我创建了一个测验并将每页显示一个问题作为部分形式，当我使用创建时，我想要在创建之前检查的单选按钮的值。当我接下来在我的控制器中使用 params[:answer] 时，它返回 null .. 谁能帮我获取我检查的单选按钮的值
提前致谢
<div class = "y">
<% form_for @answer do |f|%>
<div class = "label_field_pair">
<label for "questions">
<%= @ans.ques %>
</label>
</div> <br>
<div class = "label_field_pair2">
<label for "options">
<div id = "option-1">
<%= radio_button_tag "answer", "#{@ans.id}ans1"%><%= @ans.ans1 %>
</div><br>
<div id = "option-2">
<%= radio_button_tag "answer", "#{@ans.id}ans2"%><%= @ans.ans2 %>
</div><br>
<div id = "option-3">
<%= radio_button_tag "answer", "#{@ans.id}ans3"%><%= @ans.ans3 %>
</div><br>
<div id = "option-4">
<%= radio_button_tag "answer", "#{@ans.id}ans4"%><%= @ans.ans4 %>
</div><br>
</label>
</div>
<div class="next">
<%= link_to_remote "Next",
:before => "Element.show('loader')",
:success => "Element.hide('loader')",
:url=>{:controller=>"answers", :action=>"next"},
:with => "'&passed_question=#{@ans.id}&'+'&exam_group_id=#{@exam_group.id}&'"
%>
<% end %>
</div>
<% end %>
</div>
并在控制器中
def next
@user = current_user
@student = Student.find_by_admission_no(@user.username)
@exam_group = ExamGroup.find_by_id(params[:exam_group_id])
@answer = Answer.new(params[:ans])
@answer.answer = params[:answer]
@answer.exam_group_id = @exam_group.id
@answer.user_id = @user.id
passed_question = params[:passed_question]
@answer.questions_id = passed_question
if @answer.save
@ans = Question.find_by_id(left_random, :conditions => ['id not in (?) && exam_group_id=?',answered, @exam_group])
render(:update) do |page|
page.replace_html 'main', :partial => 'ans', :object => @ans
end
end
end
def ans
@user = current_user
@student = Student.find_by_admission_no(@user.username)
@exam_group = ExamGroup.find(params[:exam_group_id])
@tot_ans = answered.count
@last_ques = (Question.count-1)
render(:update) do |page|
page.replace_html @ans, :partial => 'ans', :object => @ans
end
end