how to detect if you are running outside of the rails main app

Question

How can I detect that code is running outside the main rails app?

For example in a console, or in a rake task, or as part of a scheduler action, etc.

I understand that there are specific ways to do this for each case (i.e. check Rails::Console etc, but I am looking for a general way to this that will work for all cases.

To clarify a bit further. By "main rails app" I mean the "instance" of rails that is responding to http requests.

by detect you mean at runtime, retrospectively through logs, or something else? — PericlesTheo
– PericlesTheo, Commented Dec 29, 2016 at 14:45

Sean Huber · Accepted Answer · 2016-12-29 14:44:37Z

1

To check if the server is active use:

Rails.const_defined? 'Server'

answered Dec 29, 2016 at 14:44

Sean Huber

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Mitch VanDuyn Over a year ago

Thanks... works great (at least in Rails 5) do you know if this const is also defined in Rails 4? I assume so...

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