类型'this'的参数不能分配给参数'Construct'

问题描述

我试图将lambda函数调用到示例应用程序"堆栈中，这给我一个错误，因为我试图将其传递给参数"this".

I am trying to call a lambda function into a 'sample app' stack and it is giving me an error because I am trying to pass it a parameter of 'this'.

这是我的lambda函数

Here is my lambda function

export async function handler(event) {
    console.log("request:", JSON.stringify(event, undefined, 2));
    return {
        statusCode: 200,
        headers: { "Content-Type": "text/plain" },
        body: `Hello, CDK! You've hit ${event.path}\n`
    };
};

这是调用该函数的"app"

Here is the 'app' calling that function

//import sns = require('@aws-cdk/aws-sns');
//import subs = require('@aws-cdk/aws-sns-subscriptions');
//import sqs = require('@aws-cdk/aws-sqs');
import cdk = require('@aws-cdk/core');
import lambda = require('@aws-cdk/aws-lambda');

//Exports class from other file much like a function

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

    // Describes an AWSLambda Resource
    const hello = new lambda.Function (this, 'HelloHandler', {
      runtime: lambda.Runtime.NODEJS_8_10,    //execution environment
      code: lambda.Code.asset('lambda'),   // code loaded from the "lambda" directory
      handler: 'hello.handler'                // file is "hello", function is "handler"
    });
  }
}

我得到的错误是:

lib/cdk-workshop-stack.ts:31:39 - error TS2345: Argument of type 'this' is not assignable to parameter of type 'Construct'.
  Type 'CdkWorkshopStack' is not assignable to type 'Construct'.
    Types of property 'node' are incompatible.
      Type 'import("/Users/aroe/cdk-workshop/node_modules/@aws-cdk/core/lib/construct").ConstructNode' is not assignable to type 'import("/Users/aroe/cdk-workshop/node_modules/@aws-cdk/aws-lambda/node_modules/@aws-cdk/core/lib/construct").ConstructNode'.
        Types have separate declarations of a private property 'host'.

31     const hello = new lambda.Function(this, 'HelloHandler', {
                                         ~~~~

[1:24:08 PM] Found 1 error. Watching for file changes.

最后我正在使用Node版本v13.3.0

And finally I am using Node version v13.3.0

推荐答案

构造定义对我而言似乎正确.如果各个cdk模块的版本都不相同，则可能会发生该错误.参见类型为'this'的参数不能分配给类型为'Construct'的参数举一个例子.尝试运行 npm update ；看看是否能解决问题.

The construct definition looks right to me. That error can occur if the various cdk modules aren't all at the same version; see Argument of type 'this' is not assignable to parameter of type 'Construct' for one example of that. Try running npm update; see if that resolves the issue.

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