gistfile1.txt

@shift_groups = @shifts.group_by(&:date).to_a.sort.reverse

# output of 'puts @shift_groups.inspect'

[
  [Wed, 08 Feb 2012,
    [#<Shift id: 5, user_id: 1, job_id: nil, duration: 32408, created_at: "2012-02-07 21:21:46", updated_at: "2012-02-07 21:22:32">]
  ],

  [Tue, 07 Feb 2012,
    [#<Shift id: 2, user_id: 1, job_id: nil, duration: 32400, created_at: "2012-02-06 09:56:34", updated_at: "2012-02-06 09:59:57">,
    #<Shift id: 3, user_id: 1, job_id: nil, duration: 36000, created_at: "2012-02-06 10:07:44", updated_at: "2012-02-06 10:07:44">,
    #<Shift id: 4, user_id: 1, job_id: nil, duration: 32400, created_at: "2012-02-06 10:09:56", updated_at: "2012-02-06 10:09:56">]
  ],

  [Mon, 06 Feb 2012,
    [#<Shift id: 1, user_id: 1, job_id: nil, duration: 28800, created_at: "2012-02-06 09:56:10", updated_at: "2012-02-06 09:56:10">]
  ]
]