On 17 Nov 2010, at 13:02, Wordit Ltd wrote: > On Tue, Nov 16, 2010 at 10:01 PM, Jan Lehnardt <[email protected]> wrote: >> >> function(newDoc, oldDoc, userCtX) { >> if(userCtx.roles.indexOf("_admin") == -1) { // not an admin >> if(newDoc.field > oldDoc.field) { // your condition is this >> throw({forbidden : message}); >> ... > > Many Thanks. Aha! So this is what oldDoc is good for :-) > I'm new to CouchDB and could not find a reason to specify oldDoc. > > I couldn't figure out how to pass the new value, being in a variable, > to the validation function. From this example I see that CouchDB has > both old and new fields internally which can be accessed via oldDoc > and newDoc. It seems obvious now, but although I've read the docs and > book chapters on the subject it was not clear what was happening. > > Some examples in the CouchDB book and docs, like this using oldDoc and > newDoc fields would be helpful to newbies.
Good point, I'll see if I can add this to the book. Cheers Jan --
