mysql命令在没有-u根的rails中不起作用

我似乎不能用mysql检查我的数据库,我是一个有点新的,我不知道怎么做,即使在阅读了相关的文章。

Rails 4.1.5 适配器gem是 gem 'mysql2', '~> 0.3.0' .

mysql --version
mysql  Ver 14.14 Distrib 5.7.23,

我想继续讨论这个问题,因为现在很难改变传统的应用程序。

这是我的数据库.yml:

development:
  adapter: mysql2
  database: some_development
  username: root
  password:
  host: localhost
  port: 3306

这样做有效:

mysql -u root -p some_development
Enter password:
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 47
Server version: 5.7.23 Homebrew

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show tables;
+--------------------------------+
| Tables_in_some_development |
+--------------------------------+
| activities                     |
| addresses                      |
| associated_products            |

如果我这样尝试:

mysql some_development
ERROR 1045 (28000): Access denied for user 'jwan'@'localhost' (using password: NO)

它失败了。