解释单选按钮如何为form_for工作？

Question

请建议我正确的语法我希望用户应该是男性还是女性我无法找到它的正确用法.

这是我的表单,单击单选按钮时,两者都被选中并保持选中状态.我希望那个用户应该选择男性或女性.

<%= form_for @user do |f| %>  
      <div class="well-lg">
      <h4>Personal Details</h4>
      <div class="form-group">
        <%= f.label :First_Name %><br />
         <%= f.text_field :fname, :class=> 'form-control' %>
      </div>
      <div class="form-group">
        <%= f.label :Last_Name %><br />
        <%= f.text_field :lname, :class=> 'form-control' %>
      </div>
      <div class="form-group">
        <%= f.label :Email_Address %><br />
        <%= f.text_field :email, :class=> 'form-control' %>
      </div>
      <div class="form-group">
        <%= f.label :Mobile_No%><br />
        <%= f.text_field :mob, :class=> 'form-control' %>
      </div>
      <div class="form-group">
        <%= f.label :Gender %> <br />
        <%= f.label :Gender, 'male' %>
        <%= f.radio_button :gender_male, 'male' %>
        <%= f.label :Gender, 'female' %>
        <%= f.radio_button :gender_female, 'female' %><br />
      </div>
      <div class="form-group">
        <%= f.label :Country %><br />
        <%= f.text_field :country, :class=> 'form-control' %>
      </div>
      <div class="form-group">
        <%= f.label :State %><br />
        <%= f.text_field :state, :class=> 'form-control'  %>
      </div>
      <div class="form-group">
        <%= f.label :Suburb %><br />
        <%= f.text_field :suburb, :class=> 'form-control'  %>
      </div>
      <div class="form-group">
        <%= f.label :Postal_Code %><br />
        <%= f.text_field :postal, :class=> 'form-control'  %>
      </div>
      <div class="form-group">
        <%= f.label :Address %><br />
        <%= f.text_area :add, :class=> 'form-control' %>
      </div>
      <div class="button">
        <%= f.submit "Next" %>
      </div>
    </div>
<% end %>

请帮我解决这个问题

class CreateUsers < ActiveRecord::Migration
  def change
    create_table :users do |t|
      t.string :fname
      t.string :lname
      t.string :email
      t.string :mob
      t.string :gender
      t.string :country
      t.string :state
      t.string :suburb
      t.string :postal
      t.string :add
      t.timestamps
    end
  end
end

Answer 1

试试这个 .......

<div class="form-group">
   <%= f.label :gender %> <br />
   <%= f.label :gender_male, 'male' %>
   <%= f.radio_button :gender, 'male', :checked => true %>
   <%= f.label :gender_female, 'female' %>
   <%= f.radio_button :gender, 'female' %><br />
</div>

希望这会帮助你.