Set database based on how the application was started

Posted by AaronThomson on Stack Overflow See other posts from Stack Overflow or by AaronThomson
Published on 2010-05-20T01:33:09Z Indexed on 2010/05/20 1:40 UTC
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Filed under:

ruby-on-rails

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database

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continuous-integration

I have two Rails applications (lets call them APP-1 and APP-2), each of them has a dependancy on a third Rails application (APP-3).

I would like to be able to run the tests for APP-1 and APP-2 in parallel on my CI server. The problem is, both need to start up APP-3 and write to a DB via the APP-3. This causes conflicts and failures if the tests are run in parallel.

My idea for a solution is for APP-1 and APP-2 to each start their own instance of APP-3 and to have each instance point to a different DB. Is there a way to dynamically set the DB in the database.yml of APP-3 so that it connects to a different DB depending on which APP starts it up?

FYI. APP-1 and APP-2 currently start APP-3 via rake tasks.

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