[英]Dynamic Dropdown Menus Ruby on Rails form_for
以下是我要完成的工作的JSFiddle:
https://jsfiddle.net/sherali/jkw8fxzf/12/
HTML:
<select id="first-choice">
<option value="English">English</option>
<option value="Spanish">Spanish</option>
</select>
<select id="second-choice">
<option value="Spanish">Spanish</option>
<option value="English">English</option>
</select>
JS:
var $secondOption= $('#second-choice>option').clone();
$("#first-choice").change(function() {
var userSelected = $(this).val();
$('#second-choice').html($secondOption);
// $("#second-choice").val(userSelected)
$('#second-choice option[value="'+userSelected+'"').remove()
});
我正在尝试使用上面的代码,当使用如下所示的rails form_for方法时,该代码可以正常工作并将其转换为具有相同行为的对象:
<%= form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f| %>
<%= f.label :natives_language, "Native Language" %>
<%= f.select :natives_language, [ 'Spanish', 'English'], :class => "first-choice" %>
<%= f.label :next_language, "I Want To Learn" %>
<%= f.select :next_language, [ 'English', 'Spanish'], :class => "second-choice" %>
<% end %>
产生以下html:
<label for="user_natives_language">Native Language</label>
<select id="user_natives_language" name="user[natives_language]">
<option value="English">English</option>
<option value="Spanish">Spanish</option>
</select>
<label for="user_next_language">I Want To Learn</label>
<select id="user_next_language" name="user[next_language]">
<option value="Spanish">Spanish</option>
<option value="English">English</option>
</select>
出于某种原因,似乎没有添加first-choice和second-choice类。 关于如何使它起作用的任何想法?
谢谢并恭祝安康。
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