Added encoding qery support for SQLite3 to make rake db:charset work on all databases shipping with Rails 3

activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb

@@ -24,6 +24,17 @@ module ActiveRecord
 
   module ConnectionAdapters #:nodoc:
     class SQLite3Adapter < SQLiteAdapter # :nodoc:
+      
+      # Returns the current database encoding format as a string, eg: 'UTF-8'
+      def encoding
+        if @connection.respond_to?(:encoding)
+          @connection.encoding[0]['encoding']
+        else
+          encoding = @connection.send(:get_query_pragma, 'encoding')
+          encoding[0]['encoding']
+        end
+      end
+
     end
   end
 end

activerecord/lib/active_record/railties/databases.rake

@@ -200,6 +200,9 @@ namespace :db do
     when 'postgresql'
       ActiveRecord::Base.establish_connection(config)
       puts ActiveRecord::Base.connection.encoding
+    when 'sqlite3'
+      ActiveRecord::Base.establish_connection(config)
+      puts ActiveRecord::Base.connection.encoding
     else
       puts 'sorry, your database adapter is not supported yet, feel free to submit a patch'
     end