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ciscou/mr_distinct_year_month.rb

Created September 4, 2014 12:38
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mr_distinct_year_month.rb
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mr_distinct_year_month.rb
map = %Q{
function() {
emit("" + this.year + this.month, 1)
}
}
reduce = %Q{
function(key, values) {
return 1;
}
}
VehicleLookup.where(make: "HYUNDAI", model: "I30").map_reduce(map, reduce).out(inline: 1).to_a
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