驗證答案

Question

我正在驗證我正在構建的遊戲應用程序的答案。我遇到了正確的數據庫調用問題。

問題＃validate_answer

def validate_answer 
    @answer = Answer.where(correct: true) 
    @correct_answer = @answer 
    @selected_answer = params[:answer] 

    #check if the submitted answer is the correct answer 

    if @selected_answer == @correct_answer 
    render :success 
    else 
    render :error 
    end 
end 

Question.rb

class Question < ActiveRecord::Base 
    belongs_to :category 

    has_many :answers 

    has_one :video_clue 
    has_many :answers 

    def correct_answer 
    answers.find_by correct: true 
    end 
end 

Answer.haml

%form#form{:action => results_path(@question), :method => "post"} 

- @answers.each do |answer| 

.form-group 
.radio 

%input{:name => 'q_id', :type => 'hidden',:value =>'#{@question.id}'} 

%input.btn.btn-default.btn-block{:name => 'answer', :style => 'vertical-align: middle; margin:0px;', :type => 'submit', :value => answer.text} 

Seeds.rb

q = Question.create question: "In what year did MTV (Music Television) premiere and what was the first music video the channel aired?", category_id: 1 
q.answers.create text: '1982 Michael Jackson Bille Jean' 
q.answers.create text: '1984 Madonna Like a virgin' 
q.answers.create text: '1981 The Buggles Video Killed The Radio Star', correct: true 

目標是將所選答案與正確答案進行匹配。它不斷呈現'失敗'頁面。

Answer 1

我相信你正在比較一個字符串到一個ActiveRecord對象當然會失敗。

即'1982 Michael Jackson Bille Jean' != <Answer id:1 text:"1982 Michael Jackson Bille Jean">

你有沒有考慮傳遞答案的ID而不是文本，然後進行比較。這將允許您查詢用戶選擇的答案。例如

問題＃validate_answer

def validate_answer 
    @answer = Answer.where(correct: true) 
    @correct_answer = @answer 
    @selected_answer = Answer.find(params[:answer_id]) 

#check if the submitted answer is the correct answer 

    if @selected_answer == @correct_answer 
    render :success 
    else 
    render :error 
    end 
end 

或者你需要比較params[:answer]於文本屬性

問題＃validate_answer

def validate_answer 
    @answer = Answer.where(correct: true) 
    @correct_answer = @answer.text 
    @selected_answer = params[:answer] 

#check if the submitted answer is the correct answer 

    if @selected_answer == @correct_answer 
    render :success 
    else 
    render :error 
    end 
end