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node.jsでneo4jのOGMを使う①とりあえず動かしてみる

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node.jsでOGM(オブジェクトグラフマッピング)を使うと簡単にデータにアクセスできます。

#環境変数の設定

①dotenvをインストールします。

npm i --save dotenv

②.envファイルをプロジェクトのディレクトリに作成

/.env
// .env
NEO4J_PROTOCOL=neo4j
NEO4J_HOST=localhost
NEO4J_USERNAME=neo4j
NEO4J_PASSWORD=neo4j
NEO4J_PORT=7687
NEO4J_DATABASE=neo4j
NEO4J_ENCRYPTION=ENCRYPTION_OFF

#neodeのインストール

npm install --save neode

modesディレクトリを作成してモデルを定義

/model/user.js
module.exports = {
  id: {
    type: 'uuid',
    primary: true
  },
  name: 'string'
}
index.js
var neode = require('neode');
const instance = new Neode.fromEnv();//①.evnの設定でnoe4jデータベースに接続
instance.withDirectory(__dirname+'/../model');//②modelディレクトリ内のモデル定義を読み込み
instance.model("user").all() //③userをすべて読み込み
.then(collection => {//④userの読み込みに成功した場合の処理
            console.log(collection.length); // 1
            console.log(collection.get(0).get('name')); // 'Adam'
})

neo4jデータベースにテストデータ挿入
create (:user{uuid:"100",name:"test太郎"})

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