS UNIQUE;`,
+		`CREATE CONSTRAINT ON (n:Person) ASSERT n.Surname, n.Firstname, n.Born, n.MothersFirstName, n.MothersSurname IS UNIQUE;`,
+	}
+
+	// Run index queries via implicit auto-commit transaction
+	for _, constraint := range constraints {
+		_, err := session.Run(ctx, constraint, nil)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

backend/memgraph/init_database.go

@@ -21,5 +21,13 @@ func InitDatabase(dbUri, dbUser, dbPassword string) neo4j.DriverWithContext {
 		log.Panicln(err)
 	}
 
+	if err := createIndexes(driver); err != nil {
+		log.Panicln(err)
+	}
+
+	if err := createConstraints(driver); err != nil {
+		log.Panicln(err)
+	}
+
 	return driver
 }