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AppSync×DynamoDB(READ編)

Last updated at Posted at 2022-12-01

概要

AppSyncとDynamoDBを使用した簡易的なAPIの作成方法を紹介します。

この記事では、DBのデータを取得する処理を紹介します。

前提条件

  • DynamoDBが用意されていること

AppSync

スキーマ

#登録処理(前の記事で作成済み)
input CreateRadioInput {
  id: ID!
  program_name: String
  cast: [String!]
  weekday: Int
  time: String
  favorite: Boolean
}

type Mutation {
  createRadio(input: CreateRadioInput!): Radio #登録処理(前の記事で作成済み)
}

type Query {
  getRadio(id: ID!): Radio
}

type Radio {
  id: ID!
  program_name: String
  cast: [String!]
  weekday: Int
  time: String
  favorite: Boolean
}

リゾルバー

  • リゾルバーのQueryからgetRadio(...): Radioアタッチを選択

リクエストマッピングテンプレート

{
  "version": "2017-02-28",
  "operation": "GetItem",
  "key": {
  "id": $util.dynamodb.toDynamoDBJson($ctx.args.id)
  }
}

レスポンスマッピングテンプレート

$util.toJson($ctx.result)

実行

  • クエリを実行する
    • 画面左が実行クエリ、画面右が実行結果
      クエリ
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