fix #1

README.markdown

@@ -172,20 +172,20 @@ After following the steps above your database will be converted to utf8mb4, and
 
 Create an initializer named `config/initializers/ar_innodb_row_format.rb` and paste the following code:
 
-    ActiveSupport.on_load :active_record do
-      module ActiveRecord::ConnectionAdapters
-        class AbstractMysqlAdapter
-          def create_table_with_innodb_row_format(table_name, options = {})
-            table_options = options.reverse_merge(:options => 'ENGINE=InnoDB ROW_FORMAT=DYNAMIC')
-
-            create_table_without_innodb_row_format(table_name, table_options) do |td|
-             yield td if block_given?
-            end
-          end
-          alias_method_chain :create_table, :innodb_row_format
-        end
-      end
+```ruby
+ActiveSupport.on_load :active_record do
+  module AbstractMysqlAdapterWithInnodbRowFormatDynamic
+    def create_table(table_name, options = {})
+      super(table_name,
+            options.reverse_merge(
+              :options => 'ENGINE=InnoDB ROW_FORMAT=DYNAMIC'))
     end
+  end
+
+  ActiveRecord::ConnectionAdapters::AbstractMysqlAdapter
+    .send(:prepend, AbstractMysqlAdapterWithInnodbRowFormatDynamic)
+end
+```
 
 In newer versions of Rails or MySQL this monkey patch may not be necessary.
 

ar_innodb_row_format.rb

@@ -1,14 +1,12 @@
 ActiveSupport.on_load :active_record do
-  module ActiveRecord::ConnectionAdapters
-    class AbstractMysqlAdapter
-      def create_table_with_innodb_row_format(table_name, options = {})
-        table_options = options.reverse_merge(:options => 'ENGINE=InnoDB ROW_FORMAT=DYNAMIC')
-
-        create_table_without_innodb_row_format(table_name, table_options) do |td|
-         yield td if block_given?
-        end
-      end
-      alias_method_chain :create_table, :innodb_row_format
+  module AbstractMysqlAdapterWithInnodbRowFormatDynamic
+    def create_table(table_name, options = {})
+      super(table_name,
+            options.reverse_merge(
+              :options => 'ENGINE=InnoDB ROW_FORMAT=DYNAMIC'))
     end
   end
+
+  ActiveRecord::ConnectionAdapters::AbstractMysqlAdapter
+    .send(:prepend, AbstractMysqlAdapterWithInnodbRowFormatDynamic)
 end