[COUCHDB-188] _bulk_docs fails when deleting and adding a doc with the same id

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.9
• Fix Version/s: 1.3
• Component/s: Database Core

Environment

CouchDB revision 730414.

• Skill Level: Regular Contributors Level (Easy to Medium)
• Assignee: Filipe David Borba Manana
• Reporter: Matt Goodall
• Created: 31/Dec/08 17:00
• Updated: 07/Jan/12 13:21
• Resolved: 07/Jan/12 13:21

Description

CouchDB returns a "412 Precondition Failed" when the list of changes sent to _bulk_docs deletes a document and later creates a document with the same id as the deleted document:

{"docs": [

{"_id": "docid", "_rev": "<rev>", "_deleted": true}

,

{"_id": "docid"}

]}

Once fixed, the response JSON document will return the same docid twice in the list but it's presumably ordered consistently with the request data so any client should be able to understand the response.

Demonstrating the problem using curl is easy enough:

$ curl -X PUT http://localhost:5984/test

{"ok":true}

$ curl -X PUT -d "{}" http://localhost:5984/test/docid

{"ok":true,"id":"docid","rev":"4140747751"}

$ curl -X POST -d '{"docs": [

{"_id": "docid", "_rev": "4140747751", "_deleted": true}

,

{"_id": "docid"}

]}' http://localhost:5984/test/_bulk_docs

{"error":"conflict","reason":"Document update conflict."}

Note: this is likely related to COUCHDB-172.