Ruby：如何根据变量数量在 Active Admin 面板中对单词进行复数/单数化（Active Admin、rails 3.2、ruby）

Question

我是 Ruby on Rails 的新手，我无法根据单词的数量更改单词的结尾。

在下面代码的顶部附近，你会看到我写的

h3 "The deal has #{deal.prizes.where(:prize_type => u).count} #{u}

此处的“u”采用名为 PRIZE_TYPE 的数组中的值之一。 我怎么能这样做

• 如果count= 1，则显示“这笔交易有1个头奖”

• 如果count=4，则显示“这笔交易有4个头奖

注意：计数不能为 = 0 或 < 0

这是我的代码：

panel "Details of Prizes" do

      PRIZE_TYPES.each do |u|

        table_for deal.prizes.where(:prize_type => u) do |t|
          h3 "The deal has #{deal.prizes.where(:prize_type => u).count} #{u}s
          initially set in the campaign for a total value of #{custom_number_to_currency (deal.category_prizes_total_initial_value(u)) }", class: 'title-within-table'
          if deal.prizes.where(:prize_type => u).count > 0 # if there is at least one record of 'jackpot prize'
            t.column("Prize")             { |prize| link_to( image_tag( prize.prize_image_url, class: 'main_img_in_admin_interface' ), admin_prize_path(prize), target: :blank ) }
            t.column("Name")              { |prize| link_to prize.prize_name, admin_prize_path(prize), target: :blank }
            t.column("Category")          { |prize| prize.prize_category }
            t.column("Initial quantity")  { |prize| prize.prize_initial_stock_quantity }

      end # end of Prize.each...

    end # end of panel "details of prizes"

和 PRIZE_TYPE 常量：

PRIZE_TYPES = ["Jackpot prize","Consolation prize", "awesome prize"]

Answer 1

您可以使用 ruby​​ 的复数形式：

prize_type.pluralize(count)
"Jackpot prize".pluralize(1)
#> Jackpot prize
"Jackpot prize".pluralize(2)
#> Jackpot prizes

或者ActiveSupport::Inflector.pluralize如果你想自己做检查：

prize_type.pluralize
"Jackpot prize".pluralize
#> "Jackpot Prizes"

或者 rails 有复数形式，它使用组合Inflector和一些基本逻辑：

pluralize(count, prize_type)
pluralize(1, prize_type)
#> 1 Jackpot prize
pluralize(2, prize_type)
#> 2 Jackpot prizes

Answer 2

您可以使用 ruby​​ 实例方法

http://apidock.com/rails/ActionView/Helpers/TextHelper/pluralize

"string".pluralize(count)

所以对于你的情况，

prizes_count = deal.prizes.where(prize_type: u).count
h3 "The deal has #{prizes_count} #{u.pluralize(prizes_count)}"

Answer 3

使用pluralize

count = deal.prizes.where(:prize_type => u).count
h3 "The deal has #{count} #{u.pluralize(count)}}"

Answer 4

根据复数

你可以做

pluralize(1, 'person')
# => 1 person

pluralize(2, 'person')
# => 2 people

pluralize(3, 'person', plural: 'users')
# => 3 users

pluralize(0, 'person')
# => 0 people

pluralize(2, 'Person', locale: :de)
# => 2 Personen