No, that's not possible. Validate doc update function only operates with document's new version candidate and the "old", current one. It cannot not access to others since this will slow down whole the process and break eventual consistency. You should run this check outside CouchDB in your client code before PUT the document. -- ,,,^..^,,,
On Thu, Dec 18, 2014 at 10:36 PM, TAE JIN KIM <[email protected]> wrote: > Hello, > > Since CouchDB provides validate_doc_update, I thought that I might be able to > provide some to check duplication here.. > like... > > function(newDoc,oldDoc,userCtx) { > if(newDoc.type == "myCustomType") { > // here..something like.. > // check newDoc against the existing documents of > "myCustomType" to see whether there was already same data or not.. > // for example, > // > getExistingDocumentsByType("myCustomType").forEach(function(doc) { > // if(newDoc.mydata == doc.mydata) { > // ///Boom..throw error.. > // } > // }); > // > > Is this something possible? Well..obviously there is no provided > getExistingDocumentsByType function from couchdb.....just was trying to show > what I was trying to achieve... > > So ultimately, my question is that..is there any way I can somehow access the > existing documents from validate_doc_update function? > > Thanks, > > > >
