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https://issues.apache.org/jira/browse/SOLR-4134?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yonik Seeley reopened SOLR-4134:
--------------------------------


Reopening - I think this broke increment.

I added a test here:
http://svn.apache.org/viewvc?rev=1426373&view=rev

The increment code ends up trying to parse "[1]" because the XML loader always 
represents extended info (like atomic updates) as a List<Object>.  We should 
try to preserve as much information as possible and only use a list when there 
are multiple values (or if list syntax is actually used).
                
> Cannot "set" multiple values into multivalued field with partial updates when 
> using the standard RequestWriter.
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-4134
>                 URL: https://issues.apache.org/jira/browse/SOLR-4134
>             Project: Solr
>          Issue Type: Bug
>          Components: clients - java, update
>    Affects Versions: 4.0
>            Reporter: Will Butler
>            Assignee: Shalin Shekhar Mangar
>            Priority: Minor
>             Fix For: 4.1
>
>         Attachments: SOLR-4134.patch, SOLR-4134.patch
>
>
> I would like to "set" multiple values into a field using partial updates like 
> so:
> \\
> \\
> {code}
> List<String> values = new ArrayList<String>();
> values.add("one");
> values.add("two");
> values.add("three");
> doc.setField(field, singletonMap("set", values));
> {code}
> When using the standard XML-based RequestWriter, you end up with a single 
> value that looks like [one, two, three], because of the toString() calls on 
> lines 130 and 132 of ClientUtils. It works properly when using the 
> BinaryRequestWriter.

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