Help translating a 2.x mongoid.yml to a 3.x format

[Daniel Doubrovkine]

We have a host list in the environment on Heroku w/ MongoHQ and the 2.x mongoid.yml looked like this:

production:

  <<: *defaults

  <% if ENV['MONGOHQ_HOST_LIST'] %>

  hosts: <%= ENV['MONGOHQ_HOST_LIST'] %>

  read_secondary: <%= !$rails_rake_task %>

  database: <%= ENV['MONGOHQ_DATABASE'] %>

  username: <%= ENV['MONGOHQ_USER'] %>

  password: <%= ENV['MONGOHQ_PASSWD'] %>

  <% else %>

  uri: <%= ENV['MONGOHQ_URL'] || '' %>

  <% end %>

How do I translate the list of hosts with the new format? I'd like to avoid hard-coding it.

--

dB. | Moscow - Geneva - Seattle - New York
dblock.org - @dblockdotorg

[Daniel Doubrovkine]

This seems to work:

production:

  sessions:

    default:

      <% if ENV['MONGOHQ_HOST_LIST'] %>

      database: <%= ENV['MONGOHQ_DATABASE'] %>

      username: <%= ENV['MONGOHQ_USER'] %>

      password: <%= ENV['MONGOHQ_PASSWD'] %>

      hosts:

      <% YAML.parse(ENV['MONGOHQ_HOST_LIST']).value.each do |v| %>

        - <%= "#{v[0].value}:#{v[1].value}" %>

      <% end %>

      <% elsif ENV['MONGOHQ_URL'] %>

      uri: <%= ENV['MONGOHQ_URL'] %>

      <% end %>

      options:

        consistency: :eventual

        safe: true

Please help improve ;)

[Daniel Doubrovkine]

And if you want my hack for Rake tasks to only go to the primary server:

consistency: :<%= !$rails_rake_task ? 'eventual' : 'strong' %>

[Daniel Doubrovkine]

Don't know what I was thinking with YAML-parsing this. It's much simpler with `eval`.

I posted a gist with our updated configuration: https://gist.github.com/4045973