[RUBY] Throw raw SQL to a read replica in Rails

I use a gem called switch_point, It's written only briefly in the readme, and it's difficult to understand because no example is shown, but it seems that you can use switch_point_proxy.model_for_connection.

https://github.com/eagletmt/switch_point

For example, in the User model

use_switch_point :slave

Add like

rows = []

User.with_readonly do
  con = User.switch_point_proxy.model_for_connection.connection
  sql = "select * from users limit 1"
  rows = con.select_all(sql)
end

It seems that you can go like

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