Question

我有一个Rails应用程序，其SQLite数据库有一个移位表，每个Shift都有beginning_at列，其值类型为时间，表示班次开始的小时。价值类型时间的end_at列表示班次结束的小时。

事实上这个表实际上只有两个记录; 早晨转变 begins_at上午10点和ends_at当天下午5点30分。第二条记录为Evening Shift begins_at下午6点30分，ends_at第二天凌晨2点。

我还有订单表，每个订单belongs_to都有一个班次。

问题是我想要一个控制器动作可以索引从以下创建的所有订单：此操作触发的转移的开始，直到此转变结束。< /强>

此操作的目的实际上是在每个工作班次结束时查看销售量

我认为这一切都结束了，但我无法找到起点，请帮助我。这对我的申请非常重要。

Answer 1

我没有假装唯一可行的解决方案，但试试这个：

# orders.rb
class Order < ActiveRecord::Base
  belongs_to :shift

  scope :at_morning_shift, -> { where(shift: Shift.morning).order('created_at asc') }
  scope :at_night_shift, -> { where(shift: Shift.night).order('created_at asc') }

  def self.current_shift
    begins_time, ends_time = Shift.morning.begins_at, Shift.morning.ends_at
    if (begins_time.hour..ends_time.hour).cover?(Time.now.hour)
      Order.at_morning_shift
    else
      Order.at_night_shift
    end
  end
end


# shift.rb
class Shift < ActiveRecord::Base
  has_many :orders

  def self.morning
    find_by_name("Morning shift")
  end

  def self.night
    find_by_name("Night shift")
  end

end

# orders_controller.rb
class OrdersController < ApplicationController

  def index
    @orders = Order.current_shift
  end
end

这是控制台输出：

[86] pry(main)> Time.now.utc
=> 2016-08-22 05:05:50 UTC
[87] pry(main)> Order.current_shift
  Shift Load (0.3ms)  SELECT  "shifts".* FROM "shifts" WHERE "shifts"."name" = $1 LIMIT 1  [["name", "Morning shift"]]
  Shift Load (0.2ms)  SELECT  "shifts".* FROM "shifts" WHERE "shifts"."name" = $1 LIMIT 1  [["name", "Morning shift"]]
  Shift Load (0.2ms)  SELECT  "shifts".* FROM "shifts" WHERE "shifts"."name" = $1 LIMIT 1  [["name", "Night shift"]]
  Order Load (0.3ms)  SELECT "orders".* FROM "orders" WHERE "orders"."shift_id" = 2  ORDER BY created_at asc
=> [#<Order:0x007fbdc88888c0 id: 1, name: "molestiae", phone: nil, product_id: nil, created_at: Mon, 22 Aug 2016 04:32:53 UTC +00:00, updated_at: Mon, 22 Aug 2016 04:32:53 UTC +00:00, shift_id: 2>,
 #<Order:0x007fbdc8888730 id: 5, name: "explicabo", phone: nil, product_id: nil, created_at: Mon, 22 Aug 2016 04:33:40 UTC +00:00, updated_at: Mon, 22 Aug 2016 04:33:40 UTC +00:00, shift_id: 2>,
 #<Order:0x007fbdc8888578 id: 6, name: "cupiditate", phone: nil, product_id: nil, created_at: Mon, 22 Aug 2016 04:33:40 UTC +00:00, updated_at: Mon, 22 Aug 2016 04:33:40 UTC +00:00, shift_id: 2>,
 #<Order:0x007fbdc88883e8 id: 7, name: "rerum", phone: nil, product_id: nil, created_at: Mon, 22 Aug 2016 04:33:40 UTC +00:00, updated_at: Mon, 22 Aug 2016 04:33:40 UTC +00:00, shift_id: 2>,
 #<Order:0x007fbdc8888258 id: 8, name: "totam", phone: nil, product_id: nil, created_at: Mon, 22 Aug 2016 04:33:40 UTC +00:00, updated_at: Mon, 22 Aug 2016 04:33:40 UTC +00:00, shift_id: 2>,
 #<Order:0x007fbdc88880c8 id: 9, name: "inventore", phone: nil, product_id: nil, created_at: Mon, 22 Aug 2016 04:33:40 UTC +00:00, updated_at: Mon, 22 Aug 2016 04:33:40 UTC +00:00, shift_id: 2>,
 #<Order:0x007fbdc8883ed8 id: 11, name: "saepe", phone: nil, product_id: nil, created_at: Mon, 22 Aug 2016 04:33:40 UTC +00:00, updated_at: Mon, 22 Aug 2016 04:33:40 UTC +00:00, shift_id: 2>]
[88] pry(main)>

请注意，您应该注意应用和客户端的time_zone。但基本方法将保持不变。

如何查询工作班次中创建的记录？

1 个答案: