Mysql 尝试存储表情符号时出错

我使用sequelize作为node.js的ORM与mysql数据库交互

我的数据库字符集是

utf8mb4，utf8mb4\u general\u ci

我的表格字符集是

utf8mb4，utf8mb4\u general\u ci

我的列类型是文本，字符集是

utf8mb4，utf8mb4\u general\u ci

在执行任何查询之前，我将执行以下代码：

Sequelize.query("SET NAMES utf8mb4");
Sequelize.query("SET CHARACTER SET utf8mb4");

执行Sequelize.query（“显示变量，如'character\u set\u%'”）后，我得到：

[ [ RowDataPacket { Variable_name: 'character_set_client', Value: 'utf8mb4' },
    RowDataPacket { Variable_name: 'character_set_connection', Value: 'utf8mb4' },
    RowDataPacket { Variable_name: 'character_set_database', Value: 'utf8mb4' },
    RowDataPacket { Variable_name: 'character_set_filesystem', Value: 'binary' },
    RowDataPacket { Variable_name: 'character_set_results', Value: 'utf8mb4' },
    RowDataPacket { Variable_name: 'character_set_server', Value: 'utf8' },
    RowDataPacket { Variable_name: 'character_set_system', Value: 'utf8' },
    RowDataPacket {
      Variable_name: 'character_sets_dir',
      Value: 'c:\\openserver\\modules\\database\\MySQL-5.7-x64\\share\\charsets\\' } ],
  [ RowDataPacket { Variable_name: 'character_set_client', Value: 'utf8mb4' },
    RowDataPacket { Variable_name: 'character_set_connection', Value: 'utf8mb4' },
    RowDataPacket { Variable_name: 'character_set_database', Value: 'utf8mb4' },
    RowDataPacket { Variable_name: 'character_set_filesystem', Value: 'binary' },
    RowDataPacket { Variable_name: 'character_set_results', Value: 'utf8mb4' },
    RowDataPacket { Variable_name: 'character_set_server', Value: 'utf8' },
    RowDataPacket { Variable_name: 'character_set_system', Value: 'utf8' },
    RowDataPacket {
      Variable_name: 'character_sets_dir',
      Value: 'c:\\openserver\\modules\\database\\MySQL-5.7-x64\\share\\charsets\\' } ] ]

但当我试图保存包含表情符号的字符串时，我遇到了一个错误：

Unhandled rejection SequelizeDatabaseError: ER_TRUNCATED_WRONG_VALUE_FOR_FIELD: Incorrect string value: '\xF0\x9F\x91\x8D\xF0\x9F...' for column 'content' at row 1

---

我也遇到了这个问题，很容易就解决了，您只需将数据库设置为utf8\u general\u ci即可。在node.js进行连接时，需要添加“charset”参数：

var pool = mysql.createPool({
    host: "host",
    user: "username",
    password: "password",
    database: "database",
    connectionLimit: xxxx,
    charset : 'utf8mb4'
});

---

这对我起了作用

我在使用Express和Sequelize将表情符号插入MySQL时遇到了同样的问题。您可以像这样确认当前角色集

SHOW VARIABLES WHERE Variable_name LIKE 'character\_set\_%' OR Variable_name LIKE 'collation%';

上面的默认连接输出如下所示

character_set_client      utf8
character_set_connection  utf8
character_set_database    utf8mb4
character_set_filesystem  binary
character_set_results     utf8
character_set_server      utf8mb4
character_set_system      utf8
collation_connection      utf8_general_ci
collation_database        utf8mb4_unicode_ci
collation_server          utf8mb4_unicode_ci

如果您的MySQL配置文件/etc/my.cnf如下所示

[client]
default-character-set = utf8mb4

[mysql]
default-character-set = utf8mb4

[mysqld]
character-set-client-handshake = FALSE
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci

但是如果你跑

SET NAMES utf8mb4;

然后，

显示变量，其中…

从上方再次更新为utf8mb4

character_set_client      utf8mb4
character_set_connection  utf8mb4
character_set_database    utf8mb4
character_set_filesystem  binary
character_set_results     utf8mb4
character_set_server      utf8mb4
character_set_system      utf8
collation_connection      utf8mb4_general_ci
collation_database        utf8mb4_unicode_ci
collation_server          utf8mb4_unicode_ci

因此，我找到的解决方案是将以下内容放在我的用户模型的第一行：

// make sure db/client/connection can support emoji
sequelize.query("SET NAMES utf8mb4;");
// confirm settings
sequelize.query("SHOW VARIABLES LIKE 'character_set_%'").then(function(data) {
     console.log(data);
});

---

utf8\u general\u ci

是字符集utf8的排序规则，它不处理表情符号。请提供

SHOW CREATE TABLE