I think Mango needs _something_ to allow folks to process data between the document and the index - thanks for posting Jan!.
I had a think about this and came up with another simpler syntax which is in this gist: https://gist.github.com/glynnbird/ad932de13eb0e276e6ffab5fcaa350f8 Cheers Glynn On Fri, 26 Nov 2021 at 15:05, Adam Kocoloski <kocol...@apache.org> wrote: > Hi Jan, good stuff. I think it’s worth expanding into an RFC if this is a > limitation that you see users bumping into frequently. Some thoughts: > > - We’ll want to address the case where a virtual field clashes with a > “physical" field in a doc. Should the value of the virtual field override > the one in the document? I think so. > > - I can imagine users wanting to apply these functions conditionally, e.g. > to do schema evolution on read where they’ve got older documents that > serialized a field in a different format than they’re currently using for > new inserts. I’m OK with “use a view” being our response to that case, but > figured I’d bring it up. > > - We’ve had occasional conversations about how to integrate views into > Mango so that _find could be a common endpoint for interrogating the DB. > Last time I thought about it a combination of “use_index” and a > registration of the keys and values from the view as virtual fields seemed > like a sane way to do it. It’s a separate topic but I’m wondering if the > query interface ends up looking similar for two features. > > Cheers, Adam > > > On Nov 23, 2021, at 12:27 PM, Jan Lehnardt <j...@apache.org> wrote: > > > > Hi all, > > > > I had some time playing with an idea that I wanted to see happen for a > long time: value manipulation functions for Mango. > > > > The goal here is to allow more flexible indexing with Mango. It’ll not > be a super flexible solution like JS views, but I think it is a neat > addition. > > > > I’ve drafted things up with a small example patch and I’m looking for > feedback whether y’all are interested in me turning this into a proper RFC: > > > > https://gist.github.com/janl/e5469f6f08c9be0405f31451889d5030 > > > > h/t Adam for scope-creeping the “& Values” part into this ;) We can do > that separately, if folks prefer. > > > > Best > > Jan > > — > > Professional Support for Apache CouchDB: > > https://neighbourhood.ie/couchdb-support/ > > > > 24/7 Observation for your CouchDB Instances: > > https://opservatory.app > > > >
