---
url: /ja/rules/construct-constructor-property.md
---

# construct-constructor-property

このルールは、CDK Construct の `constructor` が、以下の標準的なルールに従うことを強制します。

#### 強制されるプロパティパターン

* 命名: `scope, id` または `scope, id, props`
* 型:
  * `scope`: Construct 型
  * `id`: string 型

***

#### 🔧 使用方法

::: code-group

```ts [Oxlint]
// oxlint.config.ts
export default defineConfig({
  // ... some configs
  rules: {
    "awscdk/construct-constructor-property": "error",
  },
});
```

```js [ESLint]
// eslint.config.mjs
export default defineConfig({
  // ... some configs
  rules: {
    "awscdk/construct-constructor-property": "error",
  },
});
```

:::

#### ✅ 適切な例

```ts
import { Construct } from "constructs";

// ✅ "scope, id" プロパティ名を持つ constructor
export class MyConstruct extends Construct {
  constructor(scope: Construct, id: string) {
    super(scope, id);
  }
}
```

```ts
import { Construct } from "constructs";

export interface MyConstructProps {
  bucketName: string;
}

// ✅ "scope, id, props" プロパティ名を持つ constructor
export class MyConstruct extends Construct {
  constructor(scope: Construct, id: string, props: MyConstructProps) {
    super(scope, id);
  }
}
```

```ts
import { Construct } from "constructs";

export interface MyConstructProps {
  bucketName?: string;
}

// ✅ "scope, id, props" プロパティ名を持つ constructor (props プロパティがオプショナル)
export class MyConstruct extends Construct {
  constructor(scope: Construct, id: string, props?: MyConstructProps) {
    super(scope, id);
  }
}
```

```ts
import { Construct } from "constructs";

export interface MyConstructProps {
  bucketName: string;
}

// ✅ "scope, id, props" の後に追加プロパティを持つ constructor
export class MyConstruct extends Construct {
  constructor(scope: Construct, id: string, props: MyConstructProps, resourceName: string) {
    super(scope, id);
  }
}
```

#### ❌ 不適切な例

```ts
import { Construct } from "constructs";

// ❌ 最初のプロパティ名が "scope" でない
export class MyConstruct extends Construct {
  constructor(myScope: Construct, id: string) {
    super(myScope, id);
  }
}
```

```ts
import { Construct } from "constructs";

// ❌ 2番目のプロパティ名が "id" でない
export class MyConstruct extends Construct {
  constructor(scope: Construct, myId: string) {
    super(scope, myId);
  }
}
```

```ts
import { Construct } from "constructs";

export interface MyConstructProps {
  bucketName: string;
}

// ❌ 3番目のプロパティ名が "props" でない
export class MyConstruct extends Construct {
  constructor(scope: Construct, id: string, myProps: MyConstructProps) {
    super(scope, id);
  }
}
```

```ts
import { Construct } from "constructs";

// ❌ 最初のプロパティが "Construct" 型でない
export class MyConstruct extends Construct {
  constructor(scope: unknown, id: string) {
    super(scope, id);
  }
}
```

```ts
import { Construct } from "constructs";

// ❌ 2番目のプロパティが "string" 型でない
export class MyConstruct extends Construct {
  constructor(scope: Construct, id: number) {
    super(scope, id.toString());
  }
}
```