我的rails应用程序有问题。
我的模特:
测验:姓名
问题:text,quiz_id
回答:text,question_id
right_answer:question_id,answer_id
测验有很多问题。单个问题有很多答案,答案只有一个正确答案。
我该如何解决这个问题?
这是我的表格:
<%= form_for([@quiz, @question]) do |f| %>
<% if @question.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@question.errors.count, "error") %> prohibited this question from being saved:</h2>
<ul>
<% @question.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :text %><br>
<%= f.text_field :text %>
</div>
<%= f.fields_for :answers do |u| %>
<%= u.text_field :text, class: "form-control", id: "answer"%>
<% end %>
<div class="actions">
<%= f.submit %>
我想在每个答案中添加一个单选框,以选择哪个答案是正确的。
问题 - 控制器:
def new
@question = Question.new
@question.answers.build
end
def create
@question = Question.new(question_params)
@question.quiz_id = @quiz.id
i = 0
until question_params[:answers_attributes].count
@answer = @question.answers.new(question_params[:answers_attributes]["#{i}"])
@answer.save
i += 1
end
respond_to do |format|
if @question.save
format.html { redirect_to quiz_questions_path(@quiz), notice: 'Question was successfully created.' }
format.json { render :show, status: :created, location: @question }
else
format.html { render :new }
format.json { render json: @question.errors, status: :unprocessable_entity }
end
end
end
我如何在我的控制器和我的表单中执行此操作,因为我只有一个right_answer但我的表单中需要4个单选按钮?
由于
答案 0 :(得分:1)
在答案表中添加一个新的布尔字段correct_answer
:
rails g migration add_correct_answer_to_answer correct_answer:boolean
questions_controller.rb
def new
@question = Question.new
4.times { @question.answers.build } # you can do it dynamically
end
def question_params
params.require(:question).permit(:text, answers_attributes: [:id, :text, :correct_answer])
end
问题/ _form.rb
<%= f.fields_for :answers do |builder| %>
<%= render 'answer', f: builder %>
<% end %>
问题/ _answer.html.erb
<%= f.label :text, "Answer" %>
<%= f.text_field :text %>
<%= f.radio_button :correct_answer %>
然后,您可以创建问题模型中的范围,以便轻松获得特定问题的正确答案。
答案 1 :(得分:1)
= f.collection_radio_buttons:answer_id,@ question.answers.all,:id,:name_with_initial