extracts Mongo::Truncation module

lib/database_cleaner/mongo/truncation.rb

@@ -0,0 +1,22 @@
+module DatabaseCleaner
+  module Mongo
+    module Truncation
+      
+      def clean
+        if @only
+          collections.each { |c| c.remove if @only.include?(c.name) }
+        else
+          collections.each { |c| c.remove unless @tables_to_exclude.include?(c.name) }
+        end
+        true
+      end
+
+      private
+      
+      def collections
+        database.collections.select { |c| c.name !~ /^system/ }
+      end
+
+    end
+  end
+end

lib/database_cleaner/mongo_mapper/truncation.rb

@@ -1,35 +1,18 @@
 require 'database_cleaner/mongo_mapper/base'
 require 'database_cleaner/generic/truncation'
+require 'database_cleaner/mongo/truncation'
 
 module DatabaseCleaner
   module MongoMapper
     class Truncation
       include ::DatabaseCleaner::MongoMapper::Base
       include ::DatabaseCleaner::Generic::Truncation
-
-      def clean
-        if @only
-          collections.each { |c| c.remove if @only.include?(c.name) }
-        elsif @tables_to_exclude
-          collections.each { |c| c.remove unless @tables_to_exclude.include?(c.name) }
-        else
-          collections.each { |c| c.remove }
-        end
-        true
-      end
+      include ::DatabaseCleaner::Mongo::Truncation
       
       private
 
-      def connection
-        ::MongoMapper.connection
-      end
-
-      def collections
-        connection.db(database).collections.select { |c| c.name !~ /^system/ }
-      end
-
       def database
-        ::MongoMapper.database.name
+        ::MongoMapper.database
       end
     end
   end

lib/database_cleaner/mongoid/truncation.rb

@@ -1,25 +1,18 @@
 require 'database_cleaner/mongoid/base'
 require 'database_cleaner/generic/truncation'
+require 'database_cleaner/mongo/truncation'
 
 module DatabaseCleaner
   module Mongoid
     class Truncation
       include ::DatabaseCleaner::Mongoid::Base
       include ::DatabaseCleaner::Generic::Truncation
-
-      def clean
-        if @only
-          collections.each { |c| c.remove if @only.include?(c.name) }
-        else
-          collections.each { |c| c.remove unless @tables_to_exclude.include?(c.name) }
-        end
-        true
-      end
+      include ::DatabaseCleaner::Mongo::Truncation
 
       private
 
-      def collections
-        ::Mongoid.database.collections.select { |c| c.name !~ /^system/ }
+      def database
+        ::Mongoid.database
       end
 
   end