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https://issues.apache.org/jira/browse/COUCHDB-1391?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13194961#comment-13194961
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Paul Joseph Davis commented on COUCHDB-1391:
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> Can you explain couch_db.erl:705? Why did the list brackets appear around the
> doc? I'm guessing that's the format new_revs wants.
Lots of code I reused wants to have lists of docs with the same _id. Instead of
rewriting everything else I just used the same structure.
> add a clause to get_doc_infos/2.
Do you mean get_full_doc_infos? If so, that seems like it should work quite
nicely. I'll take a crack at that this afternoon.
> the line "Db1#db{security_ptr=local};" is redundant
Good catch. Will fix.
> Am I right that at these lines update a db as soon as it's opened?
Yep.
> I was wondering why I didn't see more backwards-compatibility code anywhere.
That's mostly all there is. I realized last night that I have to wrap the local
docs btree split fun to upgrade docs on the fly, but that should be simple
enough.
> couch_db_updater:init_security/2 needs to be fixed
Good catch. That should be passing Db0 to update_local_docs/2.
> Any reason why copy_docs can't be changed to take a btree argument?
Yes, copy_docs is working with the by_seq btree which doesn't work for local
docs. I contemplated refactoring here, but for now I'd just erred on the side
of caution. After having spelunked through this code I've decided that a real
fix is going to require me groking couch_db.erl and couch_db_updater.erl and
doing similar level refactor to what I did for the view engine.
> What's the change in couch_replicator?
This was me not understanding the replicator / thinking very hard. I'm going to
rewrite the split fun for the local docs btree to automatically upgrade old
_local docs records on the fly which should make this code unnecessary.
Thanks for the review. I'll get a revised version up tonight or tomorrow
depending on time.
> Implement _security as _local doc with revision trees
> -----------------------------------------------------
>
> Key: COUCHDB-1391
> URL: https://issues.apache.org/jira/browse/COUCHDB-1391
> Project: CouchDB
> Issue Type: Improvement
> Components: Database Core
> Reporter: Paul Joseph Davis
> Attachments: 0001-Refactor-revision-merging.patch,
> 0002-Replace-_local-doc-sequence-with-revision-trees.patch,
> 0003-Prevent-multiple-updates-to-a-single-_local-doc.patch,
> 0004-Implement-_security-as-a-_local-doc.patch
>
>
> We had a discussion [1] a while back about updating the _security object so
> that it could be replicated (internally) in a cluster or similar environment.
> The basic gist was "update _local docs to have a revision tree, update
> _security to be a _local doc with docid "_local/_security" and keep the
> current _security API for a version or two for backwards compatibility (or
> forever, what color is your bike shed?)"
> So I did that.
> Basic patch progression is:
> 1. Refactor revision merging logic so that we can split it out of
> couch_db_updater's code path for updating normal docs.
> 2. Implement _local docs with #full_doc_info{} records (and thus revision
> trees)
> 3. Implement _security as _local/_security
> These things are done. Tests should theoretically pass after each patch but I
> haven't gone back and tried. They definitely pass (minus auth_cache which I
> just submitted a fix for) now except for replication.js appears to fail for
> random reasons. I can't quite decide if I've introduced this or if it just
> fails randomly. Rather than run it a lot more times and continue to be
> confused I'm starting this ticket so I can have other people test and tell me
> their results.
> Also, the test suite is rather wonky on trunk with segfaults. We should
> really look into that more.
> Patches forth coming. I've also pushed the branch to [2].
> [1]
> http://grokbase.com/t/couchdb.apache.org/dev/2011/08/the-security-object-should-be-versioned/17rfmmtlu3lagqvgyq7cay26dqk4
> [2]
> http://git-wip-us.apache.org/repos/asf?p=couchdb.git;a=log;h=refs/heads/new-security-object
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