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https://issues.apache.org/jira/browse/COUCHDB-462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12997217#comment-12997217
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Bob Dionne commented on COUCHDB-462:
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I started reworking couch_key_tree[1] as suggested, to try and tease out some
fold style functions. This should probably be done in COUCHDB-988 but I wanted
to use has_conflicts as one of the tests. I'm able to refactor 4 or 5 so far
but it required two types of fold. I'm calling them foldl and foldr for now (no
relation to lists:foldl and lists:foldr).
So far the results are mixed in that I haven't reduced the amount of code. I'm
sticking to just reworking the functions in couch_key_tree internally and not
changing how they interact with the rest of the code. It could turn out that
some rework
of how couch_key_tree is might result in a simpler couch_key_tree.
[1] https://github.com/bdionne/couchdb/commits/462
> track conflict count in db_info (was built-in conflicts view)
> -------------------------------------------------------------
>
> Key: COUCHDB-462
> URL: https://issues.apache.org/jira/browse/COUCHDB-462
> Project: CouchDB
> Issue Type: Improvement
> Components: HTTP Interface
> Reporter: Adam Kocoloski
> Fix For: 1.2
>
> Attachments: 462-jan-2.patch, COUCHDB-462-adam-updated.patch,
> COUCHDB-462-jan.patch, conflicts_in_db_info.diff, conflicts_in_db_info2.diff,
> conflicts_view.diff, whitespace.diff
>
>
> This patch adds a built-in _conflicts view indexed by document ID that looks
> like
> GET /dbname/_conflicts
> {"rows":[
> {"id":"foo", "rev":"1-1aa8851c9bb2777e11ba56e0bf768649",
> "conflicts":["1-bdc15320c0850d4ee90ff43d1d298d5d"]}
> ]}
> GET /dbname/_conflicts?deleted=true
> {"rows":[
> {"id":"bar", "rev":"5-dd31186f5aa11ebd47eb664fb342f1b1",
> "conflicts":["5-a0efbb1990c961a078dc5308d03b7044"],
> "deleted_conflicts":["3-bdc15320c0850d4ee90ff43d1d298d5d","2-cce334eeeb02d04870e37dac6d33198a"]},
> {"id":"baz", "rev":"2-eec205a9d413992850a6e32678485900", "deleted":true,
> "deleted_conflicts":["2-10009b36e28478b213e04e71c1e08beb"]}
> ]}
> As the HTTPd and view layers are a bit outside my specialty I figured I
> should ask for a Review before Commit.
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