Using Neo4j in Go: A Complete Guide

With the continuous development of big data and artificial intelligence, graph databases have gradually become an important field. As one of the well-known graph databases, Neo4j is popular for its high performance and ease of use. As a fast, safe and efficient programming language, Go language is also favored by developers. So how to use Neo4j in Go language? This article will introduce it to you in detail.

1. Introduction to Neo4j

Neo4j is currently one of the most popular graph databases. Its main features are:

1. High performance: One of the core advantages of Neo4j is its ability to quickly execute highly complex queries and operations.

2. Flexibility: Neo4j can store any type of data and supports multiple query languages.

3. Easy scalability: Neo4j can easily expand to more than 10 billion nodes and relationships.

4. Easy to use: Neo4j provides easy-to-understand APIs and documentation, so even if you don’t have any knowledge of graph databases, you can get started quickly.

5. Community support: Neo4j has a large community and developers that can provide sufficient support and help.

2. Install Neo4j

Before you start using Neo4j, you need to install the Neo4j database first. This can be done through the installation package provided on the official website. Users can choose any version to install, and it is recommended to choose the community version for learning and development.

1. Use Neo4j Desktop

Neo4j Desktop is an officially developed cross-platform graphical application that can help you manage multiple Neo4j instances and manage multiple databases simultaneously in the same project.

You can download the Neo4j Desktop installation package from the official website and open the application after the installation is complete.

2. Use Docker container

If you have installed Docker, you can run the Neo4j container in the following way:

docker run --publish=7474:7474 --publish=7687:7687 --env NEO4J_AUTH=neo4j/neo4j --volume=$HOME/neo4j/data:/data neo4j

The above command means using the default Neo4j user name and password, run the Neo4j container locally and map the port to the host.

3. Go language to connect Neo4j

Next, we can start operating the Neo4j graph database in Go language. First you need to install the Neo4j driver. You can use the driver library officially provided by Neo4j.

1. Install the Neo4j Go driver

To install the Neo4j Go driver, you need to download the driver library first:

go get github.com/neo4j/neo4j-go-driver/neo4j

After the driver library is installed, you can connect to the Neo4j database in the following ways:

package main

import (
    "fmt"
    "log"

    "github.com/neo4j/neo4j-go-driver/neo4j"
)

func main() {
    //通过bolt协议连接到Neo4j
    driver, err :=neo4j.NewDriver("bolt://localhost:7687", neo4j.BasicAuth("neo4j", "password", ""))
    if err != nil {
        log.Fatalf("Failed to create Neo4j driver: %v", err)
    }

    // 关闭连接
    defer driver.Close()
}

2. Execute query

After the connection is successful, you can execute the query:

func main() {

    // ...

    session, err := driver.NewSession(neo4j.SessionConfig{})
    if err != nil {
        log.Fatalf("Failed to create Neo4j session: %v", err)
    }

    // 释放session
    defer session.Close()

    // 开始事务
    tx, err := session.BeginTransaction()
    if err != nil {
        log.Fatalf("Failed to begin transaction: %v", err)
    }

    // 执行查询
    result, err := tx.Run("MATCH (n) RETURN count(n)", nil)
    if err != nil {
        log.Fatalf("Failed to run query: %v", err)
    }

    // 处理结果
    if result.Next() {
        count := result.Record().GetByIndex(0).(int64)
        fmt.Printf("Found %d nodes in the database
", count)
    }

    //提交事务
    if err := tx.Commit(); err != nil {
        log.Fatalf("Failed to commit transaction: %v", err)
    }
}

Beginners can try various query statements. In addition to MATCH and RETURN operations, there are some other query operations, such as creating nodes, creating relationships, deleting nodes, deleting relationships, etc.

4. Summary

This article briefly introduces how to use Neo4j in Go language. As a high-performance, easy-to-use graph database, Neo4j is widely used in the industry. The combination of Go language and Neo4j can provide developers with more choices and flexibility. Due to the limited length of this article, there is still much that is not covered. Readers can learn and explore more deeply through the official documentation and sample code provided by Neo4j.

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