catalog_controller.rb

require_dependency 'vendor/plugins/blacklight/app/controllers/catalog_controller.rb'

class CatalogController < ApplicationController 
        
#    prepend_before_filter :transform_syntax

    def solr_search_params(extra_controller_params={})
        solr_parameters = super extra_controller_params
        my_parameters = solr_parameters.clone
        if my_parameters.key? :q
            my_parameters[:q].gsub!(/\S+/) { |match| 
                if match.include? ':' or match.index('=') != 0
                    match
                else
                    match.sub("=", "#{Blacklight.config[:nosyn_field]}:")
                end 
            }   
        end 
        return my_parameters
    end

    def transform_syntax
        if params.key? :q
            params[:q].gsub!(/\b#{Blacklight.config[:nosyn_field]}:/, "=")
        end 
    end 
end
~