ActiveRecord::Base.connected?在数据库宕机后仍返回true的问题咨询

I've run into this quirky behavior with Rails' ActiveRecord: once your Rails app establishes an initial connection to the database (DB), calling ActiveRecord::Base.connected? will still return true even if the database later becomes unavailable or crashes.

Here's how you can reproduce this issue step by step:

• Start your Rails application along with its database container (like Docker for PostgreSQL or MySQL)
• Wait until the Rails app is fully up and running, confirming it's successfully connected to the DB
• Stop the database container to simulate a database outage
• Launch a rails console session
• Check the return value of ActiveRecord::Base.connected? — you'll see it still returns true

内容的提问来源于stack exchange，提问作者Jimbali