Question

我正在构建一个quizz应用程序，用户可以在其中输入正确的答案到数字字段。我想使用此字段中的值作为button_to方法中的参数来创建新答案。如果我单击该按钮，它会创建一个新的答案，前两个参数作为属性，但givenanswer的属性为空。我没有收到错误，它只是没有将我的givenanswer参数设置为属性。

如何在字段中获取值并将其用作参数？我应该使用帮手吗？（我刚刚开始使用铁杆，还没有使用帮手）。

Questionscontroller

class QuestionsController < ApplicationController

  def showquestion
    @question = Question.find(params[:id]) 
  end

  # . . .

showquestion

views/questions/showquestion/1
    <b>Question:</b>
    <%=h @question.word %>
<b>1:</b>
<%=h @question.ans1 %>

<b>2:</b>
<%=h @question.ans2 %>

<b>The correct answer is number: </b>
<%=number_field :givenanswer, params[:givenanswer]%>

<%= button_to 'add answer', {:controller => "answers", :action => "create", 
                :question_id => @question.id, :questionfinished => Time.now, :givenanswer => params[:givenanswer] }  %>

Answercontroller

class AnswersController < ApplicationController
  before_action :set_answer, only: [:show, :edit, :update, :destroy]

  # POST /answers
  # POST /answers.json
  def create
  question =Question.find(params[:question_id])
  questionfinished = params[:questionfinished]
  givenanswer = params[:givenanswer]
   @answer = Answer.new(question: question, questionfinished: questionfinished, givenanswer: givenanswer)

    respond_to do |format|
      if @answer.save
        format.html { redirect_to @answer, notice: 'Answer was successfully created.' }
        format.json { render action: 'show', status: :created, location: @answer }
      else
        format.html { render action: 'new' }
        format.json { render json: @answer.errors, status: :unprocessable_entity }
      end
    end
  end

更新：我试图在一个表单中使用它，它似乎工作：现在我确实有一个属性givenanswer答案对象。但是，它总是存储一个0，无论我在表单中插入什么数字。

 <%= form_tag(:controller => "answers", :action => "create", :question_id => @question.id, :questionfinished => Time.now, :givenanswer => :givenanswer) do %>
   <p>
    <b>Het juiste antwoord is nummer: </b>
    <%=number_field :givenanswer, params[:givenanswer]%>
   </p>

   <p><%= submit_tag("voegantwoordtoemetformtag")%></P>
<% end %>

Answer 1

我认为您应该使用表单，但如果您真的想要，可以使用javascript动态更改值

Rails：使用字段值作为参数

1 个答案: