Retrieve session without any implicit ordering

[denisj]

[rails-bot]

Thanks for the pull request, and welcome! The Rails team is excited to review your changes, and you should hear from @rafaelfranca (or someone else) soon.

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[dapi]

@denisj please click rebuild in travis. In this there was temporary error in travis

[denisj]

@dapi the errors still occur

[rafaelfranca]

Could you explain why the change?

[denisj]

@rafaelfranca I made that change to avoid implicit ordering on the primary key.

[sikachu]

Oh, interesting.

Sorry for just noticing this patch now. Would you mind rebasing against master so you'll pickup the new Travis build matrix and hopefully the CI will pass?