When in doubt, I always look at the spec. In this case: 
https://github.com/seancribbs/ripple/blob/master/riak-client/spec/riak/map_reduce/filter_builder_spec.rb

So you'll want to do something roughly like:

filter { Riak::MapReduce::FilterBuilder.new }
filter.tokenize "-", "1" do
eq "test"
end

There's a really good chance that's wrong since I'm only looking at some Ruby 
in an editor and not testing against a running Riak cluster right now. 
Hopefully that sets you on the right track or else angries up someone who will 
correct me. 
--- 
Jeremiah Peschka
Founder, Brent Ozar PLF


On Sunday, June 5, 2011 at 7:46 PM, Ryan Caught wrote:

> Hi,
> I'm having a problem with Ripple and logical operator key filters. Has anyone 
> managed to get "and" or "or" key filter combinations working?
> 
> When I run the following: 
> 
> require 'ripple'
> 
> client = Riak::Client.new
> bucket = client.bucket("test_bucket")
> 
> one = Riak::RObject.new(bucket, "test-123") 
> one.content_type = "application/json"
> one.data = '{"name": "test-123"}'
> one.store
> 
> two = Riak::RObject.new(bucket, "test-456") 
> two.content_type = "application/json"
> two.data = '{"name": "test-456"}'
> two.store
> 
> 
> results_1 = Riak::MapReduce.new(client). 
>  add("visitors", [["tokenize", "-", 1], ["eq", "test"]]).
>  map("Riak.mapValuesJson", :keep => true).run
> # Works as expected
> p results_1
> 
> results_2 = Riak::MapReduce.new(client).
>  add("visitors", [["ends_with", "123"]]).
>  map("Riak.mapValuesJson", :keep => true).run
> # Works as expected
> p results_2
> 
> results_3 = Riak::MapReduce.new(client).
>  add("test_bucket", ["and", [["tokenize", "-", 1], ["eq", "test"]],
> [["ends_with", "123"]]
>  ]). 
>  map("Riak.mapValuesJson", :keep => true).run
> # Error
> p results_3
> 
> 
> 
> 
> 
> This is what the error report says:
> 
> =ERROR REPORT==== 5-Jun-2011::19:42:34 ===
> webmachine error: path="/mapred"
> {error,{error,function_clause,
>  [{riak_client,build_exprs,
>  [[<<"and">>,
>  [[<<"tokenize">>,<<"-">>,1],
> [<<"eq">>,<<"test">>]],
>  [[<<"ends_with">>,<<"123">>]]],
> [],
> {riak_client,'riak@127.0.0.1 (mailto:riak@127.0.0.1)',<<6,82,5,153>>}]},
> {riak_client,build_filter,2},
> {riak_client,stream_list_keys,6},
> {riak_client,mapred_bucket_stream,7},
> {riak_client,mapred_bucket,6},
> {riak_kv_wm_mapred,process_post,2},
> {webmachine_resource,resource_call,3},
> {webmachine_resource,do,3}]}}
> 
> 
> 
> Any ideas? 
> _______________________________________________
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> riak-users@lists.basho.com (mailto:riak-users@lists.basho.com)
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