I have a Rails reporting application that will generate reports for
other Rails applications.

As such I need to import legacy databases, but might also over time,
change them.

How do I handle migrations with having, and connecting to, x number of
databases?

I've defined the 'other' databases connections in my classes:

class OtherApp < ActiveRecord::Base
  self.abstract_class = true
  establish_connection :otherApp1_development # defined in database.yml

  def initialize
    self.establish_connection
  end
end

Yet when I use:

class CreateApplicationExampleOne < OtherApp
  def self.up
    # definitions etc
  end
end

and then try to migrate, it fails.

I hope I'm missing something small here.

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