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From "Jason Smith (JIRA)" <>
Subject [jira] Updated: (COUCHDB-802) Doc ID should auto-generate if not provided, before sending to _update function [PATCH]
Date Wed, 16 Jun 2010 07:38:23 GMT


Jason Smith updated COUCHDB-802:

    Attachment: new_id.diff

One-line change so the logic in the OP would work. Unfortunately I haven't had the time to
make the test case. I will attach that in a subsequent message.

> Doc ID should auto-generate if not provided, before sending to _update function [PATCH]
> ---------------------------------------------------------------------------------------
>                 Key: COUCHDB-802
>                 URL:
>             Project: CouchDB
>          Issue Type: Bug
>          Components: HTTP Interface, JavaScript View Server
>    Affects Versions: 0.11
>         Environment: Linux
>            Reporter: Jason Smith
>            Priority: Minor
>             Fix For: 0.11.1
>         Attachments: new_id.diff
>   Original Estimate: 24h
>  Remaining Estimate: 24h
> The main bug is this: _show and _update functions should be able to mimic the standard
HTTP/JSON API. A common pattern people are moving to is rewriting to _show and _update, so
the client thinks it is hitting normal couch, however additional logic happens (e.g. auto-timestamping).
> Unfortunately, _update cannot return an auto-generated ID for POST to /db/_design/ddoc/_update.
The semantics should match POST to /db/ -- If an _id is provided, use that; otherwise auto-generate
one. The best an _update function can do now is Math.random() or similar; however one loses
the advantage of sequential UUID generation from couch's internals.
> The fix is for couch to send a random UUID if the update URL did not include the final
/Id component. The function itself in the view server can decide whether to use it. Assuming
that change, the update function could at least be capable of duplicating the direct API using
the following Javascript logic:
>   function(doc, req) {
>     if(doc && doc._id == {
>       // To be pedantic, I could confirm req.method == "PUT"
>       log("I am an update by id");
>     } else if(doc === null && {
>       if(req.method == "POST") {
>         log("I am a create, id was auto-generated");
>       } else if(req.method == "PUT") {
>         log("I am a create, id was supplied by client");
>       }
>     }
>   }

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