ActiveRecord::StatementInvalid (Mysql2::Error: Incorrect string value:

ALTER TABLE `[table]` 
  CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_bin,
MODIFY [column] VARCHAR(250)
    CHARACTER SET utf8mb4 COLLATE utf8mb4_bin
然后执行迁移

ActiveRecord::StatementInvalid (Mysql2::Error: Incorrect string value:

标签：rails   测试   mysq   color   utf8mb4   方法   java   文件   table