Ruby radio_button_tag没有服从`checked：true`

Question

由于某种原因，radio_button_tag块中的form_tag将不遵守已检查的参数。我已尝试true，:checked => checked，checked: true以及所有不同的组合。

这是我的代码，第三个参数为true

<%= radio_button_tag :metric_type, :followers_count, true, :class => 'chart-radio-icon' %>
<%= label :metric_type, 'Followers', :class => 'chart-radio-label chart-radio-metrics-social' %>

documentation读取

radio_button_tag 'color', "green", true, class: "color_input"
# => <input checked="checked" class="color_input" id="color_green" name="color" type="radio" value="green" />

然而，在DOM中它呈现为：

<input type="radio" name="metric_type" id="metric_type_followers_count" value="followers_count">

==更新=====================

ruby -v ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-darwin15]

rails -v Rails 5.0.1

注意 - 我还没有在这些类上设置任何样式。

    <div>
    <%= form_tag url_for(controller: 'analytics', action: 'mega_chart'), method: :get, remote: true do %>

    <p class='chart-legend-header'>Social</p>
    <%= radio_button_tag :metric_type, :followers_count, :class => 'chart-radio-icon' %>
    <%= label :metric_type, 'Followers', :class => 'chart-radio-label chart-radio-metrics-social' %>

    <%= radio_button_tag :metric_type, :views_count, :class => 'chart-radio-icon' %>
    <%= label :metric_type, 'Views', :class => 'chart-radio-label chart-radio-metrics-social' %>

    <%= radio_button_tag :metric_type, :comments_count, :class => 'chart-radio-icon' %>
    <%= label :metric_type, 'Comments', :class => 'chart-radio-label chart-radio-metrics-social' %>

    <%= radio_button_tag :metric_type, :shares_count, :class => 'chart-radio-icon' %>
    <%= label :metric_type, 'Shares', :class => 'chart-radio-label chart-radio-metrics-social' %>

    <%= radio_button_tag :metric_type, :dislikes_count, :class => 'chart-radio-icon' %>
    <%= label :metric_type, 'Dislikes', :class => 'chart-radio-label chart-radio-metrics-social' %>

    <%= radio_button_tag :metric_type, :media_count, :class => 'chart-radio-icon' %>
    <%= label :metric_type, 'Posts', :class => 'chart-radio-label chart-radio-metrics-social' %>

    <p class='chart-legend-header'>Options</p>
    <%= radio_button_tag :date_range, 30.days.ago, true, :class => 'chart-radio-icon' %>
    <%= label :date_range, '30 Days', :class => 'chart-radio-label chart-radio-options-date' %>
    <%= radio_button_tag :date_range, 90.days.ago, :class => 'chart-radio-icon' %>
    <%= label :date_range, '90 Days', :class => 'chart-radio-label chart-radio-options-date' %>

    <%= radio_button_tag :benchmark_type, 'daily_gain', true, :class => 'chart-radio-icon' %>
    <%= label :benchmark_type, 'Daily Gain', :class => 'chart-radio-label chart-radio-options-benchmark' %>
    <%= radio_button_tag :benchmark_type, 'total', :class => 'chart-radio-icon' %>
    <%= label :benchmark_type, 'Total', :class => 'chart-radio-label chart-radio-options-benchmark' %>

    <%= submit_tag 'Refresh Chart', :id => 'chart-submit' %>
  <% end %>
</div>

以下是视图中的样子

Answer 1

在进一步检查HTML后，我发现所有的单选按钮都呈现为checked="checked"所以我将每个第三个参数标记为false，除了我想要的那个真实！

<%= radio_button_tag :metric_type, :followers_count, true, :class => 'chart-radio-icon' %>
<%= label_tag(:metric_type_followers_count, 'Followers', :class => 'chart-label chart-label-social') %>