Jan Lehnardt wrote:
On 18 Feb 2009, at 10:45, Sho Fukamachi wrote:
Hi Couchists,
Having in some cases multiple attachments per document, I would like
to be able to store some metadata next to each attachment - the
width/height of a picture, for example, or the bitrate of an mp3.
Obviously it would be nice if I could do it in the same place as the
MIME type, byte size, etc. However, I can't find any way to get data
in there.
Is this possible / desirable / should I be doing something else?
This is not currently possible but I think this sounds interesting.
It came up with CouchApp where we want to store checksums
with the files (although this feature is no longer needed with per-
attachment ETags). hmm. I'm worrying a bit about the underlying
data storage changes. This would effectively a document within
a document and I don't know how flexible the attachment meta
data store is.
CouchApp solves this now by maintaining a mirrored sub-object
in the main document that it syncs with the _attachments structure.
While not really neat, it can be fully automated and put into a library.
Can you open a issue on JIRA for this so we can discuss this
on d...@?
https://issues.apache.org/jira/browse/COUCHDB
Cheers
Jan
--
There is still the problem of attachment identity that is also the root
of https://issues.apache.org/jira/browse/COUCHDB-217 .
There would be an easy solution if this was implemented you just would
have to add a "attachment_meta" object to your document that maps the
attachment revision to its metadata.
Regards,
Sven Helmberger
