[GitHub] kdoran commented on issue #1221: `_changes` filtered on `_doc_ids` returns unexpected `last_seq`

[GitBox]

kdoran commented on issue #1221: `_changes` filtered on `_doc_ids` returns 
unexpected `last_seq`
URL: https://github.com/apache/couchdb/issues/1221#issuecomment-377190829
 
 
   @wohali yup, sorry for the delay! Here's a quick js example I ran in the 
chrome devtools console while on the fauxton page on my local CouchDB, which is 
2.1.0 as a single node. The same discrepancy between `seq` and `last_seq` also 
happens when running this on a remote EC2 CouchDB running 2.1.1 also as a 
single node:
   
   ```
   couchUrl = 'http://localhost:5984/'
   dbName = 'sync-test'
   promise = fetch(couchUrl + dbName + '/_all_docs?limit=1&descending=true', 
     {
       headers: {'Content-Type': 'application/json'},
       credentials: 'include'
     }
   ).then(resp => resp.json()).then(response => response.rows[0].id)
   .then(doc_id => {
     return fetch(couchUrl + dbName + '/_changes?limit=10&filter=_doc_ids', 
       {
         method: 'POST', 
         body: JSON.stringify({ doc_ids: [ doc_id ] }),
         headers: {'Content-Type': 'application/json'}
       }
     ).then(resp => resp.json()).then(resp => JSON.stringify(resp, null, 2))
   })
   Promise.resolve(
     promise
   ).then(console.log)
   ```
   
   the response:
   
   ```
   {
     "results": [
       {
         "seq": 
"94-g1AAAAB5eJzLYWBgYMpgTmEQTM4vTc5ISXLIyU9OzMnILy7JAUklMiTV____PyvRGI-iPBYgydAApP6D1GYwJ2rnAgXYU1MtUsyNjLDpywIABfcnAA",
         "id": "9::remote",
         "changes": [
           {
             "rev": "1-967a00dff5e02add41819138abb3284d"
           }
         ]
       }
     ],
     "last_seq": 
"128-g1AAAACbeJzLYWBgYMpgTmEQTM4vTc5ISXLIyU9OzMnILy7JAUklMiTV____PyuDOdEnFyjAnmaanGZsmoRNAx5j8liAJEMDkPoPNc0EbFpqqkWKuZERNn1ZALTyMYU",
     "pending": 0
   }
   ```
   
   and here is the result when I run that same snippet on my local 1.6.1 
CouchDB:
   
   ```
   {
     "results": [
       {
         "seq": 9,
         "id": "9::remote",
         "changes": [
           {
             "rev": "1-967a00dff5e02add41819138abb3284d"
           }
         ]
       }
     ],
     "last_seq": 1019
   }
   ```

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org


With regards,
Apache Git Services