Create aliases for (long) search fields

lib/ransack/adapters/active_record/base.rb

@@ -7,7 +7,9 @@ def self.extended(base)
           alias :search :ransack unless base.respond_to? :search
           base.class_eval do
             class_attribute :_ransackers
+            class_attribute :_ransacker_aliases
             self._ransackers ||= {}
+            self._ransacker_aliases ||= {}
           end
         end
 
@@ -19,6 +21,10 @@ def ransacker(name, opts = {}, &block)
           self._ransackers = _ransackers.merge name.to_s => Ransacker
             .new(self, name, opts, &block)
         end
+
+        def ransacker_alias(alias_name, normal_name)
+          self._ransacker_aliases[alias_name.to_s] = normal_name.to_s
+        end
 
         # Ransackable_attributes, by default, returns all column names
         # and any defined ransackers as an array of strings.

lib/ransack/helpers/form_builder.rb

@@ -7,7 +7,13 @@ module ActionView::Helpers::Tags
   class Base
     private
     def value(object)
-      object.send @method_name if object # use send instead of public_send
+      search_attr = @method_name.to_s.sub(/_#{Ransack::Predicate.detect_from_string(@method_name.to_s)}$/, Ransack::Constants::EMPTY)
+      search_pred = @method_name.to_s.sub(/^#{search_attr}_/, Ransack::Constants::EMPTY)
+	    if object.klass._ransacker_aliases.has_key?(search_attr)
+        object.send "#{object.klass._ransacker_aliases[search_attr]}_#{search_pred}" if object
+      else
+        object.send @method_name if object # use send instead of public_send
+      end
     end
   end
 end

spec/ransack/adapters/active_record/base_spec.rb

@@ -335,6 +335,12 @@ def self.sane_adapter?
             expect { s.result.first }.to_not raise_error
           end
         end
+
+        describe '#ransack_alias' do
+          s1 = Person.ransack(cmnt_bd_cont: "some_words")
+          s2 = Person.ransack(comments_body_cont: "some_words")
+          expect(s1.result.to_sql).to eq(s2.result.to_sql)
+        end
 
         describe '#ransackable_attributes' do
           context 'when auth_object is nil' do

spec/support/schema.rb

@@ -81,6 +81,8 @@ class Person < ActiveRecord::Base
     SQL
     Arel.sql(query)
   end
+
+  ransacker_alias :cmnt_bd, :comments_body
 
   def self.ransackable_attributes(auth_object = nil)
     if auth_object == :admin