Mailing List Archive

Koji,

My apologies for the belated reply.


On Jan 12, 2008, at 11:29 AM, Koji Sekiguchi wrote:
> I have the following request handler defined in solrconfig.xml:
>
> <requestHandler name="demo" class="solr.DisMaxRequestHandler" >
> <lst name="defaults">
> <str name="echoParams">explicit</str>
> <float name="tie">0.01</float>
> <str name="qf">
> body body_exact^2.0
> </str>
> <str name="fl">
> id,body,score
> </str>
> <str name="q.alt">*:*</str>
> <str name="hl">on</str>
> <str name="hl.fl">body</str>
> <str name="f.body.hl.fragsize">0</str>
> <str name="f.body.hl.alternateField">body</str>
> </lst>
> </requestHandler>
>
> To use the request handler, I'd like to specify qt=demo for Dismax.rb.
> However, I cannot find how to do it.

Here's the trick, to benefit from the parameter handling that
Solr::Request::Dismax offers:

class DemoRequest < Solr::Request::Dismax
def initialize(params)
super
@query_type = "demo"
end
end

and even a unit test :)

def test_demo
f = DemoRequest.new(:query => "whatever")
assert_equal("demo", f.query_type)
end


Further, in general you can use solr-ruby's Solr::Connection#post
method to call into most any Solr request handler, just adhering to
the duck quacking that given here:

def post(request)
response = @connection.post(@url.path + "/" + request.handler,
request.to_s,
{ "Content-Type" =>
request.content_type })

case response
when Net::HTTPSuccess then response.body
else
response.error!
end

end

So as long as the "request" object has #handler, #to_s, and
#content_type methods. You can see how these work with the simple
Solr::Request::Base and Solr::Request::Select classes.

One nagging issue I have with the current solr-ruby design is with
the Connection#send method, which requires parallel Request and
Response classes, but if you want to build your own very simple
request/response classes you could use Connection#send even easier.

Sorry if that last bit of trivia was too much (confusing) information
- I just wanted to toss that out to show that it's actually not too
much coding to do these custom requests to Solr.

I definitely can see making solr-ruby more amenable to your "demo"-
like scenarios, as mapping custom request handlers in Solr is really
the way to go for many reasons.

Erik

Hello Erik,

> class DemoRequest < Solr::Request::Dismax
> def initialize(params)
> super
> @query_type = "demo"
> end
> end

This is a totally same way what I did to solve my problem.
I wasn't sure that my solution was reasonable in terms of Ruby,
but now I can be confident with this by your reply and your further
description.

Thank you very much, Erik!

Koji