Make FacetsBuilder#column use ActiveRecord::Base#columns_hash instead.

lib/searchify/facets_builder.rb

@@ -57,7 +57,7 @@ def facets_from_association(name, arguments)
     end
 
     def column(name)
-      @model_class.columns.detect { |c| c.name.to_s == name.to_s }
+      @model_class.columns_hash[name.to_s]
     end
 
     def association_reflection(name)

spec/spec_helper.rb

@@ -33,6 +33,10 @@ def self.columns
     @columns || []
   end
 
+  def self.columns_hash
+    columns.index_by{|c| c.name.to_s}
+  end
+
   def self.inspect
     "Model Mock"
   end