ruby on rails - Uniq method active record ordering -

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when use .uniq (active record query method), way ordening result in array. need remove ordering when use uniq.

i need keep order using .uniq method, how can solve this?

without .uniq:

[#<coupon:0x0000001cadced0   id: 838882461,   name: "how_to_code_50",   token_type: "manual",   value: 50,   quantity: 5,   available_until: sat, 15 jul 2017 18:01:24 utc +00:00,   percentual: true,   school_id: 1,   created_at: fri, 15 jul 2016 18:01:25 utc +00:00,   updated_at: fri, 15 jul 2016 18:01:25 utc +00:00>,  #<coupon:0x0000001cadc408   id: 922059944,   name: "how_to_code_70",   token_type: "manual",   value: 70,   quantity: 5,   available_until: sat, 15 jul 2017 18:01:24 utc +00:00,   percentual: true,   school_id: 1,   created_at: fri, 15 jul 2016 18:01:25 utc +00:00,   updated_at: fri, 15 jul 2016 18:01:25 utc +00:00>,  #<coupon:0x0000001cae3bb8   id: 469697148,   name: "learn_ruby_20",   token_type: "manual",   value: 20,   quantity: 10,   available_until: sat, 15 jul 2017 18:01:24 utc +00:00,   percentual: true,   school_id: 1,   created_at: fri, 15 jul 2016 18:01:25 utc +00:00,   updated_at: fri, 15 jul 2016 18:01:25 utc +00:00>,  #<coupon:0x0000001cae3190   id: 68100775,   name: "how_to_code_not_used",   token_type: "manual",   value: 1000,   quantity: 5,   available_until: sat, 15 jul 2017 18:01:24 utc +00:00,   percentual: false,   school_id: 1,   created_at: fri, 15 jul 2016 18:01:25 utc +00:00,   updated_at: fri, 15 jul 2016 18:01:25 utc +00:00>,  #<coupon:0x0000001cae2998   id: 214172726,   name: "learn_ruby_30",   token_type: "manual",   value: 30,   quantity: 10,   available_until: thu, 14 jul 2016 18:01:24 utc +00:00,   percentual: true,   school_id: 1,   created_at: fri, 15 jul 2016 18:01:25 utc +00:00,   updated_at: fri, 15 jul 2016 18:01:25 utc +00:00>   ]

with .uniq:

[#<coupon:0x0000001c786498   id: 68100775,   name: "how_to_code_not_used",   token_type: "manual",   value: 1000,   quantity: 5,   available_until: sat, 15 jul 2017 18:01:24 utc +00:00,   percentual: false,   school_id: 1,   created_at: fri, 15 jul 2016 18:01:25 utc +00:00,   updated_at: fri, 15 jul 2016 18:01:25 utc +00:00>,  #<coupon:0x0000001c7859d0   id: 214172726,   name: "learn_ruby_30",   token_type: "manual",   value: 30,   quantity: 10,   available_until: thu, 14 jul 2016 18:01:24 utc +00:00,   percentual: true,   school_id: 1,   created_at: fri, 15 jul 2016 18:01:25 utc +00:00,   updated_at: fri, 15 jul 2016 18:01:25 utc +00:00>,  #<coupon:0x0000001c784fa8   id: 387313615,   name: "global_demo",   token_type: "manual",   value: 75,   quantity: 5,   available_until: sat, 15 jul 2017 18:01:24 utc +00:00,   percentual: true,   school_id: 1,   created_at: fri, 15 jul 2016 18:01:25 utc +00:00,   updated_at: fri, 15 jul 2016 18:01:25 utc +00:00>,  #<coupon:0x0000001c784800   id: 469697148,   name: "learn_ruby_20",   token_type: "manual",   value: 20,   quantity: 10,   available_until: sat, 15 jul 2017 18:01:24 utc +00:00,   percentual: true,   school_id: 1,   created_at: fri, 15 jul 2016 18:01:25 utc +00:00,   updated_at: fri, 15 jul 2016 18:01:25 utc +00:00>,  #<coupon:0x0000001c784008   id: 548707893,   name: "how_to_code_free",   token_type: "manual",   value: 100,   quantity: 5,   available_until: sat, 15 jul 2017 18:01:24 utc +00:00,   percentual: true,   school_id: 1,   created_at: fri, 15 jul 2016 18:01:25 utc +00:00,   updated_at: fri, 15 jul 2016 18:01:25 utc +00:00>,  ]

use order along uniq:

# assuming want sort name  coupon.where(...).uniq.order(name: :desc)

use :asc instead of :desc reverse order. see active record query interface docs more.


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