T Yes, that's absolutely true that I can provide my own _id ..then it will return conflict staust if it is duplicated. HOWEVER, what I was asking, "Other than _id"..
Subject: RE: Validate_Doc_Update From: [email protected] Date: Thu, 18 Dec 2014 20:21:00 +0000 To: [email protected]; [email protected] You could assign your own ids that describe the contents of the document. ie. POST your own '_id' field when creating the document. If the '_id' exists it will fail with an update conflict - stopping duplicate data from being inserted. Conor On 18 December 2014 20:12:51 GMT+00:00, TAE JIN KIM <[email protected]> wrote: 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, -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
