[jira] [Commented] (COUCHDB-3094) Get doc updated on put

["Alexander Shorin (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/COUCHDB-3094?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15409284#comment-15409284 ] 

Alexander Shorin commented on COUCHDB-3094:
-------------------------------------------

Technically, you should already know the previous document state to update it since you need specify the _rev field to PUT the data. And there you can do diff locally. How it could be otherwise?

> Get doc updated on put
> ----------------------
>
>                 Key: COUCHDB-3094
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-3094
>             Project: CouchDB
>          Issue Type: Improvement
>          Components: Database Core
>            Reporter: Thaina Yu
>
> When we PUT to update document. I think it should have an option to get return as a difference between version of document, or older version (or has an option for both)
> suppose we have doc { "test0" : 0,"test1":"TT","test2":false }
> then we PUT /docID?return=diff { "test0" : "test" : "test1" : "TT" }
> we get {
>    old: { _rev:oldID, "test0" : 0,"test2":false } // no test1 because no change
>    new: {  _rev:newID, "test0" : "test" }
> }
> something like this would be useful



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