[COUCHDB-2668] Regression: attachment Etag references to document revision, not to digest

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: Database Core, HTTP Interface
• Security Level: public (Regular issues)
• Labels: regression
• Assignee: Robert Newson
• Reporter: Alexander Shorin
• Created: 19/Apr/15 01:22
• Updated: 19/Apr/15 10:51
• Resolved: 19/Apr/15 10:51

Description

In CouchDB 1.6.1:

$ curl -XPUT http://localhost:5984/db/doc/att -d 'Hello, CouchDB!' -H "Content-Type: text/plain"
{"ok":true,"id":"doc","rev":"1-3ead39fb9d2538602f817e0bdc00fe26"}

$ curl -XGET -v http://localhost:5984/db/doc/att
* Hostname was NOT found in DNS cache
*   Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 5984 (#0)
> GET /db/doc/att HTTP/1.1
> User-Agent: curl/7.39.0
> Host: localhost:5984
> Accept: */*
> 
< HTTP/1.1 200 OK
< Server: CouchDB/1.7.0 (Erlang OTP/17)
< ETag: "+4vGmBKGmQoMe7ojcTyiSA=="
< Date: Sun, 19 Apr 2015 01:17:41 GMT
< Content-Type: text/plain
< Content-Length: 15
< Cache-Control: must-revalidate
< Accept-Ranges: none
< 
* Connection #0 to host localhost left intact
Hello, CouchDB!%   

In CouchDB 2.0:

$ curl -XPUT http://localhost:15984/db/doc/att -d 'Hello, CouchDB!' -H "Content-Type: text/plain"
{"ok":true,"id":"doc","rev":"1-3ead39fb9d2538602f817e0bdc00fe26"}

$ curl -XGET -v http://localhost:15984/db/doc/att
* Hostname was NOT found in DNS cache
*   Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 15984 (#0)
> GET /db/doc/att HTTP/1.1
> User-Agent: curl/7.39.0
> Host: localhost:15984
> Accept: */*
> 
< HTTP/1.1 200 OK
< Server: CouchDB/42c9047 (Erlang OTP/17)
< ETag: "1-3ead39fb9d2538602f817e0bdc00fe26"
< Date: Sun, 19 Apr 2015 01:14:11 GMT
< Content-Type: text/plain
< Content-Length: 15
< Cache-Control: must-revalidate
< Accept-Ranges: none
< 
* Connection #0 to host localhost left intact
Hello, CouchDB!%

If document becomes updated, but attachment does not, their Etag changes as well:

$ curl -XGET -v http://localhost:15984/db/doc/att
* Hostname was NOT found in DNS cache
*   Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 15984 (#0)
> GET /db/doc/att HTTP/1.1
> User-Agent: curl/7.39.0
> Host: localhost:15984
> Accept: */*
> 
< HTTP/1.1 200 OK
< Server: CouchDB/42c9047 (Erlang OTP/17)
< ETag: "3-90c8a1947115ffb2032a217ed3d3c624"
< Date: Sun, 19 Apr 2015 01:15:55 GMT
< Content-Type: text/plain
< Content-Length: 15
< Cache-Control: must-revalidate
< Accept-Ranges: none
< 
* Connection #0 to host localhost left intact
Hello, CouchDB!%