mysql2 gem 0.3.15给出ASCII-8BIT,编码设置为"utf8"

Question

我使用MySQL 5.1.71和Rails 4.0.4在Ruby 2.0.0-p353上运行(通过rbenv + ruby​​-build),使用mysql2 gem 0.3.15.CentOS 6.5.

在database.yml中,编码设置为"utf8",适配器为所有环境的"mysql2".

我的表都使用UTF-8,"DEFAULT CHARSET = utf8 COLLATE = utf8_unicode_ci".

在Ruby中Encoding::default_internal == Encoding::default_external == Encoding::UTF_8.

关于ActiveRecord为什么还给我ASCII-8BIT字符串的原因,我还能看到其他任何想法？我在Mac上开发了UTF-8,但在Linux上生产的是ASCII-8BIT.

当我启动一个控制台并直接使用mysql2时,我得到了ASCII,所以这似乎是问题所在.

mysql> SHOW VARIABLES LIKE 'character_set%';
+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client     | utf8                       |
| character_set_connection | utf8                       |
| character_set_database   | utf8                       |
| character_set_filesystem | binary                     |
| character_set_results    | utf8                       |
| character_set_server     | utf8                       |
| character_set_system     | utf8                       |
| character_sets_dir       | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)

mysql> SHOW VARIABLES LIKE 'collation%';
+----------------------+-----------------+
| Variable_name        | Value           |
+----------------------+-----------------+
| collation_connection | utf8_general_ci |
| collation_database   | utf8_unicode_ci |
| collation_server     | utf8_unicode_ci |
+----------------------+-----------------+
3 rows in set (0.00 sec)

SHOW CREATE TABLE产品:

CREATE TABLE `product` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varbinary(255) DEFAULT NULL,
  `price` decimal(12,2) DEFAULT NULL,
  `created_at` datetime DEFAULT NULL,
  `updated_at` datetime DEFAULT NULL,
  `category` varbinary(255) DEFAULT NULL,
  `quantity` int(11) NOT NULL,
  `package_id` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `index_product_on_package_id` (`package_id`)
) ENGINE=InnoDB AUTO_INCREMENT=18 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci

Answer 1

首先检查所有服务器的 my.cnf 排序规则。你应该有类似的东西：

\n\n

[mysqld]\ninit_connect=\xe2\x80\x98SET collation_connection = utf8_unicode_ci\xe2\x80\x99\ncharacter-set-server = utf8\ncollation-server = utf8_unicode_ci\n\n[client]\ndefault-character-set = utf8\n

\n\n

Rails 中客户端的第二次检查排序规则：

\n\n

ActiveRecord::Base.connection.collation\n

\n