fix detect column type of enum

enum includes text or blob or ... hooked by wrong regex

activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb

@@ -82,6 +82,8 @@ module ActiveRecord
 
         def extract_limit(sql_type)
           case sql_type
+          when /^enum\((.+)\)/i
+            $1.split(',').map{|enum| enum.strip.length - 2}.max
           when /blob|text/i
             case sql_type
             when /tiny/i
@@ -98,8 +100,6 @@ module ActiveRecord
           when /^mediumint/i; 3
           when /^smallint/i;  2
           when /^tinyint/i;   1
-          when /^enum\((.+)\)/i
-            $1.split(',').map{|enum| enum.strip.length - 2}.max
           else
             super
           end

activerecord/test/cases/adapters/mysql/enum_test.rb

@@ -5,6 +5,6 @@ class MysqlEnumTest < ActiveRecord::TestCase
   end
 
   def test_enum_limit
-    assert_equal 5, EnumTest.columns.first.limit
+    assert_equal 6, EnumTest.columns.first.limit
   end
 end

activerecord/test/cases/adapters/mysql2/enum_test.rb

@@ -5,6 +5,6 @@ class Mysql2EnumTest < ActiveRecord::TestCase
   end
 
   def test_enum_limit
-    assert_equal 5, EnumTest.columns.first.limit
+    assert_equal 6, EnumTest.columns.first.limit
   end
 end

activerecord/test/schema/mysql2_specific_schema.rb

@@ -52,7 +52,7 @@ SQL
 
   ActiveRecord::Base.connection.execute <<-SQL
 CREATE TABLE enum_tests (
-  enum_column ENUM('true','false')
+  enum_column ENUM('text','blob','tiny','medium','long')
 )
 SQL
 end

activerecord/test/schema/mysql_specific_schema.rb

@@ -63,7 +63,7 @@ SQL
 
   ActiveRecord::Base.connection.execute <<-SQL
 CREATE TABLE enum_tests (
-  enum_column ENUM('true','false')
+  enum_column ENUM('text','blob','tiny','medium','long')
 )
 SQL