Question

我正在尝试计算运费，具体取决于使用Fedex gem https://github.com/jazminschroeder/fedex购买的产品总数。我得到了费率，但我有不同的套餐选择，实际上是3。数量为1（小）时的第一个，数量为2（中）时的第二个，数量为3或4（更大）时的第三个。

def packages_types
    packages = []
    if @order.quantity >= 4
      packages << { :weight => {:units => "LB", :value => @order.case_weight},
                    :dimensions => {:length => 8, :width => 1, :height => 7, :units => "IN" } }
    elsif @order.quantity == 2
      packages << { :weight => {:units => "LB", :value => 21},
                    :dimensions => {:length => 1, :width => 2, :height => 7, :units => "IN" } }
    elsif @order.quantity == 1
      packages << { :weight => {:units => "LB", :value => 10},
                    :dimensions => {:length => 1, :width => 2, :height => 2, :units => "IN" } }
    end
end

因此，如果客户在数量上订购5。这将是4个（大）和1个小包装的包装。我在想使用mod ...

Answer 1

def packages_types
  packages              = []
  extra_items_count     = @order.quantity % 4
  large_packages_needed = (@order.quantity - extra_items_count) / 4

  # point A
  large_packages_needed.times do
    packages << { :weight     => { :units => "LB", :value => @order.case_weight },
                  :dimensions => { :length => 8, :width => 1, :height => 7, :units => "IN" } }
  end

  # point B
  case extra_items_count
  when 1
    packages << { :weight     => { :units => "LB", :value => 10 },
                  :dimensions => { :length => 1, :width => 2, :height => 2, :units => "IN" } }
  when 2
    packages << { :weight     => { :units => "LB", :value => 21 },
                  :dimensions => { :length => 1, :width => 2, :height => 7, :units => "IN" } }
  when 3, 4
    packages << { :weight     => { :units => "LB", :value => @order.case_weight },
                  :dimensions => { :length => 8, :width => 1, :height => 7, :units => "IN" } }
  end

  return packages
end

A点：对于每组4个项目，需要一个大包（并添加到packages数组中）。

B点：对于其余项目（例如：您订购了5件商品 - ＆gt; 1件大件包装4件商品+ 1件小件用于1件剩余商品），我们在{添加相应条件{1}}数组。

Fedex gem，倍数包

1 个答案: