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https://issues.apache.org/jira/browse/COUCHDB-2510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14243604#comment-14243604
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ASF GitHub Bot commented on COUCHDB-2510:
-----------------------------------------

GitHub user davisp opened a pull request:

    https://github.com/apache/couchdb-fabric/pull/6

    Add system db handlers to fabric_doc_update

    This hard codes the before_doc_write functions for replicator and user
    databases like they are in couch_server. This is mostly motivated by the
    fact that couch_users_db:before_doc_update/1 adds random salt values to
    user documents when a password is changed. The replicator databases are
    included at this level for consistency with couch_server.
    
    COUCHDB-2510

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/apache/couchdb-fabric 
2510-add-system-db-handlers

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/couchdb-fabric/pull/6.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #6
    
----
commit 4e0e81fd9d668bf4d532864b9cab3ad2d7653d50
Author: Paul J. Davis <[email protected]>
Date:   2014-12-12T02:13:57Z

    Add system db handlers to fabric_doc_update
    
    This hard codes the before_doc_write functions for replicator and user
    databases like they are in couch_server. This is mostly motivated by the
    fact that couch_users_db:before_doc_update/1 adds random salt values to
    user documents when a password is changed. The replicator databases are
    included at this level for consistency with couch_server.
    
    COUCHDB-2510

----


> Apply system db before_doc_update functions in fabric
> -----------------------------------------------------
>
>                 Key: COUCHDB-2510
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-2510
>             Project: CouchDB
>          Issue Type: Bug
>      Security Level: public(Regular issues) 
>          Components: Database Core
>            Reporter: Paul Joseph Davis
>            Assignee: Paul Joseph Davis
>
> This is mostly for the users db because it makes random changes to the user 
> documents before writing them to disk. In a cluster this is a guarantee that 
> we'll end up with three conflicts each time a user updates their password.
> This just hardcodes the two system databases into fabric's doc update handler 
> the same as they're hard coded in couch_server.



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