ruby-on-rails - rails : how to use language list gem with select_tag in a form?

Question

我正在尝试创建一个表单，其中一个问题是选择一种特定的语言。我在这里尝试使用语言列表 gem:https://github.com/scsmith/language_list .但是，文档并没有真正告诉我如何将列表与 select_tag 结合起来。

<%= form_for users_path, :method => "get" do %>

    <%= label_tag "Select Country" %> <br>
    <%= country_select(:user, :country, [], :include_blank => true) %> <br>

    <%= label_tag "Language spoken" %>
    <%= select_tag "Language", options_from_collection_for_select(LanguageList::COMMON_LANGUAGES, "id", "name") %>

    <%= label_tag "City" %> <br>
    <%= text_field_tag(:city) %>


<% end %>

给我错误

undefined method 'id' for afr (af) - Afrikaans:LanguageList::LanguageInfo

在线

<%= select_tag "Language", options_from_collection_for_select(LanguageList::COMMON_LANGUAGES, "id", "name") %>

谁能帮帮我？

Answer 1

不要使用"id"。文档说你应该使用 iso_639_1(或者如果你想要 3 字母代码则使用 iso_639_3)

<%= select_tag "Language", options_from_collection_for_select(LanguageList::COMMON_LANGUAGES, "iso_639_1", "name") %>