rails change database connection

To change the database connection in a Ruby on Rails application, you can follow these steps:

1. Open the config/database.yml file in your Rails project. This file contains the configuration details for different environments (e.g., development, test, production).

2. Locate the section corresponding to the environment you want to change the database connection for. For example, if you want to change the connection for the development environment, look for the development: section.

3. Within the section, you will see the adapter, encoding, pool, username, password, host, and database keys. These keys define the connection details for the database.

4. Modify the values of the adapter, host, username, password, and database keys to reflect the new connection details.

5. The adapter key specifies the database adapter to use (e.g., mysql2, postgresql, sqlite3).

6. The host key specifies the hostname or IP address of the database server.
7. The username and password keys specify the credentials required to connect to the database.

8. The database key specifies the name of the database to connect to.

9. Save the changes to the database.yml file.

After making these changes, your Rails application will use the updated database connection details for the specified environment. It's important to note that you may need to restart your Rails server for the changes to take effect.