是的,有办法。
<%= f.collection_select(:country, ISO3166::Country.countries.sort_by(&:name).collect { |c| [ c.name, "#{c.name} #{c.emoji_flag}" ] }, :first, :last, {include_blank: 'Select a country'}, class: "select__picker", 'data-style': 'form-control', required: true) %>
collection_select
只接受一个方法名作为text_method
参数。在参数text_method
上调用collection
,即:
ISO3166::Country.countries.sort_by(&:name).collect { |c| [ c.name, "#{c.name} #{c.emoji_flag}" ] }
因此,在您的情况下,您需要:first
以下值和:last
选项文本:
[
['COUNTRY_1_NAME', 'COUNTRY_1_NAME COUNTRY_1_FLAG'],
['COUNTRY_2_NAME', 'COUNTRY_2_NAME COUNTRY_2_FLAG']
etc.
]