So other than _id(which is uuid CouchDB provides automatically if not specified explicitly for the entire database), there is no some elegant(?) way to prevent creating duplicate data inside CouchDB?
Thanks, > Date: Thu, 18 Dec 2014 23:41:50 +0400 > Subject: Re: Validate_Doc_Update > From: [email protected] > To: [email protected] > > 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, > > > > > > > >
