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[AWS CDK]thisがエラーになる

Last updated at Posted at 2019-10-09

new s3.Bucket使用としたらthisがエラー(TS2345)になった。

cdk-stack.ts
import * as cdk from '@aws-cdk/core';
import * as s3 from '@aws-cdk/aws-s3';

export class CdkStack extends cdk.Stack {
    constructor(scope: cdk.Construct, id: string, props?: cdk.StackProps) {
        super(scope, id, props);

        // this ok
        const serviceName: string = this.node.tryGetContext("serviceName");

        // this error
        const originBucket = new s3.Bucket(this, `${serviceName}BucketId`, {
            bucketName: `${serviceName}-bucket`
        });
    };
}

解決策

package.json内でaws-cdkのバージョンが混合していると発生するエラーらしいのでバージョンを揃える

package.json
  "devDependencies": {
    "@aws-cdk/core": "^1.11.0",
    "@aws-cdk/aws-s3": "^1.12.0",
    "aws-cdk": "^1.11.0",
    "@types/node": "^12.7.11"
  }

package.json
  "devDependencies": {
    "@aws-cdk/core": "^1.12.0",
    "@aws-cdk/aws-s3": "^1.12.0",
    "aws-cdk": "^1.12.0",
    "@types/node": "^12.7.11"
  }

参考

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