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From Apache Wiki <>
Subject [Couchdb Wiki] Update of "History" by JasonDavies
Date Thu, 30 Jul 2009 10:57:37 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Couchdb Wiki" for change notification.

The following page has been changed by JasonDavies:

New page:
= Proposal for CouchDB history support =

 * We will use a separate database to store history documents.
 * The main change will be at the couch_db level in the document update functions, so that
*any* change to a document will be recorded in the history database.
 * Changes to documents will result in a new document being written to the history database,
of the form:

  _id: <uuid>,
  doc: {
    <original document>

 * The history database is an ordinary CouchDB database that can be manipulated as normal
e.g. views can be added to organise the history docs as required.
 * If people need to add meta-data to the history, e.g. "last changed by", "last changed date/time",
then the recommended way would be to use a custom _update handler to add these fields to the
doc being saved, and these would propagate to the history database.

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