在Rails中对部分排序的列表进行排序 [英] Sorting a Partially sorted list in Rails

问题描述

这个问题最初源于我在此处发表的另一篇SO帖子.但是，该问题实际上是一个Rails问题，我试图简化该问题以使其更简单，这将使我的答案更易于管理，并且不会使有兴趣的人感到沮丧.这是原始问题:

This question originally stems from another SO post I made here. However, the problem was in fact a Rails problem, and I tried to strip down the problem to make it more simple, which would give me answers more manageable and not frustrate individuals interested in helping. Here's the original problem:

在我的initializers文件夹中，我有一个非常复杂的集合，即带有数组的哈希散列.该集合如下所示:

In my initializers folder, I had a really complex collection, a hash of hashes with arrays. The collection looks like the following:

Locations = { :Australia => { :cities => %w(Sidney Melbourne Other),
                              :currency => 'AUD'},
              :Canada =>  { :cities => %w(Montreal Toronto Other),
                           :currency => 'CAD'},
              :England =>  { :cities => %w(London Other),
                           :currency => 'GBP'},
              :Israel =>  { :cities => ['Jerusalem', 'Tel Aviv', "Modi'in", 'Netanya', 'Haifa', 'Other'],
                            :currency => 'ILS'},
              :USA =>     { :cities => ['Chicago', 'Los Angeles', 'Miami', 'Teaneck', 'New York', 'Brooklyn', 'Queens', 'Bronx',
                                     'Washington', 'Other'],
                            :currency => 'USD'},
              :France =>  { :cities => %w(Paris Other),
                            :currency => 'EUR'},
              :Switzerland =>  { :cities => %w(Zurich Antwerp Other),
                            :currency => 'CHF'},
              :South_Africa => { :cities => ['Johannesburg', 'Cape Town', 'Other'],
                                  :currency => 'ZAR'},
              :Argentina => { :cities => ['Buenos Aires', 'Other'],
                   :currency => 'ARS'}
            }

在我看来，我使用初始化程序对选定国家/地区的城市进行了以下排序:

In my views, I used the initializer to the sort the cities of the selected country with the following:

             tr
                -city_select = Locations.collect { |country_name, country_info | country_info[:cities].collect {|city| [city, city, class: country_name] } }.flatten(1)
                th
                  = f.label :city, '*City'
                td
                  = f.select :city, city_select, {}, id: 'property_city'

问题在于，当我选择下拉列表中的城市(选择国家/地区)后，该列表将无法排序.如果我刚在块{| city |上添加了.sort， [city，city，class:country_name]}.sort，城市组将按字母顺序排序，包括单词"Other".我不知道如何对城市列表进行部分排序，并在末尾附加成员其他".

The problem was that when I selected the drop down, city, after selecting the country, the list would be unsorted. If I just added, .sort, on the block {|city| [city, city, class: country_name]}.sort, the group of cities would be sorted alphabetically, including the word "Other". I did not know how to partially sort the list of cities and append the member, Other, at the end.

推荐答案

感谢@wayneThis回答我的问题:

Thanks to @wayneThis answer my question:

          tr
            -city_select = Locations.collect { |country_name, country_info | country_info[:cities].collect {|city|    [city, city, class: country_name] }.sort_by { |(city)| [city == "Other" ? 1 : 0, city]}.push(["Other"]) }.flatten(1)
            th
              = f.label :city, '*City'
            td
              = f.select :city, city_select, {}, id: 'property_city'

由于@WayneConrad和@bjhaid，我得以解决我的问题.

Thanks to @WayneConrad and @bjhaid, I was able to solve my problem.

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