AWS EventBridge Rule Ignoring Key Prefix & Suffix Matching-CodePudding

I have an Event Bridge rule created where when I drop a file into an S3 bucket it will trigger a Step function.

I only want to trigger this rule when:

A file is in a folder called files/ (prefix: "files/")
The file is a CSV (suffix: ".csv")

However this rule is being triggered for any files regardless of their suffix and prefix. For instance I dropped a .pdf file in and it triggered the step function.

    {
      "detail-type": ["Object Created"],
      "source": ["aws.s3"],
      "detail": {
        "bucket": {
          "name": ["my-files-bucket"]
        },
        "object": {,
          "key": [{
            "prefix": "files/"
          }, {
            "suffix": ".csv"
          }]
        }
      }
    }

CodePudding user response：

This is the expected behaviour. EventBridge treats multiple values in brackets as an OR condition. Events will match your pattern if the object key begins with files/ OR ends with .csv.

As far as I know, it's not possible to apply an AND condition to a single field.