Custom event pattern for AWS event bridge

Question

I am trying to add a rule using below code

const rule = new Rule(this, 'rule', {
        eventBus: bus,
        eventPattern: {
            "message_data": {
                "type": [{ 'equals-ignore-case': 'customer_' }],
            },
        },
        ruleName: `${stackId}-rule`,
    });

my JSON event:

{

"message_data":{
  "id": "2779e723-dadc-48fe-9a2b-291874cd4463",
  "version": "1.0",
  "type": "customer"
  }
}

When I trying to deploy. It is failing with error

  Object literal may only specify known properties, and 'message_data' does not exist in type 'EventPattern'.

Any inputs? Thankyou.

Answer 1

In a Rule, eventPattern must adhere to the EventPattern interface. message_data is not a property of that interface. It's difficult to tell what you're trying to achieve here, but this will likely remediate that specific error.

const rule = new Rule(this, 'rule', {
  eventBus: bus,
  eventPattern: {
    detail: {
      "message_data": {
        "type": [{ 'equals-ignore-case': 'customer_' }],
      },
    },
  },
  ruleName: `${stackId}-rule`,
});