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https://issues.apache.org/jira/browse/COUCHDB-802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12879367#action_12879367
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Chris Anderson commented on COUCHDB-802:
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If anyone can add a test case I'll commit it. I can't promise I've got time to
add the test case myself. Should be a small JS test patch.
> Doc ID should auto-generate if not provided, before sending to _update
> function [PATCH]
> ---------------------------------------------------------------------------------------
>
> Key: COUCHDB-802
> URL: https://issues.apache.org/jira/browse/COUCHDB-802
> 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 == req.id) {
> // To be pedantic, I could confirm req.method == "PUT"
> log("I am an update by id");
> } else if(doc === null && req.id) {
> 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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