[
https://issues.apache.org/jira/browse/SOLR-2444?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13011544#comment-13011544
]
Ryan McKinley commented on SOLR-2444:
-------------------------------------
In SOLR-1566, we added this first draft at paramater parsing. As is, we have a
few things happening:
h3. Mapping Field Names
with fl=id,score we get:
{code:xml}
<doc>
<str name="id">GB18030TEST</str>
<float name="score">1.0</float></doc>
<doc>
{code}
with &fl=xxx=id,score
we get:
{code:xml}
<doc>
<float name="score">1.0</float>
<str name="xxx">GB18030TEST</str>
</doc>
{code}
id has been mapped to xxx
h3. DocTransformers
Added support to select transformers in the fl param. See
http://wiki.apache.org/solr/DocTransformers for more info (or help fill it in!)
&fl=id,\_explain\_ will give:
{code:xml}
<doc>
<str name="id">GB18030TEST</str>
<str name="_explain_">1.0 = (MATCH) MatchAllDocsQuery, product of:
1.0 = queryNorm
</str></doc>
{code}
h4. Passing argument to transformer
we can change the format with: &fl=id,\_explain:nl\_
{code:xml}
<doc>
<str name="id">GB18030TEST</str>
<lst name="_explain:nl_">
<bool name="match">true</bool>
<float name="value">1.0</float>
<str name="description">MatchAllDocsQuery, product of:</str>
<arr name="details">
<lst>
<bool name="match">true</bool>
<float name="value">1.0</float>
<str name="description">queryNorm</str>
</lst>
</arr>
</lst></doc>
{code}
Similarly, we can use the \_values\_ transformer to add a constant value to the
output
&fl=id,\_value:hello\_
{code:xml}
<doc>
<doc>
<str name="id">GB18030TEST</str>
<str name="_value:hello_">hello</str></doc>
{code}
or specify a type:
&fl=id,\_value:int:10\_
{code:xml}
<doc>
<doc>
<str name="id">GB18030TEST</str>
<int name="_value:int:10_">10</int></doc>
{code}
aliasing also works with transformers
&fl=id,ten=\_value:int:10\_
{code:xml}
<doc>
<doc>
<str name="id">GB18030TEST</str>
<int name="ten">10</int></doc>
{code}
h3. Wildcard parsing
The parser excepts wildcards -- we are not doing anything with them yet
h3. Multiple fl parameters
&fl=id,score
is equivalent to:
&fl=id&id=score
> support wildcards in fl parameter, improve DocTransformer parsing
> -----------------------------------------------------------------
>
> Key: SOLR-2444
> URL: https://issues.apache.org/jira/browse/SOLR-2444
> Project: Solr
> Issue Type: New Feature
> Reporter: Ryan McKinley
> Attachments: SOLR-2444-fl-parsing.patch, SOLR-2444-fl-parsing.patch
>
>
> The ReturnFields parsing needs to be improved. It should also support
> wildcards
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
