Home/ Questions/Q 8863511
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-14T15:59:47+00:00

Simple question: I would like to react to some changes in a database, but

  • 0

Simple question: I would like to react to some changes in a database, but only to those changes which are causing modifications in a certain view1. That is, I am not interested in all changes in the database, just those changes which are affecting view1. I am not talking about filter here, just about view+changes. Something like this (although this is probably not correct):

http://localhost:5984/db/_design/doc1/_view/view1/_changes

Is this at all supported by CouchDB? Does this makes sense at all?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    It’s possible, but in a little another way. Since 1.1.0 release CouchDB is able to use map function as filters for changes feed. This works as like regular filters: if key-value pair was emitted at least once for changed document it means that he passes filter and _changes yields the record about him. If you need get only new updates for specific view, you need to specify staring since seq number – it could be easily retrieved from _design/ddoc-name/_info resource from field view_index/update_seq. Since 1.3 release you may also specify since=now to listen updates from current point of time.

    Note, that this view filters doesn’t uses view index and doesn’t updates him while new changes occurs. Also, there is set of patches that improves view filters in the way that you may be also interested.

    • 0