* meta_search now pulls directly from GitHub

* Updated gems
* [inprogress] New pagination helpers used instead of pagination presenters
* [inprogress] Favorites refactored to use ActiveRecord
* [inprogress] PostSets refactored to use a decorator/dependency injection pattern
* [inprogress] Made pool/post interaction more robust
* Pool#posts now returns an ActiveRelation object
* Fixed unit tests

config/initializers/active_record_extensions.rb

@@ -0,0 +1,39 @@
+module Danbooru
+  module Extensions
+    module ActiveRecord
+      %w(execute select_value select_values select_all).each do |method_name|
+        define_method("#{method_name}_sql") do |sql, *params|
+          connection.__send__(method_name, self.class.sanitize_sql_array([sql, *params]))
+        end
+
+        self.class.__send__(:define_method, "#{method_name}_sql") do |sql, *params|
+          connection.__send__(method_name, sanitize_sql_array([sql, *params]))
+        end
+      end
+      
+      def arbitrary_sql_order_clause(ids, table_name = nil)
+        table_name = self.class.table_name if table_name.nil?
+        
+        if ids.empty?
+          return "#{table_name}.id desc"
+        end
+        
+        conditions = []
+        
+        ids.each_with_index do |x, n|
+          conditions << "when #{x} then #{n}"
+        end
+        
+        "case #{table_name}.id " + conditions.join(" ") + " end"
+      end
+    end
+  end
+end
+
+class ActiveRecord::Base
+  class << self    
+    public :sanitize_sql_array
+  end
+
+  include Danbooru::Extensions::ActiveRecord
+end

config/initializers/core_extensions.rb

@@ -1,17 +1,5 @@
 module Danbooru
   module Extensions
-    module ActiveRecord
-      %w(execute select_value select_values select_all).each do |method_name|
-        define_method("#{method_name}_sql") do |sql, *params|
-          connection.__send__(method_name, self.class.sanitize_sql_array([sql, *params]))
-        end
-
-        self.class.__send__(:define_method, "#{method_name}_sql") do |sql, *params|
-          connection.__send__(method_name, sanitize_sql_array([sql, *params]))
-        end
-      end
-    end
-
     module String
       def to_escaped_for_sql_like
         return self.gsub(/\\/, '\0\0').gsub(/%/, '\\%').gsub(/_/, '\\_').gsub(/\*/, '%')
@@ -24,14 +12,6 @@ module Danbooru
   end
 end
 
-class ActiveRecord::Base
-  class << self    
-    public :sanitize_sql_array
-  end
-
-  include Danbooru::Extensions::ActiveRecord
-end
-
 class String
   include Danbooru::Extensions::String
 end