(events): Unable to use content based filtering patterns in detailType

[scub]

Describe the bug

When using the L2 construct for EventBridge Rules a type failure occurs when attempting to create an event bridge rule that uses content based filtering patterns. Requiring the use of a trapdoor in order to achieve the desired results.

Expected Behavior

Content based filtering patterns are supported in an events detailType

Current Behavior

Type '{ prefix: string; }' is not assignable to type 'string'

Reproduction Steps

#!/usr/bin/env node
import 'source-map-support/register';
import * as cdk from 'aws-cdk-lib';
import { Rule, CfnRule } from 'aws-cdk-lib/aws-events';

const app = new cdk.App();

const stack = new cdk.Stack(app, 'RuleTestStack');

const rule = new Rule(stack, 'Rule', {
  eventPattern: {
    detailType: [{"prefix": "shared_"}]
  }
});

Possible Solution

See https://github.com/aws/aws-cdk/pull/30222

Using a trapdoor does provide a work around

(rule.node.defaultChild as CfnRule).addOverride('Properties.EventPattern.detail-type', [{"prefix": "shared_"}])

Additional Information/Context

No response

CDK CLI Version

2.141.0

Framework Version

No response

Node.js Version

18.18.0

OS

OSX

Language

TypeScript

Language Version

Typescript 5.4.0

Other information

No response

[pahud]

Thank you for your PR.

[victorskl]

We hit to similar issue but with source field for us. We went with @ts-ignore for now. It is not an issue at EventBirdge rule side and, accepting it.

// @ts-ignore
source: [{ "anything-but": "orcabus.workflowmanager" }],