I am trying to create and EventBridge event that triggers when objects are created in a path prefix of my bucket. When I write the event pattern without the path prefix, it works. When I add the path prefix, I get a failure. I am using official documentation for syntax and this other SO question seems to confirm what I'm doing but the solution doesn't work.

I am using EventBridge to create the rule > Step 2 Build event pattern > Event pattern.

• Error message:

Event pattern is not valid. Reason: "name" must be an object or an array at [Source: (String)"{"source":["aws.s3"],"detail-type":["Object Created"],"detail":{"bucket":{"name":"test-test-20230118"},"object":{"key":[{"prefix":"raw"}]}}}"; line: 1, column: 83]

• Unsuccessful pattern:

{
  "source": ["aws.s3"],
  "detail-type": ["Object Created"],
  "detail": {
    "bucket": {
      "name": ["test-test-20230118"]
    },
    "object": {
      "key": [{
        "prefix": "raw"
      }]
    }
  }
}

• Successful pattern without prefix:

{
  "source": ["aws.s3"],
  "detail-type": ["Object Created"],
  "detail": {
    "bucket": {
      "name": ["test-test-20230118"]
    }
  }
}

CodePudding user response：

Your pattern will work if you modify the sample event to match the name and prefix your filtering on. Ive not seen that error so not sure whats going on but i think its related to the sample event your testing your pattern against. Start again with the sample event (I copied the sample event from event type -> AWS Events, sample events -> Object Created and pasted it into "enter my own") and update resources, bucket->name and detail->object->key so your pattern will match it.

CodePudding user response：

I assume "raw" is a directory in your "test-test-20230118" bucket. If that is the case, use a slash such as "raw/" as prefix.

{
  "source": ["aws.s3"],
  "detail-type": ["Object Created"],
  "detail": {
    "bucket": {
      "name": ["test-test-20230118"]
    },
    "object": {
      "key": [{
        "prefix": "raw/"
      }]
    }
  }
}