Ask HN: Filtering/Searching S3 Objects

I am developing an electronic document management system and will use Minio for the storage which is S3 compatible.

I wish it to not be coupled with a separate database, but it seems that you can only retrieve S3 objects with their bucket-name and object-key.

Apparently, you can not use tags to search/filter objects. I am looking at a possible solution using prefix but not sure yet if it will fit my need.

I am quite junior and would be glad to hear how did you go about solving a similar problem.

Thank you !