ddb-documentclient-test

DynamoDBのDocumentClientにArrayを継承した独自クラスを渡すと、 ['hoge', 'fuga', 'piyo'] となって欲しいところが { '0': 'hoge', '1': 'fuga', '2': 'piyo' } となってしまう件の検証用のリポジトリ。

Node

v12.6

packageのインストール

npm install

利用する環境変数

• AWS_ACCESS_KEY_ID
• AWS_SECRET_ACCESS_KEY
• AWS_REGION
• DDB_TABLE_NAME

データ操作

テーブル作成

npm run create

データ挿入 & 表示

npm run insert

テーブル削除

npm run delete

結果

npm run insert

> ddb-documentclient-test@0.1.0 insert /Users/xxx/ddb-documentclient-test
> npx ts-node src/insertdata.ts

Array.isArray(): true
People [
  Person { firstName: 'momotaro', lastName: 'yamada', age: 5 },
  Person { firstName: 'takashi', lastName: 'suzuki', age: 6 },
  Person { firstName: 'koichi', lastName: 'sato', age: 7 }
]
{
  "id": "extended array",
  "data": {
    "0": {
      "firstName": "momotaro",
      "lastName": "yamada",
      "age": 5
    },
    "1": {
      "firstName": "takashi",
      "lastName": "suzuki",
      "age": 6
    },
    "2": {
      "firstName": "koichi",
      "lastName": "sato",
      "age": 7
    }
  }
}
Array.isArray(): true
[
  Person { firstName: 'momotaro', lastName: 'yamada', age: 5 },
  Person { firstName: 'takashi', lastName: 'suzuki', age: 6 },
  Person { firstName: 'koichi', lastName: 'sato', age: 7 }
]
{
  "id": "raw array",
  "data": [
    {
      "firstName": "momotaro",
      "lastName": "yamada",
      "age": 5
    },
    {
      "firstName": "takashi",
      "lastName": "suzuki",
      "age": 6
    },
    {
      "firstName": "koichi",
      "lastName": "sato",
      "age": 7
    }
  ]
}
Array.isArray(): true
People [
  Person { firstName: 'momotaro', lastName: 'yamada', age: 5 },
  Person { firstName: 'takashi', lastName: 'suzuki', age: 6 },
  Person { firstName: 'koichi', lastName: 'sato', age: 7 }
]
{
  "id": "converted to raw array from extended array using Array.map()",
  "data": {
    "0": {
      "firstName": "momotaro",
      "lastName": "yamada",
      "age": 5
    },
    "1": {
      "firstName": "takashi",
      "lastName": "suzuki",
      "age": 6
    },
    "2": {
      "firstName": "koichi",
      "lastName": "sato",
      "age": 7
    }
  }
}
Array.isArray(): true
[
  Person { firstName: 'momotaro', lastName: 'yamada', age: 5 },
  Person { firstName: 'takashi', lastName: 'suzuki', age: 6 },
  Person { firstName: 'koichi', lastName: 'sato', age: 7 }
]
{
  "id": "converted to raw array from extended array using new Array(...this)",
  "data": [
    {
      "firstName": "momotaro",
      "lastName": "yamada",
      "age": 5
    },
    {
      "firstName": "takashi",
      "lastName": "suzuki",
      "age": 6
    },
    {
      "firstName": "koichi",
      "lastName": "sato",
      "age": 7
    }
  ]
}
Array.isArray(): true
[
  { firstName: 'momotaro', lastName: 'yamada', age: 5 },
  { firstName: 'takashi', lastName: 'suzuki', age: 6 },
  { firstName: 'koichi', lastName: 'sato', age: 7 }
]
{
  "id": "converted to raw array from extended array using JSON.parse(JSON.stringify(this))",
  "data": [
    {
      "firstName": "momotaro",
      "lastName": "yamada",
      "age": 5
    },
    {
      "firstName": "takashi",
      "lastName": "suzuki",
      "age": 6
    },
    {
      "firstName": "koichi",
      "lastName": "sato",
      "age": 7
    }
  ]
}