mysql “请将character_set_database变量设置为'utf8'”在将rails应用程序部署到aws服务器时，capistrano日志说

z9smfwbn 于 2023-06-21 发布在 Mysql

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我正在尝试部署一个大约10年的项目，使用ruby 1.9.3和rails 2.3.18，最近将数据库升级到Mysql 8.0。在capistrano运行以下命令后发生错误。我用的是Capistrano 2.9.0。
executing "cd path/to/project/releases/20230614043133 && bundle exec rake RAILS_ENV=production db:migrate"
以下是完整的日志：

executing "cd path/to/project/releases/20230614043133 && bundle exec rake RAILS_ENV=production  db:migrate"
    servers: ["X.X.X.X"]
    [X.X.X.X] executing command
 ** [out :: X.X.X.X] path/to/project/shared/bundle/ruby/1.9.1/gems/rake-0.8.7/lib/rake/alt_system.rb:32: Use RbConfig instead of obsolete and deprecated Config.
 ** [out :: X.X.X.X] 
 ** [out :: X.X.X.X] (in path/to/project/releases/20230614043133)
 ** [out :: X.X.X.X] ERROR: MySQL database isn't properly encoded!
 ** [out :: X.X.X.X] Kindly set your character_set_database variable to 'utf8'.
    command finished in 5058ms

下面是database.yml设置

development:
  adapter: mysql2
  encoding: utf8
  database: db_development
  username: root
  password: secret

test:
  adapter: mysql2
  encoding: utf8
  database: db_test
  username: root
  password:

staging:
  adapter: mysql2
  encoding: utf8
  database: db_staging
  socket: /var/run/mysqld/mysqld.sock
  username: root
  password: secret

production:
  adapter: mysql2
  encoding: utf8
  database: db_production
  socket: /var/run/mysqld/mysqld.sock
  username: root
  password: secret

数据库默认设置为uft8mb3。我尝试将排序规则更改为通用ci，unicode 520，但它们也不起作用。在mysql中运行show variables;显示character_set_database变量被设置为utf8mb4。但是在选择了production_database之后，运行select @@character_set_database会显示utf8mb3作为结果。
虽然我不确定我是否走对了路，但任何帮助都将不胜感激。
编辑：我注意到无论我在database.yml中的value编码中放入什么，错误消息都变成了Kindly set your character_set_database variable to 'value'.

mysql

来源：https://stackoverflow.com/questions/76470364/kindly-set-your-character-set-database-variable-to-utf8-says-capistrano-log