Ability to set last-modified of s3 keys

with the current S3 API it’s impossible to set the last-modified time of an S3 key, however this is very useful for testing.

I found a hacky way of doing this via:

key = self._moto_svc._main_app.app_instances['s3'].view_functions['ResponseObject.key_response'].callback.__self__.backend.buckets[BUCKET_NAME].keys[KEY_NAME]
key.last_modified = LAST_MODIFIED

however it would be really useful if there was a better way to access the underlying bucket to be able to set properties like this.

[czechnology]

FYI, in newer versions you have to use:

key = moto.s3.models.s3_backends["123456789012"]["global"].buckets[BUCKET_NAME].keys[KEY_NAME]

[johncalvinyoung]

@spulec any hope of getting a way to do this in standalone server mode? I’m using moto with a Rails app and test suite, and we’re depending on last-modified logic for some tests I’d love to do in moto.